H11 Roof and Wall Systems ............................................................................ 5

Central Market Development, Abu Dhabi
Contents
H11 ROOF AND WALL SYSTEMS............................................................................5
H11.1000 SCOPE, SUBMITTALS, TESTING AND PERFORMANCE ............................. 5
H11.1100 SPECIFICATION AND SCOPE ....................................................................................... 5

H11.1101 Descriptive Works..........................................................................................................................................................................5
H11.1102 Scope of Works..............................................................................................................................................................................5
H11.1103 Interfaces ..........................................................................................................................................................................................5
H11.1200 SYSTEM DESCRIPTIONS/TYPES.................................................................................. 5

Souk External Wall Cladding Systems ..................................................................................................................................... 5
H11.1201 Type EWS-01 Cladding System ...............................................................................................................................................5
H11.1207 Type EWS-07 Walling System ..................................................................................................................................................8
H11.1209 Type EWS-18 Temporary Cladding system. ..........................................................................................................................8
Roofglazing Systems..................................................................................................................................................................... 9
H11.1240 Type RFL-01 Roofglazing System .............................................................................................................................................9
H11.1242 Type RFL-03A Roofglazing System ..........................................................................................................................................9
H11.1243 Type RFL-03C Roofglazing System..........................................................................................................................................9
Internal Walling Systems........................................................................................................................................................... 10
H11.1261 Type IWS-01 Internal Walling System .................................................................................................................................. 10
H11.1264 Type IWS-04 Internal Walling System ............................................................................................................................. 1110
Shading Devices.......................................................................................................................................................................... 11
H11.1271 Type SHD-01 Shading Device ................................................................................................................................................ 11
Glass Doors............................................................................................................................................................................. 1111
H11.1281 Type EDR-01 Bronze Doors ............................................................................................................................................... 1211
H11.1282 Type EDR-02 Bronze Doors ............................................................................................................................................... 1211
H11.1284 Type EDR-04 Aluminium Doors ......................................................................................................................................... 1211
H11.1300 SUBMITTALS AND TESTING ................................................................................... 1211

Tender Submittals .................................................................................................................................................................. 1211
H11.1301 Tender Response ................................................................................................................................................................... 1211
Samples, Mock-ups, Prototypes and Quality Benchmarks .............................................................................................. 12
H11.1302 Pre-contract Samples ................................................................................................................................................................ 12
H11.1303 Post Contract Samples ............................................................................................................................................................. 13
H11.1304 Mock-up Requirements ........................................................................................................................................................ 1413
H11.1305 Prototype Requirements....................................................................................................................................................... 1413
H11.1306 Benchmark Requirements.................................................................................................................................................... 1413
Testing............................................................................................................................................................................................ 14
H11.1307 Previous/ Comparative Testing Certification........................................................................................................................ 14
H11.1308 Testing of Prototypes ................................................................................................................................................................. 14
H11.1309 Standard Test Apparatus and Calibration ....................................................................................................................... 1514
H11.1310 Air Permeability Tests............................................................................................................................................................ 1514
H11.1311 Façade Floor Air Leakage Testing. (To be confirmed by CA).......................................................................................... 15
H11.1312 Weatherproofing and Watertightness Tests........................................................................................................................ 15
H11.1313 Wind Resistance Tests......................................................................................................................................................... 1615
H11.1314 Impact Testing.............................................................................................................................................................................. 16
H11.1315 Off-Site Test Sequence............................................................................................................................................................. 16
H11.1316 Acoustic Testing – Initial Advance Test ........................................................................................................................... 1716
H11.1317 Structural Silicone Testing and Maintenance ................................................................................................................. 1716
H11.1318 Site Hose Testing................................................................................................................................................................... 1818
H11.1319 Testing of Fixings.................................................................................................................................................................... 1818
H11.1320 Thermal Cycling Tests........................................................................................................................................................... 1818
H11.1321 Building Movements/Racking Procedure Tests ............................................................................................................. 1818
H11.1322 Discretionary Tests - Screen Cladding – Noise and Vibration .................................................................................. 1818
H11.1323 Fire Tests .................................................................................................................................................................................. 1918
H11.1324 Results and Certificates ....................................................................................................................................................... 1919
Architectural Specification - Souk - Wall and H11/1 Foster and Partners

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H11.1400 PERFORMANCE REQUIREMENTS......................................................................... 1919

General ..................................................................................................................................................................................... 1919
H11.1401 General ..................................................................................................................................................................................... 1919
Structural Performance......................................................................................................................................................... 1919
H11.1402 Specific Movements .............................................................................................................................................................. 1919
H11.1403 Deflections ............................................................................................................................................................................... 2019
H11.1404 Design Loads .......................................................................................................................................................................... 2020
H11.1405 Seismic Loads......................................................................................................................................................................... 2020
H11.1406 Imposed Gravity Loads ......................................................................................................................................................... 2120
H11.1407 Live Loads ................................................................................................................................................................................ 2120
H11.1408 Imposed Movements ............................................................................................................................................................. 2121
H11.1409 Wind/Air Pressure Loads..................................................................................................................................................... 2121
H11.1410 Thermal Movement................................................................................................................................................................. 2121
H11.1411 Inertial Loads ........................................................................................................................................................................... 2221
H11.1412 Exceptional Loads .................................................................................................................................................................. 2221
H11.1413 Strength of Doors................................................................................................................................................................... 2222
Environmental Performance................................................................................................................................................. 2222
H11.1414 Moisture Movement ............................................................................................................................................................... 2222
H11.1415 Thermal Performance Requirements ................................................................................................................................. 2322
H11.1416 Solar Performance Requirements ...................................................................................................................................... 2322
H11.1417 Air Permeability/Infiltration.................................................................................................................................................... 2524
H11.1418 Condensation .......................................................................................................................................................................... 2525
H11.1419 Capillarity.................................................................................................................................................................................. 2525
H11.1420 Weather and Water Penetration Resistance .................................................................................................................. 2625
H11.1421 Local Factors ........................................................................................................................................................................... 2625
Acoustic .................................................................................................................................................................................... 2626
H11.1422 Acoustic Performance Requirements ............................................................................................................................... 2626
H11.1423 Flanking Transmission ........................................................................................................................................................... 2626
Fire ............................................................................................................................................................................................. 2626
H11.1424 General ..................................................................................................................................................................................... 2626
H11.1425 Surface Spread of Flame...................................................................................................................................................... 2726
H11.1426 Fire and Smoke Stopping .................................................................................................................................................... 2726
H11.1427 Fire Resistance ....................................................................................................................................................................... 2726
H11.1428 Joint System Required .......................................................................................................................................................... 2727
H11.1430 Fire Stopping between Floors............................................................................................................................................. 2727
Durability................................................................................................................................................................................... 2727
H11.1431 General ..................................................................................................................................................................................... 2727
H11.1432 Impact and Abrasion Resistance........................................................................................................................................ 2727
H11.1433 Demountability......................................................................................................................................................................... 2827
Components ............................................................................................................................................................................ 2827
H11.1434 Primary Components............................................................................................................................................................. 2827
H11.1435 Secondary Components....................................................................................................................................................... 2828
Services .................................................................................................................................................................................... 2828
H11.1436 Cables within Box Sections................................................................................................................................................. 2828
H11.1437 Opening Lights ....................................................................................................................................................................... 2928
Blinds......................................................................................................................................................................................... 2928
H11.1438 General ..................................................................................................................................................................................... 2928
H11.2000 SYSTEMS, MATERIALS AND FABRICATION ........................................... 2928
H11.2100 SYSTEMS .................................................................................................................... 2928

Wall Cladding Systems ........................................................................................................................................................ 2928
H11.2101 Framing to Screen Cladding ............................................................................................................................................... 2928
H11.2102 Bronze Cladding/Screens/Framing/Features ................................................................................................................. 3030
H11.2103 Insulated Backing Wall System .......................................................................................................................................... 3130
H11.2104 Aluminium Louvres ................................................................................................................................................................. 3131
H11.2105 Timber Cladding/Screens/Framing/Solar Shading/Features ..................................................................................... 3231
H11.2106 Aluminium Shading Devices................................................................................................................................................ 3232
Glazing ...................................................................................................................................................................................... 3232
H11.2110 Glass Types (Refer to section Z25 for general glass clauses) .................................................................................. 3232
Blinds......................................................................................................................................................................................... 3332
H11.2112 Fabric Blinds to Rooflights (SHD-04) .............................................................................................................................. 3332
H11.2114 Floor Channel Profiles........................................................................................................................................................... 3433
H11.2200 MATERIALS ................................................................................................................. 3433

General ..................................................................................................................................................................................... 3433
H11.2201 Fabric Specifications............................................................................................................................................................. 3433
Frames....................................................................................................................................................................................... 3434
H11.2202 Glass Retaining Frames Generally .................................................................................................................................... 3434
H11.2203 Glass Retaining Frames (Structural Silicone Glazing System) .................................................................................. 3534
H11.2204 Glass Retaining Frames with Dry Pressure Glazing System ...................................................................................... 3635

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H11.2205 Stainless Steel Framing........................................................................................................................................................ 3636

H11.2206 Solid Insulated Aluminium Faced Panels ......................................................................................................................... 3736
H11.2207 Solid Insulated Bronze Faced Panels ............................................................................................................................... 3736
H11.2208 Glass-To-Glass Corners...................................................................................................................................................... 3737
Joints.......................................................................................................................................................................................... 3737
H11.2209 Movement Joints ..................................................................................................................................................................... 3737
Windows .................................................................................................................................................................................. 3737
H11.2210 Opening Windows................................................................................................................................................................. 3737
Doors ......................................................................................................................................................................................... 3938
H11.2211 General ..................................................................................................................................................................................... 3938
H11.2212 Bronze Doors........................................................................................................................................................................... 3939
H11.2214 Framed Glazed Doors ........................................................................................................................................................... 4039
H11.2215 Ironmongery ............................................................................................................................................................................. 4040
Glazing ...................................................................................................................................................................................... 4140
H11.2216 Systems Generally ................................................................................................................................................................. 4140
H11.2217 Inclined Glazing ...................................................................................................................................................................... 4140
GRC........................................................................................................................................................................................... 4141
H11.2218 GRC Panels and screens to cladding system Generally............................................................................................. 4141
H11.2119 Copings Generally ................................................................................................................................................................. 4342
Flashings................................................................................................................................................................................... 4342
H11.2220 Flashings................................................................................................................................................................................... 4342
Fixings........................................................................................................................................................................................ 4343
H11.2221 Fixings Requirements ............................................................................................................................................................ 4343
H11.2222 Fixing Directly to Concrete Structure................................................................................................................................ 4443
Sealants and Gaskets ........................................................................................................................................................... 4443
H11.2223 Sealants .................................................................................................................................................................................... 4443
H11.2224 Gaskets..................................................................................................................................................................................... 4544
Miscellaneous Materials........................................................................................................................................................ 4544
H11.2225 H11.2225 Metal Studwork.................................................................................................................................................. 4544
H11.2226 Breather Membrane ............................................................................................................................................................... 4544
H11.2227 Vapour Barrier ......................................................................................................................................................................... 4544
H11.2228 Damp-proof Membrane ........................................................................................................................................................ 4544
H11.2229 Insulation................................................................................................................................................................................... 4545
H11.2230 Standard Plasterboard.......................................................................................................................................................... 4645
H11.2231 Moisture Resistant Plasterboard ........................................................................................................................................ 4645
H11.2232 Impact Resistant Plasterboard............................................................................................................................................ 4645
H11.2233 Foilbacked Plasterboard....................................................................................................................................................... 4645
H11.2234 Fire Resistant Plasterboard ................................................................................................................................................. 4645
H11.2235 External Grade Board............................................................................................................................................................ 4645
Cladding Support Structure................................................................................................................................................ 4645
H11.2236 Supports – All Architectural Steelwork ............................................................................................................................ 4645
Timber........................................................................................................................................................................................ 4645
H11.2237 Timber Generally .................................................................................................................................................................... 4645
H11.2238 Stress Grading of Timber..................................................................................................................................................... 4746
H11.2300 FABRICATION ............................................................................................................ 4846

H11.2301 Fabrication of Walling Systems.......................................................................................................................................... 4846
H11.2302 Structural Glazing................................................................................................................................................................... 4847
H11.2303 Tolerances for Manufacture and Element Fabrication .................................................................................................. 4847
H11.2304 Welding Procedures.............................................................................................................................................................. 4847
H11.2305 Tolerances for Manufacture ................................................................................................................................................. 4847
H11.2306 Tolerances for Component Assembly............................................................................................................................... 4947
H11.2307 Tolerances for Manufacture of GRC Panels ................................................................................................................... 4948
H11.2308 Manufacture for GRC............................................................................................................................................................ 4948
H11.2309 Timber Generally .................................................................................................................................................................... 4948
H11.2400 FINISHES ..................................................................................................................... 5049

H11.2401 Finishes Generally .................................................................................................................................................................. 5049
H11.2500 ANCILLARIES ............................................................................................................. 5049

Lightning Protection and Earth Bonding .......................................................................................................................... 5049
H11.2501 General ..................................................................................................................................................................................... 5049
Fixing Brackets for Blinds .................................................................................................................................................... 5049
H11.2502 General ..................................................................................................................................................................................... 5049
Cradle Restraints.................................................................................................................................................................... 5049
H11.2503 Cradle Restraint Sockets ..................................................................................................................................................... 5049
H11.3000 SITE INSTALLATION...................................................................................... 5149
H11.3100 WORKMANSHIP ........................................................................................................ 5149

H11.3101 Generally................................................................................................................................................................................... 5149

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H11.3102 Blinds Generally...................................................................................................................................................................... 5150

H11.3103 Quality of GRC Finishes....................................................................................................................................................... 5250
H11.3104 Timber Workmanship Generally ......................................................................................................................................... 5250
H11.3200 TOLERANCES ............................................................................................................ 5251

H11.3201 Installation................................................................................................................................................................................. 5251
H11.3202 Site Erection ............................................................................................................................................................................ 5352

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H11 ROOF AND WALL SYSTEMS

To be read in conjunction with Section A and other related sections of the Specification, Preliminaries
and Contract Conditions.
H11.1000 SCOPE, SUBMITTALS, TESTING AND PERFORMANCE
H11.1100 SPECIFICATION AND SCOPE

H11.1101 Descriptive Works
a) For design and general performance requirements, refer to Section A of the Specification.
Specific design and performance requirements are as defined in the particular trade
sections.
b) Complete the Detailed Design, manufacture, supply, install and warrant the works whilst
complying with the visual intent indicated on the Design Drawings and criteria stated in the
Specification.
c) Where no material, product or supplier is indicated in the Specification, propose suitable
materials and systems prior to Contract award which comply with the visual intent and
performance criteria stated and remain fully responsible for the Detailed Design of the works.
d) Where a particular material, product or supplier is indicated in the Specification, such
material, product or supplier shall be deemed indicative representing the Architect’s
design intent only. The Contractor may complete the installation using that product, or such
other confirmed as acceptable by the Architect in writing, but shall remain fully responsible
for the Detailed Design and performance of the works.
H11.1102 Scope of Works
This section of the Specification, when read in conjunction with the Design Drawings, provides
particular requirements with respect to the following:
a) Framing systems.
b) Stick built curtain wall systems.
c) Unitised glazed curtain wall systems.
d) Structural silicone bonded curtain wall systems.
e) Open pattern screens.
f) Shopfront glazing systems.
g) Roofglazing systems.
h) Internal glazing systems.
i) Integrated shading elements.
j) Integrated grilles, louvres and spandrel panels.
k) Integrated opening lights, glazed pivoting/ hinged and sliding doors including all ironmongery.
H11.1103 Interfaces
a) Complete the Detailed Design of all interfaces with adjoining trades prior to commencement of
manufacture.
b) Ensure that all interfaces are fully co-ordinated prior to commencement.
H11.1200 SYSTEM DESCRIPTIONS/TYPES

Souk External Wall Cladding Systems
H11.1201 Type EWS-01 Cladding System

a) Open screen system with various patterns to screens. Screens to be fixed to framing
comprising exposed fabricated stainless steel profiles to full height mullions at skirting level with
concealed fixings/bracketry. Above the skirting level of the full height mullions (8.4m high) to
have precast concrete capping profiles to either side and clad on front and back with GRC to

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match the finish of the precast concrete mullion capping as indicated on the design drawings.
Intermediate mullions between the full height mullions which are suspended above the ground
level are to have aluminium cladding on the corridor side with the front face (external side) of
the mullion capped with a precast concrete profile capping reinforced with stainless steel with
aluminium end caps to the base as indicated on the Design Drawings. Screens to be
manufactured from GRC panels with the required patterns as shown on the design drawings:
b) The system to include precast concrete channel profile at floor levels as shown on the Design
Drawings.
c) Finishes:
i) Stainless steel framing/profiles to have shot peened or brushed finish.
ii) All aluminium to be colour anodised. Colours to be confirmed.
iii) Non-visible framing/metalwork to be stainless steel or to be suitably corrosion protected.
iv) GRC to be self coloured and finished as specified to accepted samples. Colour to be
confirmed.
v) Precast concrete capping profiles to mullions to be self coloured and finished as
specified to accepted samples. Colour to be confirmed. Refer to section E50 for precast
concrete.
d) Pattern variations to screens to be as shown on the Design Drawings.
e) Panels to be set out in a facetted manner as shown on the Design Drawings.
f) Bird mesh/spikes to be discreetly integrated as indicated on design drawings
g) There shall be a sufficient expansion joint between the precast concrete caps and the GRC to
the front and back of the mullion including a suitable sealant. Refer to section Z22 for sealants.

a) Aluminium curtain wall with integrated double glazed units. The system to be faced with
integrated open screen cladding similar to EWS-01 and precast concrete capping profiles to
mullions. The system to comprise:
i) Extruded aluminium framing (steel core and brackets as required) to profiles as shown on
the Design Drawings to support double glazing incorporating gaskets, sealants etc as
required.
ii) Precast concrete capping profiles to mullions to be self coloured and finished as
specified to accepted samples. Colour to be confirmed. Refer to section E50 for precast
concrete.
iii) Double glazing type GL-01.
b) Windows to be electronically openable (30%) for ventilation. The windows shall also have
provision to be key operated to allow them to be fully openable for cleaning/maintenance
purpose and shall be connected to the ‘Building Maintenance System’ (BMS). Windows at
finished floor level are to be electronically openable/closable for ventilation only and connected
to the BMS, but are not to exceed the back line of the mullion or 100mm whichever is the
lesser. Automatically openable/closable windows shall include anti-trap safety measures to
prevent injury in the event that windows close automatically and trap body parts. Provide all
opening actuators, ironmongery, flashings, drips, seals and associated gaskets, fixings and
bracketry as required to complete the installation.
c) All necessary wiring to be concealed.
d) Double glazing to be suited to SSG bonding with black spacers between glass panes.
e) Provide thermal break as shown on the Design Drawings.
f) Open screen system with various patterns to screens. Screens to be fixed to framing
comprising mullions which are to be capped with precast concrete capping profiles reinforced
with stainless steel as indicated on the design drawings, with concealed fixings/bracketry..
Screens to be manufactured from GRC panels with the required patterns as shown on the
design drawings. Refer to section E50 for precast concrete.
g) The system to incorporate insulated spandrel panels within ceiling services void as shown on
the Design Drawings comprising aluminium faced composite panels integrated into the curtain
walling system.

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h) The system to include precast concrete channel profile at floor levels as shown on the Design
Drawings as specified. Refer to section E50 for precast concrete. Provide insulation, fire
separation and seals behind to seal junctions with floor slabs as shown on the Design Drawings
including provision for expansion and all bracketry, fixings and closure pieces as required.
i) Open screen system with various patterns to screens. Screens to be fixed to framing
comprising solid fabricated stainless steel profiles with concealed fixings/bracketry.
j) Finishes:
i) All aluminium to be colour anodised externally. All internal aluminium to be and PVDF
coated, internally. Anodising and RAL colours to be confirmed.
ii) GRC to be self coloured with smooth finished to accepted samples. Colour to be
confirmed.
iii) Refer to section E50 for finish to precast concrete mullion cappings.
k) Pattern variations to screens to be as shown on the Design Drawings.
l) Panels to be set out in a facetted manner as shown on the Design Drawings.
m) Bird mesh/spikes to be discreetly integrated as indicated on design drawings.

a) Cladding system comprising of a solid insulated backing wall system, as specified, with
concealed support framing, fixings/bracketry and with integrated screen cladding similar to
EWS-01. To be fixed into wind post/mullion set into solid wall construction. Provide extruded
aluminium capping piece internally and precast concrete capping profiles reinforced with
stainless steel externally to wind post/mullion, as indicated on the design drawings and in
accordance with the structural engineers documentation. Insulated backing wall system to
include non-combustible insulation within cavity, anodised aluminium panel, all framing
components, bracing, head and base channels, bracketry and fixings, EPDM vapour barrier,
insulation, sealants and packing to ensure a rigid, airtight and watertight installation. Internal
face of system to have double layer of plasterboard.
b) Open screen system with various patterns to screens. Screens to be fixed to framing
comprising solid fabricated stainless steel profiles with concealed fixings/bracketry. Screens to
be manufactured from GRC panels with the required patterns as shown on the Design
Drawings:
c) The system to include precast concrete channel profile at floor levels as shown on the Design
Drawings. Refer to section E50 for precast concrete. Provide insulation, fire separation and
seals behind to seal junctions with floor slabs as shown on the Design Drawings including
provision for expansion and all bracketry, fixings and closure pieces as required.
d) Where required, as shown on the Design Drawings, the system is required to comprise screen
cladding similar to EWS-01 but facing blockwork construction. Where this ocurs, the GRC
panels are required to be fixed to wind posts set within the block wall. Refer to the Design
Drawings for details of wind post requirements.
e) Finishes:
i) All aluminium to be colour anodised externally and PVDF painted internally. All internal
aluminium to be PVDF coated,. Anodising and RAL colours to be confirmed.
f) Pattern variations to screens to be as shown on the Design Drawings.
g) Backing wall system to incorporate concealed metal stud/framework and be lined either side
with breather water/vapour layer as one membrane to outer face (ie behind the screen).
h) Panels to be set out in a facetted manner as shown on the Design Drawings.
i) Bird mesh/spikes to be discreetly integrated as shown on design drawings.
j) Refer to section E50 for precast concrete.

a) Metal framed cladding system with integrated double glazing and a cast aluminium panel. The
system to comprise:
i) Glass retaining framing: Aluminium and steel, thermally broken frames forming support for
glazing.
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ii) Glazing: Double glazing (type GL-01) to form shapes as shown on the Design Drawings.
iii) Metal panels: cast aluminium panel with PVDF bronze coloured finish internally to suit
required shape as shown on the design drawings.
iv) Coloured Glazing: Coloured drawn glass in shapes as shown on the drawings
b) The multi layered panelled, glazed and framed system is to be ’'sandwiched’ togetherintegrated
into a sub-framing system to match framing system to EWS-01A as shown on the Design
Drawings. Sub-framing to comprise of extruded aluminium/steel profiles with concealed
fixings/bracketry.
c) Finishes:
i) All external aluminium to be colour anodised. All internal aluminium to be PVDF coated,
.manufactured by ‘Kynar’ or acceptable equivalent. Glass colours, RAL colours and
anodising colours to be confirmed.
ii) Non-visible framing/metalwork to be stainless steel or suitably corrosion protected.

As type EWS-01 but with composite timber/stainless steel mullions and frames and timber screens
as in IWS-01. Timber to be suitable for local external conditions.
H11.1207 Type EWS-07 Walling System

External walling system with aluminium and timber framed double glazing as type EWS-02 except:
a) Main framing supporting double glazing to be solid hardwood and stainless steel composite as
type IWS-01 with an aluminium/timber composite transom.
b) Hardwood species to be confirmed. Hardwood species shall be suitable for local external
conditions.
c) Open screen system with various patterns as screens to IWS-01.
d) Double glazing type to be GL-01
e) Windows to be electronically openable (30%) for ventilation. The windows shall also have
provision to be key operated to allow them to be fully openable for cleaning/maintenance
purpose and shall be connected to the ‘Building Maintenance System’ (BMS). Windows at
finished floor level are to be electronically openable/closable for ventilation only and connected
to the BMS, but are not to exceed the back line of the mullion or 100mm whichever is the
lesser. Automatically openable/closable windows shall include anti-trap safety measures to
prevent injury in the event that windows close automatically and trap body parts. Provide all
opening actuators, ironmongery, flashings, drips, seals and associated gaskets, fixings and
bracketry as required to complete the installation.
f) All necessary wiring to be concealed.
g) Finishes:
i) Timber main framing and screens to be as type IWS-01.
ii) Non-visible framing/metalwork to be stainless steel or suitably corrosion protected.
iii) Aluminium to be colour anodised.
h) Pattern variations to screens to be as shown on the Design Drawings.

As type EWS-03 but with timber/stainless steel composite mullion and timber screen with timber
panel behind as shown on the design drawings.
Types of timber species to be confirmed. To be suitably treated as required for external use to suit the
local conditions.
H11.1209 Type EWS-18 Temporary Cladding system.

Temporary insulated aluminium cladding panels to façade that will connect to Khalifa Bridge.
a) Insulated aluminium cladding panels with plasterboard lining with vapour barrier.
b) Aluminium to be colour anodised. Colour to be confirmed by CA
c) To include metalwork framing, braces, bracketry, fixings, head and base channels. To be
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suitable corrosion protected.

d) Panels are to be airtight and watertight as shown on the design drawings.
Roofglazing Systems
H11.1240 Type RFL-01 Roofglazing System

a) Roof glazing system comprising monopitch double glazing (falling diagonally) fixed to a
panellised shading system with integral insulated guttering incorporating a solid insulated kerb
to 4 sides and movement joints as shown on the Design Drawings. The rooflight units shall be
spanning between and fixed to the primary structure. Refer to the Structural Engineer's
Drawings and Specification for requirements for the primary structure. Refer to the Design
Drawings, Clause H11.1402 and the Structural Base Building Report for movement
requirements the roofing system must accommodate.
b) Double glazing to be structural sealant (SSG) bonded to the base aluminium framing.
c) The aluminium framing to comprise thermally broken frames for SSG bonding of glass units
(with carrier frames as required to suit unitising).
d) Double glazing to comprise safety glass Type GL-10 as specified.
e) Panels to comprise either fixed panels or opening panels as required (40% openable). Opening
vents to be vertical push up type and be electrically operated and connected to the B.M.S.
Provide all opening actuators, ironmongery, flashings, drips, seals and associated gaskets,
fixings and bracketry as required to complete the installation.
f) Opening mechanism to be automatically deployed in response to surface solar gains in excess
of threshold value.
g) All necessary wiring to be concealed.
h) The system to include integral solar shading (SHD-01) as follows and as specified below:
i) Open grid unitized panels comprising extruded aluminium profiles as shown on the
Design drawings. Aluminium to be PVDF paintedPVDF coated. Colour to be confirmed by
CA.
ii) The solar shading to form a part of the unitised panels.
iii) Panels to incorporate stainless steel guttering profiles as shown on the Design Drawings.
i) All external aluminium to be colour anodised. All internal aluminium to be PVDF coated. Non-
visible framing to be suitably corrosion protected.
j) The roof glazing system is required to interface with the façade/cleaning system. Refer to the
façade/access maintenance and equipment works package. Provide any bracketry, fixings,
cleats, channels etc, and all interfaces as required.

As type RFL-01 but with /coloured glass (type GL-11) and without shading device.
i) Contractor to be responsible for ‘street roof’ support structure and gutter support
structure as shown on the design drawings.
H11.1242 Type RFL-03A Roofglazing System

Double glazed (curved profile) rooflights set into vaulted roof system, refer to section L10:
H11.1243 Type RFL-03C Roofglazing System Coloured glass lens set into vaulted roof system, refer to section
L10:
Coloured glass lens set into vaulted roof system, refer to section L10:

a) Inclined roof glazing system fixed to the support structure which is spanning between and fixed
to the primary structure. Refer to the Structural Engineer's Drawings and Specification for
requirements for the primary structure.
b) The rooflight panels to comprise thermally broken aluminium frames supporting glazing with
aluminium cappings or with flush SSG bonding to frames as shown on the Design Drawings.

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c) The rooflight system to be double glazed with clear safety glass Type GL-10 as specified with
reinforced, insulated colour anodised aluminium panels and opaque glass at perimeter
conditions.
d) Panels to comprise fixed panels.
e) The system to include solar shading (SHD-04) as follows:
i) Retractable fabric blinds as specified.
ii) Fabric blinds to be electronically operated as specified and linked to B.M.S.
f) Panels to integrate with stainless steel guttering profiles and drainage outlets as shown on the
Design Drawings. Interface with M&E specification for drainage requirements.
g) All external aluminium to be colour anodised. All internal metalwork to be PVDF coated. Non-
visible framing to be suitably corrosion protected.
h) The roof glazing system is required to interface with the façade/cleaning gantry system. Refer to
the façade/access maintenance and equipment works package. Provide any bracketry, fixings,
Internal Walling Systems
H11.1261 Type IWS-01 Internal Walling System

a) Main framing to comprise composite solid hardwood and factory painted mild steel to profiles
shown on the Design Drawings. Refer to section G10 for finishes to steel. Framing to be fixed
to the primary structure as shown on the Design Drawings.
Open screen system with various patterns to screens. Screens to be fixed to main framing with
concealed fixings/bracketry. Screens to be formed from hardwood jointed to form the various
screen patterns. .
b) Provide hardwood handrail to profile shown on the Design Drawings. Handrail to have clear
durable lacquer/stain finish with a ‘natural’ visual appearance to match timber elements of
cladding systems..
c) Incorporate side guide rails for automatic smoke curtains to screens in locations where
indicated on the smoke control systems drawings.
d) Finishes:
i) Timber frame and screen finishes. Refer to clause H11.2401
i)Timber to have natural finish.
ii) Non-visible framing/metalwork to be stainless steel or suitably to be corrosion protected.
e) Pattern variations to screens to be as shown on the Design Drawings.
f) Alternative cost option: Hardwood veneer panel on solid MRMDF core with engraving as shown
on the design drawings.

Internal walling system with screens and backing wall system as type EWS-03, but with timber/steel
composite mullion and timber screen with timber panel behind as shown on the design drawings. or
screen as type EWS-03 with blockwork substrate, except:
a) Main framing supporting backing wall to be solid hardwood as type IWS-01.
b) Open/solid screen system with various patterns as screens to IWS-01.
c) Alternative cost option: Hardwood veneer panel on solid MRMDF core with engraving as shown
d) Finishes:
i) Timber finishes. Refer to clause H11.2401
i)ii) Timber main framing and screens to be as type IWS-01.
ii)iii) Non-visible framing/metalwork to be stainless steel or suitably to be corrosion protected.
e) Pattern variations to screens to be as shown on the Design Drawings.
f) The system is required to form an internal walling system and is not required to be weathertight.

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Bronzed anodised aluminium framed internal walling system with bronze extrusion handrail and cast
aluminium infill panels. System to comprise as follows:
i) Metal panels: cast aluminium panel with bronze coloured PVDF paintedPVDF coated
finish manufactured by ‘Kynar’ or acceptable equivalent to suit required shape as shown
ii) The system is required to form an internal walling/balustrade type system and is not
required to be weathertight.
iii) Pattern variations to be as shown on the design drawings.

Double glazed internal walling system to vertical circulation void at basement as follows:
a) Laminated safety glass as type GL-01 with a sheet of textured, coloured drawn glass.
b) System to include extruded aluminium glass retaining frame and mullions.
c) Aluminium to be colour anodised – colour to be confirmed by CA.
d) Non-visible metalwork to be stainless steel grade 1440.1 or suitable corrosion protected mild
steel.
e) Allow for colour anodised aluminium linear air grille to be integrated as shown on the design
drawings.
f) Back painted glass panel as shown on the design drawings.
g) Insulated aluminium extrusion spandrel which will be colour anodised. Colour to confirmed by
CA.
h) Make provision for electronically operable panel as indicated on design drawings.
Shading Devices
H11.1271 Type SHD-01 Shading Device

a) Extruded aluminium gridded shading device forming a part of unitised panels as specified
above. Finish to be PVDF paintedPVDF coated. Colour to be confirmed by CA.
b) Shading panels to be hinged or demountable for access to glazing.

a) Aluminium shading system forming a sliding screen system of insulated aluminium profiles with
reinforced, insulated, colour anodised aluminium panels, louvers and grillages to perimeter
conditions for ventilation in accordance with the M&E documentation as shown on the Design
Drawings.
b) Aluminium to be colour anodised.
a)Aluminium shading system forming a sliding screen system of insulated aluminium profiles as shown
on the Design Drawings.
b)c) The shading system to be electronically operated as specified and linked into the BMS for
automatic operation.
c)d) Provide supports/bracketry as required and as shown on the Design Drawings.
d)e) To be fixed to the primary structure as indicated on the structural engineers drawings.
f) Shading Device to integrate with stainless steel guttering profiles and drainage outlets as
shown on the Design Drawings. Interface with M&E specification for drainage requirements.
g) The shading device is required to interface with the façade/cleaning gantry system. Refer to the
façade/access maintenance and equipment works package. Provide any bracketry, fixings,

Retractable motorised fabric blinds as specified and associated with roof glazing system RFL-04.
Glass Doors

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H11.1281 Type EDR-01 Bronze Doors

Bronze framed doors with extruded bronze framing and bronze solid panels with engraving as shown
on the design drawings (refer to section Z11 for bronze engraving and general metalwork), with
pivoting or hinged manual operation. Door system to include door leaves and frames and all
ironmongery/operating mechanisms, and shall be integrated in the adjacent walling type.
H11.1282 Type EDR-02 Bronze Doors

Bronze framed doors with extruded bronze framing, double glazing with pivoting or hinged operation.
Door system to include door leaves and frames and all ironmongery/operating mechanisms, and shall
be integrated in the adjacent walling type. Door to be power operated or fully automatic in
accordance with BS 7036 Part 5.
H11.1284 Type EDR-04 Aluminium Doors

Aluminium framed doors with extruded aluminium framing, double glazing with pivoting or hinged
operation. Door system to include door leaves and frames and all ironmongery/operating
mechanisms, and shall be integrated in the adjacent walling type. Door to be power operated or fully
automatic in accordance with BS 7036 Part 5.
H11.1300 SUBMITTALS AND TESTING

Tender Submittals
H11.1301 Tender Response

a) Provide Tender submittals in accordance with the requirements of Section A.4000 of the
Specification.
b) Submit a design response with the Tender proposal, to include all profiles of typical conditions,
with dimensions.
c) The Tender design response shall include:
i) Pre-contract Design proposals including comprehensive technical specifications of the
Contractor's Proposals.
ii) Full details of systems, materials and suppliers where different from those specified.
iii) Method statements for installation for all cladding types.
iv) Predicted service life data.
v) Specification/ Technical details of glass proposed including surface modified glass data,
colour rendering indices, etc. as specified.
vi) Details of proposals for glass door mechanisms.
vii) Outline risk assessment statement for all glazing systems.
viii) Samples where specified.
ix) List of Tests included.
x) QA/QC programme.
xi) List of proposed Working Drawings.
xii) Summary of deviations from the Specification.
xiii) Outline technical specifications reflecting proposed materials/systems, etc.
xiv) A list of proposed suppliers and sub-contractors intended to be used.
Samples, Mock-ups, Prototypes and Quality Benchmarks
H11.1302 Pre-contract Samples

Provide 4 pre-contract samples of each of the following in accordance with Section A.4000,
including trade literature and technical specifications:
a) 300mm length of stainless steel framing with proposed finish (both wall and door framing).
b) 300mm length of composite timber and stainless steel framing with proposed finish (both wall
and door framing).
c) 500mm x 500mm cruciform sample panel of glazed curtain walling type EWS-02 including

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extruded aluminium mullion and transom and double glazing set into framing with gaskets with
proposed finish.
d) 300mm x 300mm x 50mm block sample of timber for timber screens.
e) Samples of bronze panels with prepatinated finish and steel with brass coating 300mm x
300mm.
f) 4 sets of samples in 3 different colours (ie 12 samples in total) of GRC comprising 300mm x
300mm block samples with proposed finish.
g) 300mm x 300mm sample of aluminium sheet cladding.
h) 300mm sample of timber balustrade.
i) 300mm x 300mm sample of solar shading device with fabric.
j) All proposed gasket types, extrusions, etc. including at least one joint.
k) Operating mechanisms for roof openings.
l) Glass samples 300mm x 300mm of all proposed glass types.
m) Proposed types of finish.
n) Ironmongery.
o) Switches and controls.
p) 300mm length of hardwood to be used. (Nyatoh or acceptable equivalent)
H11.1303 Post Contract Samples

Provide 4 post contract samples of each of the following in accordance with Section A.4000:
a) 500mm length of stainless steel framing with proposed finish (both wall and door framing).
b) 500mm length of composite timber and stainless steel framing with proposed finish (both wall
and door framing).
c) 500mm x 500mm cruciform sample panel of all glazed curtain walling type EWS-02 including
extruded aluminium mullion and transom and double glazing set into framing with gaskets with
proposed finish.
d) Samples of bronze panels with prepatinated finish 500mm x 500mm.
e) 3 full size samples of GRC screen panel with each type of open pattern in 3 different colours
with proposed finish.
f) 500mm x 500mm samples of timber screens (each type of pattern) with proposed finish.
g) 500mm x 500mm sample of aluminium sheet cladding.
h) 500mm sample of timber balustrade.
i) 300mm x 300mm sample of solar shading device with fabric.
j) Metal louvres of all types.
k) 500mm length of timber and track used for shading device screen.
l) All proposed gasket types, extrusions, etc. including at least one joint.
m) All colour types samples 300mm x 300mm minimum size.
n) Operating mechanisms for roof openings.
o) Sliding operating mechanisms, track and wheels.
p) Switches and controls.
q) Glass samples 500mm x 500mm of all specified glass types.
r) Various extrusions at least 300mm in length.
s) Various bolts and exposed fixings.
t) Various ironmongery including hinges, budget locks and window and door handles.
u) Samples of fastening devices and anchors, etc.

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v) 300mm length of hardwood to be used. (Nyatoh or acceptable equivalent)

w) Samples of engraving. To show quality and finish of final engraving standard for acceptance by
the CA.
H11.1304 Mock-up Requirements

Provide mock-ups in accordance with Section A.4000 as follows:
Refer to the Mock-up Drawings.
H11.1305 Prototype Requirements

Provide prototypes in accordance with Section A.4000 as follows:
a) Prototypes for project specific testing as follows:
i) Provide wall systems prototype. 2 structural bays 5.6mx10.5m high including stack joint.
Refer to architectural drawings for location.
ii) Provide roof systems prototype. 2 structural bays approximately 5600mmx3500mm
including integral gutter which runs in between bays and at sides.
b) A purpose made rig will be required for testing purposes as necessary. For details of required
prototype test scope, refer to the Tender Drawings. Details of test including testing rig to be
submitted for review by the Architect.
H11.1306 Benchmark Requirements

Provide quality benchmarks in accordance with Section A.4000:
a) First completed full height structural bay of each type of system in location to be agreed.
Testing
H11.1307 Previous/ Comparative Testing Certification

a) The Contractor may provide certification to demonstrate that the cladding works have been
previously tested to meet the criteria specified.
b) Where previous testing data is not representative of the project specific requirements or is not
deemed to be satisfactory by the Architect, laboratory tests shall be carried out to satisfy the
requirements of the Specification.
c) Test certificates do not relieve the Contractor of his responsibilities regarding the performance
and service life requirements of the cladding works.
H11.1308 Testing of Prototypes

a) Supporting Frames: The prototypes shall be mounted in test rigs which have the same
conditions of attachment and support as elements of the works, with a supporting structure
similar in stiffness to that supporting the works. The prototypes to be tested shall not be
influenced by the test chamber.
b) Provide details of all jointing, sealing and glazing techniques, materials used, type, number and
size of drainage/ventilation apertures and section properties of the framing members.
c) The Architect shall be given at least 7 days notice prior to the erection and dismantling of the
prototype construction, as the Architect may elect to observe the assembly and dismantling of
the test prototypes.
d) Tests shall not be carried out without prior notice of at least 7 days being given to the Architect.
e) Prior to testing, sufficient time shall be allowed to permit all chemically curing sealants to
achieve their proper cure as recommended by the sealant manufacturer.
f) Before the test is begun, the external face of the specimen shall be thoroughly washed using a
mild additive-free detergent and then rinsed.
g) Testing shall be carried out by an independent laboratory acceptable to the Architect.
h) The prototypes shall be tested for air permeability, water leakage, and wind load resistance,
plus additional structural loading tests as necessary to demonstrate through
calculations/drawings that the works are capable of accommodating the building movements
without degrading the performance of the works.
i) Details of the testing procedures shall be provided to the Architect for review and comment.

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H11.1309 Standard Test Apparatus and Calibration

Submit details of the following equipment intended for use in the testing process:
a) Test chamber.
b) Air system.
c) Water spray system.
d) Pressure measuring apparatus.
e) Airflow-metering system.
f) Water flow-metering system.
g) Deflection measuring devices.
h) Calibration.
i) Seismic test.
H11.1310 Air Permeability Tests

a) The prototypes shall be tested to determine the air infiltration per unit area for fixed panels, and
per unit joint length for any opening lights. A check for regions of concentrated air leakage shall
be made after the air permeability test has been completed and such areas marked upon the
prototype drawings.
b) Testing shall be carried out in accordance with BS EN 12153, for cladding, and BS EN 1026,
for windows and doors, to a test pressure class of 600 Pa as defined in BS 6375 and the
requirements of the CWCT Standard for Systemised Building Envelopes.
c) In addition, an air ex-filtration test shall be carried out on the prototype to check the
performance in relation to the whole building's air leakage test requirements, in accordance with
the requirements of the CWCT Standard for Systemised Building Envelopes and to meet the
criteria required by Local Building Regulations.
H11.1311 Façade Floor Air Leakage Testing. (To be confirmed by CA)

a) The joint between the façade cladding and the structural slab at each floor level shall be sealed
such that air shall leak through the façade floor joint at no more than 0.1 litres/sec. per linear
metre of façade at 50N/m².
b) The façade floor joint air leakage testing shall be carried out on Site by a specialist laboratory
such as CERAM, Taywood or BSRIA.
c) Allow for the testing of up to 10 sections of façade, each section comprising the building
module of façade. The test sections shall be selected by the Architect. If the test fails, locate
the leak, seal it and retest the section until the test is passed. If more than two tests fail, a
further 10 sections of façade shall be re-tested.
H11.1312 Weatherproofing and Watertightness Tests

a) Tests shall be carried out adopting both the static and the dynamic procedures set out below:
i) Static Test Method carried out in accordance with BS EN 12155, for cladding, BS EN
1027, for windows and doors, and the requirements of the CWCT Standard for
Systemised Building Envelopes for the static test method.
ii) Dynamic Test Method carried out in accordance with the requirements of the CWCT
Standard for Systemised Building Envelopes or equivalent European Standard ENV
13050, for testing for water penetration using the dynamics method.
iii) Resistance to water penetration when tested shall be in the test pressure class 600 Pa or
0.25 the design wind pressure, whichever is the greater, in accordance with the
requirements of the CWCT Standard for Systemised Building Envelopes for testing for
water penetration by the static and dynamic test method.
b) Performance under Testing:
i) There shall be no leakage into the internal face of the works at any time during the test or
within 15 minutes of completion of the test.
ii) At the completion of the test there shall be no standing water in locations intended to
drain.

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H11.1313 Wind Resistance Tests

a) A serviceability test shall be carried out in accordance with BS EN 12179, for cladding, and BS
EN 12211, for windows and doors, as modified by the CWCT Standard for Systemised
Building Envelopes.
b) A safety test shall be carried out in accordance with the CWCT Standard for Systemised
Building Envelopes.
c) Test pressure: The peak test pressure shall be 1.5 times the design wind pressure for the
‘Safety’ test, and 1.0 times the design wind pressure for the ‘Serviceability’ test.
d) Performance under Testing:
i) At both positive and negative applications of the peak test pressure, there shall be no
permanent damage to framing members, glass or glazing panels or anchors. Framing
members shall not buckle, panels shall remain securely held, glass and glazing shall not
be damaged and gaskets shall not be displaced. The glass itself shall not deflect such
that edge cover is insufficient to restrain the glass under peak test pressure or such that
spacers become visible.
ii) After loading to the positive and negative peak test pressure, permanent deformation to
wall framing members shall not exceed 1/500 of the span measured between points of
attachment to the building one hour after the loading has been removed.
iii) Refer to clause H11.1403 for maximum allowable deflections for glass retaining framing
sections. The glass itself shall not deflect such that edge cover is insufficient to restrain
the glass under peak test pressure or such that spacers become visible.
iv) The loads created by specified test conditions shall be accommodated safely, without
detriment to the overall design, structural integrity and performance of the works.
v) The permanent fixings of any component shall be capable of resisting the combined dead
load and maximum wind load with the required factor of safety in accordance with the
CWCT Standard for Systemised Building Envelopes and as appropriate to the relevant
materials used.
e) Tests shall also verify:
i) That all components shall return to their original positions under zero load, providing that
the elastic limit to the materials has not been exceeded.
ii) That in all cases, the deflection of members shall not exceed specified tolerances.
iii) That anchorage shall not show permanent signs of slackening off. The deflection of these
members shall not be sufficient to damage non-loadbearing member of the inner wall
assembly.
iv) That no noise shall occur due to movement of components.
H11.1314 Impact Testing

A soft body impact test shall be carried out in accordance with BS 8200, conforming to category B
requirements (See table 2).
H11.1315 Off-Site Test Sequence

a) The Testing Authority shall witness the installation and dismantling of the prototypes, record any
variations to the agreed details on a set of the prototype assembly drawings prepared by the
Contractor and shall also record the extent of water penetration into the system.
b) Test Sequence:
i) Preliminary testing: Prior to the full test sequence, the prototypes shall be pre-tested
under static pressure at 50% maximum design wind load, followed by water penetration
test at 50% of the pressure specified for final tests. Deficiencies observed in the samples
during testing shall be recorded, and appropriate corrections made.
ii) The testing sequence shall be followed in accordance with the CWCT Standard for
Systemised Building Envelopes Sequence B procedures.
iii) Further tests shall be carried out in accordance with the CWCT Standard for Systemised
Building Envelopes Discretionary Test procedures as necessary.
c) No test shall be carried out unless all previous tests in the sequence have been passed to the

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satisfaction of the Testing Authority.

d) If any modification is made to the prototype, repeat testing shall be undertaken as detailed in
the relevant CWCT procedures. However, If any modification is undertaken that, in the opinion
of the independent testing authority or witness, invalidates earlier test results, the sequence
shall commence again at the first test. This requirement is not applicable to glass breakage
during the wind resistance safety test when replacement of a pane of glass may be carried out
without re-starting the whole sequence.
H11.1316 Acoustic Testing – Initial Advance Test

a) Identify the glass configurations and incorporate any acoustically enhanced configurations that
may be necessary to meet the Specification.
b) Immediately following the appointment of the curtain walling sub-contractor, arrange laboratory
acoustic tests of the proposed glass configurations using similar framing to that intended with
similar dimensions and mass per metre run of framing. These prototypes will not be used as
visual samples and will not include glass coatings or heat treatments, but are to be used to
confirm compliance with the specified acoustic data.
c) From initial results of acoustic testing, provide detailed acoustic assessment of each cladding
type for review.
H11.1317 Structural Silicone Testing and Maintenance

a) General:
i) Comply with the requirements of the Specification with respect to the testing of the
structural silicone application.
ii) Provide the Architect with documentary evidence that the selection of sealant takes into
account any relevant recommendations by the sealant manufacturer as to the use of the
sealant.
iii) Compatibility: Submit to the Architect test certificates to confirm compatibility of the
sealant used with all substrate materials including aluminium, finishes, glass, glass
coatings, gaskets, setting blocks, backing rods, etc. These certificates shall relate to tests
carried out by the sealant manufacturer.
b) Submit to the Architect adhesion test data of production samples as tested in accordance with
ASTM C 794. These shall establish adhesion performance over the temperatures specified in
the Specification.
i) Where the structural silicone bonds glass to the cladding framework, the weakest
element in the line of stress shall have a minimum strength of 600kPa or 6 times the
design strength, whichever is the greater in accordance with ETAG 01/015 or ETAG 002
documents which set out the requirements for use of structural silicone. This criterion
shall be proven with a statistical confidence of 99%. For each combination of substrate
and design conditions, provide a report from the sealant manufacturer for the tests
performed in the following manner:
ii) Assemble and fully cure under production conditions (not laboratory conditions) a
minimum of 12 samples. Each sample shall be a minimum of 150mm long. The sample
shall be made of actual substrate material, i.e. glass with actual coating (low E and/or
fritting), aluminium sections with finishes, etc. The joint geometry shall be accepted by the
Architect.
• Double-sided tape or other spacer material shall be installed such that it does not
add to the silicone joint strength.
• Weather seals shall not be installed on the samples.
• After full cure the samples shall be totally immersed in tap water at room
temperature for 7 days.
• Samples shall be tested in a tensometer 25 hours after removal from the water
immersion tank.
• Each sample shall be subjected to a tensile load test. The crosshead speed shall be
50mm per minute. Continue testing until failure occurs or until 830kPa or 6 times
the design load, whichever is the greater, is applied to the samples. Report the
maximum stress and mode of failure including percentage area of cohesive failure
and any area of voids in the sealant for each sample. Adhesive failure area or void

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cross section area parallel to the substrate face greater than 20% is unacceptable.
• A statistical analysis of results shall indicate a design stress of not less than 600kPa
or 6 times the design stress of the sealant, whichever is the greater, with a
confidence of 99% over the temperature range as described in the Specification.
• If the sample set does not meet the requirements of the above criteria, the design of
the failed element shall be revised and subjected to a re-test. This procedure shall
continue until the above requirements have been met.
• Prepare a report of the above testing. No fabrication shall commence until the
results have been accepted by the Architect.
• Retain all test results with regard to the structural silicone glazing for a minimum
period of 15 years from project completion. These shall be made available to the
Architect on request.
c) Maintenance:
i) Recommend a periodic maintenance regime for acceptance by the Architect. This shall be
incorporated into the O&M manual. Recommendations shall include:
• Cleaning: Specify acceptable detergents, etc. and methods to be used.
• Details and frequency of close visual inspection requirements, including materials to
be employed.
• Inspection: Provide forms to be filled out periodically, each pre-dated with the
inspection date and an adequate quantity for the design life of the building. The
form shall state the full procedure for the inspection.
• Recommendations for periodic cut-out of structural seals and weather seals (if
appropriate) to check shore hardness and tensile properties of the seal.
ii) Each of the properties shall clearly state pass/fail criteria and indicate action required
when a failure is obtained as a result.
H11.1318 Site Hose Testing

A Site water hose test shall be carried out in accordance with the recommendations of the CWCT
Standard for Systemised Building Envelopes. Minimum area to be tested shall be 5%.
H11.1319 Testing of Fixings

As the work proceeds, allow for the bolts to be proof load tested as required and witnessed by the
Structural Engineer. All in accordance with BS 8080.
H11.1320 Thermal Cycling Tests

Not required.
H11.1321 Building Movements/Racking Procedure Tests

a) Carry out building movements/racking tests as follows:
i) Position – double floor height prototypes with racking applied to central floor.
ii) Number of cycles: 5 cycles in each direction.
iii) Magnitude: Refer to the Structural Engineer’s Specification in respect of seismic
requirements (Note seismic zone ** applies).
b) Following the building movement procedure carry out air permeability tests and static water
tests in accordance with the CWCT Standard for Systemised Building Envelopes as referred to
in earlier testing clauses.
H11.1322 Discretionary Tests - Screen Cladding – Noise and Vibration

a) Undertake tests and demonstrate to the acceptance of the Architect with regard to the
following aspects of the design of the screen cladding:
i) The works shall not vibrate so as to cause noticeable noise or vibration including
transmission to other elements of the cladding or into the building frame.
ii) The flow of wind over the works shall not cause significantly audible noise effects from
wind flow, including transmission to other elements of the cladding or into the building

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frame.
iii) Specialist advice should be sought to support the Contractor’s Proposals.
b) Three principal areas of the screen and associated elements require consideration:
i) General areas.
ii) Areas around windows or other similar openings.
iii) The topmost screen section of the façade.
c) Tests shall include wind tunnel testing at an approved independent laboratory. For noise tests a
suitable test facility shall be used, which enables wind noise from the wind generation system to
be excluded. Mock-ups used shall be full size using elements representative of the final static
and dynamic behaviour and shall be oriented through a range of angles of incidence to the wind
flow to ensure that all wind flow scenarios have been considered. The ‘site reference pressure’
shall be taken as specified.
d) Wind tunnel tests shall be carried out on the building model to assess various effects. The full
report shall be available for inspection, if required.
H11.1323 Fire Tests

a) Where required, carry out fire tests to comply with the fire Strategy Report and the relevant
NFPA Standards, BS or EN in addition to any Abu Dhabi Civil Defence local requirements as
applicable.
b) The impregnation of any fire treatment to hardened softwood, such as acetylated wood and
terminally strengthened wood, should be tested by the supplier to demonstrate that the
absorption capacity has not been reduced too much during their treatment.
c) Products tested to meet BS or EN standards may be acceptable subject to acceptance by the
Architect.
d) All tests to be carried out by an accredited testing lab acceptable to the Architect.
H11.1324 Results and Certificates

a) Tests and inspection results shall be submitted immediately they are available.
b) Submit certificates relating to the materials used in the work as confirmation of tests carried out
in accordance with the relevant British Standards, and/or other national standards as
appropriate.
c) Maintain, until the end of the defects liability period, records of all inspections and tests
performed, material certification, inspection and test plans, drawings, and any other
documentation to substantiate conformity with the Specification, including those carried out by
sub-contractors.
d) The records shall be stored in such a way that they are identifiable to the component to which
they refer and are retrievable.
e) The records shall be available for inspection by the Architect and copies of records shall be
given to the Architect upon request. At the end of the defects liability period they shall be
submitted to the Architect.
H11.1400 PERFORMANCE REQUIREMENTS

General
H11.1401 General
a) Comply with the general performance of Section A.5000 and the following specific
performance requirements.
b) The works generally shall be designed, constructed and installed to BS 8200 and the
recommendations of the CWCT Standard for Systemised Building Envelopes.
c) Inclined overhead glazing shall comply with the requirements of the CWCT Standard for
Systemised Building Envelopes.
Structural Performance
H11.1402 Specific Movements

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a) For details of structural movements and tolerances to be accommodated by the façade and roof
systems, refer to the Structural Movements and Tolerances Report and the Structural
Engineer's Structural Base Building Report specification and drawings as applicable and as
prepared by the Structural Engineer.
b) Design façade and roofing systems to accommodate the following structural movements:
i) Vertical differential deflection (floor to floor).
ii) Horizontal and vertical differential movement (floor to floor).
iii) Horizontal differential movement of roof systems.
iii)iv) Horizontal movement (long term shrinkage).
iv)v) Column shortening.
v)vi) Building sway.
vi)vii) Seismic sway.
c) Where curtain walling is continuous over more than one floor, provide a horizontal stack joint to
accommodate vertical building movement.
H11.1403 Deflections
a) The allowable deflection of any glazed element of the works, when carrying full design loads,
shall comply with BS 6262 as applicable.
b) Unless otherwise specified, the maximum allowable deflection for any general framing members,
panels, glass components shall be in accordance with the requirements of the CWCT Standard
for Systemised Building Envelopes and all relevant standards as applicable.
c) The allowable deflection of any element of the inclined overhead glazing assemblies, when
carrying full design loads, shall be in accordance with the recommendations of BS 6262, BS
5516: Parts 1 and 2 and the Centre for Window Cladding Technology (CWCT) Standard for
Systemised Building Envelopes as applicable.
d) The works shall not deflect under loading in any way that is detrimental to any element of the
works or adjacent structural or building elements.
e) All components, couplings and fixings shall be capable of accommodating all of the above
deflection without permanent distortion, deformation or failure.
f) The works shall accommodate defined differential structural movements arising from any loads
imposed by adjacent structures.
g) The magnitude of the allowable deflections shall be reduced if they are detrimental to any part
of the works, their support structure or internal finishes.
h) Calculations of deflections for structural aluminium shall recognise criteria contained in BS
8118: Part 1 limiting deflections.
H11.1404 Design Loads
a) The system shall be designed to withstand the loads as specified below without affecting the
system’s ability to meet the specified performance requirements and/or the exceptional loads
specified herein. Unless otherwise stated, the system shall also be designed to comply with all
prevailing relevant British Standards as appropriate, including, but not necessarily limited to BS
6180 and BS 6399.
b) When calculating design loads the worst combination shall be considered, taking account of
the fact that the pressure coefficients at various locations may determine more than one design
criterion.
c) Self-weight Gravity Loads: The works shall be capable of accommodating the self-weight of the
system including all of its framing and supporting system.
d) The Glazed Curtain Walling/ Cladding Systems shall be designed so that failure of any one
local element (e.g. bolt, anchor, of fixing component) will not result in progressive failure of the
curtain wall/ cladding.
e) Cast-in Inserts: Design to resist worst load combinations. For proprietary inserts, design to
manufacturers requirements.
H11.1405 Seismic Loads

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The system to be designed to withstand the relevant seismic activity to comply with UBC97 – Unified
Building Code-USA-Division III-V. The AAMA-501-4 seismic user class to be operational.
H11.1406 Imposed Gravity Loads

The works shall be capable of accommodating loads imposed by adjacent and/or attached elements
that bear onto, are suspended from or fixed to the system. Ensure that where curtain walling/framing
systems are required to support GRC panels, that the dead load of the GRC is fully accommodated
in the design of the curtain walling/framing system. Refer to the Design Drawings for information on
such elements and/or required load capacities. No elements from other trades shall be fixed to and/or
supported by the curtain wall, unless accurately specified, indicated on the Design Drawings and/or
agreed by the Architect.
H11.1407 Live Loads

a) The works shall be capable of accommodating the following live loads without any reduction in
performance:
i) All loads resulting from movements of the building structure and cladding support
structure.
ii) Horizontally imposed loads in accordance with BS 6180 and BS 6399: Part 1 for all
relevant conditions and in compliance with Local Building Regulations including
requirements for containment (where balustrade loading is required).
iii) Façade projections to withstand maintenance loads without dislodgement or permanent
deformation.
iv) Horizontally applied loads acting on the surface of framing members and glazing arising
from maintenance and cleaning operations. The works shall sustain safely, without
reduction in performance and without permanent deformation to any component, a static
500N load applied horizontally through a square of 100mm sides on any part of the
framing.
v) Known impact loads, or transferred impact loads, that occur during its service life, without
deterioration in performance and without sustaining non-repairable damage.
vi) Loads imposed during replacement of panels/units.
vii) Wind loads.
viii) Horizontal and vertical loads of similar magnitude to those which are imposed upon
adjacent or attached elements. Refer to the Design Drawings for information on such
elements and/or required load capacities.
ix) Internal sills: Internal sills shall be designed to accommodate a man loading of 1.1kN
without permanent deformation.
b) Inclined glazing shall be capable of accommodating live loads based on BS 5516 without any
reduction in its performance. Refer to Section Z25 for further information.
H11.1408 Imposed Movements

The works shall be capable of accommodating loads imposed upon the system by defined
movements of its supporting structure and/or other adjacent elements.
H11.1409 Wind/Air Pressure Loads

a) The works shall withstand without permanent deformation, the effects of wind loads where
appropriate (e.g. external conditions or internal areas subject to external wind pressure). Refer
to clause A.5305.
b) Calculated pressure loads shall include the effect of internal air pressures within the building,
taking into account the presence of significant openings, which might arise occasionally within
the building enclosure.
c) Refer to the Wind Tunnel Test/Report prepared by others.
d) The loads created by wind loading as specified shall be accommodated safely, without
detriment to the overall design, structural integrity and performance of the works.
e) Make necessary provisions as required to eliminate vibration, noise and metal fatigue caused by
airflow to the screen cladding.
H11.1410 Thermal Movement

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a) Allow for local thermal movements exerted due to the psychrometric data specified in Section
A.
b) The works, including all necessary support structure, shall be designed to accommodate
changes in dimension and shape of its components resulting from changes in service
temperatures and from differential surface temperatures between the inside and outside of the
building without any reduction in the specified performance. The design shall cater for all
temporary and permanent conditions envisaged for the works.
c) Surface differential temperature range for components of metal components shall be taken as
0°C to + 80°C.
d) The annual surface temperature ranges for the materials used in the works shall be confirmed
during the Detailed Design period, both for external surface temperatures and internal
temperatures when the building is in normal use and when empty or out of use. Due regard
shall be made to the effects of orientation of the building towards the sun, in particular for
overhead and sloped glazing situations and thermal stress calculations and risk assessments
shall be submitted by the Contractor for review.
H11.1411 Inertial Loads

The works shall be capable of accommodating inertial loads arising due to the
acceleration/deceleration of moving sections including opening lights, doors and vents of the building
or enclosure.
H11.1412 Exceptional Loads

a) If specifically required by the Architect, the system shall also be designed to withstand
exceptional loads such as, high impact loads (e.g. vehicle impact) and seismic loads
(earthquakes). For such exceptional loads only, the system may be allowed to sustain a degree
of damage.
i) Impact loads: As specified herein.
ii) Seismic loads: To be confirmed.
H11.1413 Strength of Doors

a) Ensure that the doors, including ironmongery, meet the ‘heavy duty’ category as defined in DD
171 or an equivalent international standard. At the same time doors shall comply with and not
compromise the other stated performance criteria for the works.
b) Provide evidence to demonstrate that the doors, including ironmongery, have been tested to
meet the minimum acceptance criteria given in DD 171 for the following:
i) Slamming shut impact.
ii) Slamming open impact.
iii) Heavy body impact.
iv) Hard body impact.
v) Torsion.
vi) Download deformation.
vii) Closure against obstruction.
viii) Resistance to jarring and vibration.
ix) Abusive forces on door handles.
c) Glass in doors:
i) Comply with BS 6262.
ii) Impact performance to achieve class A (class 1B1) to BS 6206 and BS EN 12600.
d) Ensure that the maximum opening pressures required to open fire rated or non-fire rated doors
on disabled access routes are in accordance with the requirements of BS 8300.
Environmental Performance
H11.1414 Moisture Movement

a) The works shall withstand movement without permanent deformation or any reduction in the

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specified performance:
i) Due to changes in the moisture content of its components, resulting from variations in the
moisture content of the air.
ii) Due to the expansion of absorbed or retained moisture caused by the temperature
extremes expected.
b) Allowance shall be made to control the flow of any water that may collect behind or within the
cladding and for directing this water to the outside, such that no water remains internally.
H11.1415 Thermal Performance Requirements

a) Detail the works to minimise cold bridging in any area of the system. The maximum thermal
permitted transmittance (U-value) for the various areas of the works shall be as follows:
i) U values shall be as specified for the relevant cladding types.
b) The average U-value through the works shall comply with the above requirements and meet all
Statutory requirements as well as Local Building Regulations and the M&E requirements for
heat gain/loss as relevant.
c) Submit thermal calculations for the various components and the average thermal performance
of the proposed works to comply with the specified requirements.
d) Ensure that thermal movements shall not result in unacceptable levels of audible noise.
H11.1416 Solar Performance Requirements

a) General:
i) Data sheets for project specific glass build-ups in accordance with BS EN 410 (light
transmittance, radiant transmittance of glazing) with tolerances of ±3% for flat glazing,
shall be submitted in respect of solar and visible light performance confirming compliance
with the Specification. Facilities shall be maintained to evaluate and report on expected
solar performance under varying conditions of solar radiation and external/internal air
velocity.
ii) The works shall be designed to ensure that the glazing does not crack or distort or is
damaged in any way through differences of temperature on the surfaces of the glazing.
iii) All specified criteria are nominal values.
b) Confirm the total solar transmission (G-value) for each glass type specified for review by the
Architect. Glass manufacturers and types shall be acceptable to the Architect only if they meet
the performance and visual requirements defined by the Specification.
c) Individual GL Types:
i) Glass Type GL-01 shall be neutral body tint, solar control double glazed, insulated, safety
glass units meeting the following criteria:
• Light transmission factor: Not less than 70%.
• External light reflectance: Not greater than 10%.
• Total solar transmission (G-value): Not greater than 0.55.
• Colour rendition index of glass: Not less than 95%.
• U-value: Not greater than 1.8W/m²K.
• High performance coating: No.
• Low E coating: Yes.
• Safety glass requirement: [Inner pane and outer pane].
• Acoustic treatment to meet the requirements of the Acoustic Report.
ii) Glass Type GL-02 shall be coloured (body tinted), double glazed, high performance,
insulated, safety glass units meeting the following criteria:
• Colour: To be confirmed.
• Light transmission factor: Not less than [TBC]%.
• External light reflectance: Not greater than [TBC]%.
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• Total solar transmission (G-value): Not greater than 0.55

• Colour rendition index of glass: Not less than [TBC]%.
• High performance coating: Neutral solar control coating.
iii) Glass Type GL-03 shall be clear/neutral body tinted, double glazed, high performance,
• Colour rendition index of glass: Not less than 95%.
• High performance coating: No
iv) Glass Type GL-10 shall be neutral body tint, solar control double glazed, insulated, safety
glass units meeting the following criteria:
• Colour rendition index of glass: Not less than [TBC].
• High performance coating: No.
• Low E coating: Yes
v) Glass Type GL-11 shall be coloured (body tinted), double glazed, high performance,
• Colour: To be confirmed.
• Light transmission factor: Not less than [TBC]%.
• External light reflectance: Not greater than [TBC]%.
vi) Glass Type GL-12 shall be clear/body tinted, double glazed, domed high performance,

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vii) Values indicated are regarded as the minimum the glass must achieve.
viii) All inner panes of the double glazed units are to be safety glass to BS 6206 and BS EN
12600.
H11.1417 Air Permeability/Infiltration

a) The Detailed Design shall minimise airflow from the outside to the inside of the building through
joints/junctions to control concentrated airflow.
b) The works shall resist the passage of air such that its air leakage rates, if measured in
accordance with the CWCT Standard, shall not be exceeded in both the initial and repeat tests.
c) The works shall have a maximum air infiltration rate of:
i) 1.5 m³/hr/m² for fixed lights.
ii) 2.0 m³/hr/per metre length for opening lights/smoke vents.
iii) 3.0m³/hr/per metre length of opening for framed and rebated doors.
d) Items i), ii) above shall be tested at a minimum pressure of 600 Pa when tested generally in
accordance with the CWCT Standard for Systemised Building Envelopes.
e) Air leakage shall be distributed and not concentrated at any one location.
f) Provide actual air leakage results from tests for acceptance.
g) Where appropriate, analyse details of pressure equalisation proposals for all areas of rainscreen
cladding taking into account variable external pressure gradient for acceptance by the Architect.
H11.1418 Condensation
a) Except under extreme conditions where the relative humidity is in excess of that specified in
clause A.5402, condensation shall not form, either on internal or external surfaces of framing
members, glazing, solid panels or louvres, or interstitially within the construction of infill panels
forming a part of the works, such that it may lead to degradation of performance, damage or
staining under the psychrometric conditions specified.
b) Condensation shall be permitted in non-visible drained and ventilated rebates subject to
condensation not having a deleterious effect on performance or durability.
c) Provide a condensation risk assessment with the Tender return based upon the psychrometric
conditions specified, for review by the Architect.
d) In conditions outside of the ranges given in A.5400, design the system so that the condensate
either:
i) Drains to the outside or;
ii) Sits in a collection point designed for this purpose, which allows the condensate to
evaporate harmlessly.
H11.1419 Capillarity
The Detailed Design, gaskets, seals, etc. shall take into account and eliminate any possibility of water
migration to the inside of the building due to capillarity.

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H11.1420 Weather and Water Penetration Resistance

a) The works shall be weatherproof and watertight, ensuring the prevention of water leakage onto
the internal face of the works and any other part of the system that may be adversely affected.
b) The works, including flashings and junctions with adjacent parts of the building, shall be
weatherproof and watertight under all conditions with full allowance made for deflections and
other movements.
c) The Detailed Design of the works shall not be based on a single line of defence. The cavities
between the lines of defence shall be drained and ventilated to the exterior. Wet applied seals
for the purpose of preventing the ingress of water shall not be accepted with the exception of
the structural silicone seals or wet seals used for sealing the works against adjacent interfacing
systems.
d) The Detailed Design and construction of the works shall be such that all rigid or fixed joints shall
remain rigid and accommodate all specified thermal, building structure or other movements and
any applicable loads without compromising its watertightness. All movement joints shall also be
finally designed and constructed to accommodate such loads or movements without
compromising the glazing's watertightness.
H11.1421 Local Factors

a) Visit the Site in order to become familiar with local requirements. Local microclimatic conditions
shall be taken into account and grades of materials assessed as suitably durable for the
location shall be selected.
b) An assessment of microclimatic conditions shall be made with due allowance for any factors
likely to have an adverse effect on materials intended for the works. More appropriate materials
shall be substituted if adverse effects are predicted.
Acoustic
H11.1422 Acoustic Performance Requirements

a) The works shall effectively insulate the internal areas of the building from high levels of noise.
b) The works shall provide internal sound reduction between floors.
c) The works shall provide internal sound reduction between adjoining areas on the same floor.
d) Evidence shall be provided that the acoustic performance requirements given herein can be
achieved.
e) The measured noise exposure of each façade shall have been used in conjunction with the
internal noise criteria of 45dBL Aeq to derive the façade sound insulation requirements of this
development.
f) Refer to the acoustic consultants specification.
g) Each façade/cladding system shall achieve the required sound reduction indices (R) as
specified in the Acoustic Report when tested in accordance with BS EN ISO 140: Part 3
H11.1423 Flanking Transmission

a) Where required, the works shall be tested for flanking transmission with a partition meeting the
façade at a mullion. Refer to the Acoustic Report as relevant. The system shall provide a
weighted standardised flanking level difference of at least DnTf,w 46dB when tested in an
accredited independent laboratory in accordance with BS EN ISO 10848: Part 2.
b) Where required, the works shall be tested for flanking transmission at a junction with the
floor/ceiling slabs. Refer to the Acoustic Report as relevant.
c) Any acoustic tests are to commence at a time agreed with the CA, in a recognised independent
laboratory, with a comprehensive test report being submitted, in writing, to the CA within three
weeks of completion of the tests.
d) Where existing test data is available from a recognised independent laboratory, it shall be
considered acceptable providing the tests have been carried out for the exact system being
offered. Test data for similar constructions may be accepted if supporting computations are
offered to account for any differences between the proposed and tested construction.
Fire
H11.1424 General

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a) All elements of the works shall be either non-combustible or not easily ignitable with class B
flame spread characteristics, and shall not produce excessive quantities of smoke or toxic
gases. Comply with NFPA 5000, NFPA 251, NFPA 101 and the Fire Strategy Report.
b) All materials and products used shall comply with Abu Dhabi Civil Defence local requirements.
c) Provide fire retardant treatment to timber as required by the Fire Strategy Report. Comply with
Section Z12. Treatment to be compatible with timber finish and shall not discolour timber.
H11.1425 Surface Spread of Flame

a) Comply with NFPA 5000 and the Fire Strategy Report.
b) All materials used internally and externally (excluding sealants and gaskets) shall have the
required surface spread of flame classification to comply with NFPA 5000 and the Fire Strategy
Report.
H11.1426 Fire and Smoke Stopping/Barriers/curtains.

a) Be responsible for the provision of all cavity barriers in the external wall and for fire stopping, as
required, at the junction of the external wall with all other fire-resisting elements of the structure,
to meet the requirements of the NFPA 5000, the Fire Strategy Report and Local Building
Regulations.
b) Ensure that all joints, junctions, interfaces etc for smoke barriers are appropriately sealed to
prevent the passage of smoke and heat (fire effluent) and meet all the applicable requirements
of BS EN 12101-1.
b)c) Provide fire rated sealing to all junctions with floor slabs and party walls.
c)d) All fire and smoke stops, smoke barriers/screens shall be positively fixed in position in such a
manner that they shall not become dislodged in the event of a fire. The fixing shall secure the
stop in position for a period at least equal to that required for the compartment wall or floor
against which the works abut.
H11.1427 Fire Resistance

a) If fire resistance is required in the works for space separation purposes, comply with functional
requirement of NFPA, the Fire Strategy Report and the Local Building Regulations.
b) Where fire-resisting glass is required, comply with the specified fire ratings and Section Z25
and ensure that beadings, gaskets, etc. are suitable for the fire rating to be achieved.
c) Reaction to fire properties: The external surfaces of the cladding shall comply with functional
requirement of the NFPA, the Fire Strategy Report and Local Building Regulations.
d) Any insulation in the external wall construction that is exposed in a ventilated cavity shall be
non-combustible.
H11.1428 Joint System Required

Joints made within or between fire resistance-rated assemblies shall be protected with a joint system
that is designed and tested to prevent the spread of fire for a time period equal to that of the
assembly in which the joint is located. Such materials, systems, or devices shall be tested as part of
the assembly in accordance with the requirements of ASTM E 1966, Standard Test Method for Fire-
Resistive Joint Systems, or ANSI/ UL 2079, Standard for tests for Fire Resistance of Building Joint
Systems.
H11.1430 Fire Stopping between Floors

a) Comply with the fire strategy report and NFPA 251.
b) Submit details of suitable products, including fire tests information complying with the relevant
test methods.
Durability
H11.1431 General
The performance criteria shall be satisfied for the full service life of the works, as stated in the
Specification, provided always that the maintenance has been carried out as specified.
H11.1432 Impact and Abrasion Resistance

a) The works shall resist abrasion from agreed cleaning methods and maintenance systems

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without any noticeable change in surface appearance. Generally, surfaces shall be sufficiently
hard (including glass coatings) to resist all reasonable impacts from hand-held objects in
accordance with BS EN 356.
b) Impact tests shall be carried out to all assemblies adjacent to pedestrian areas in accordance
with the recommendations of BS 8200. Tests shall conform to category B requirements.
c) The extent of any damage determined through testing shall be recorded and, where possible,
quantified. Samples shall also be submitted to the Architect.
H11.1433 Demountability
a) Elements of the works shall be individually and independently removable ensuring access for
maintenance and/or replacement of glazed units in the event of breakage.
b) The removal of glazed units shall not affect the performance or safety of adjacent or any other
part of the works. Provide a method statement for removal and replacement of glass panels for
acceptance.
Components
H11.1434 Primary Components

Primary components are all components with a predicted service life of not less than the design life of
the curtain wall without the need for maintenance (with the exception of glass), other than regular
cleaning. The following components shall be considered primary components:
a) All framing and its fixings and means of attachment to the structure.
b) Panels and their fixings.
c) Thermal insulation and vapour barriers.
d) Flashings, gutters, cappings, and similar metal weathering elements.
e) Support steelwork.
f) Sealants, which are concealed within the system and which cannot be inspected without
dismantling the works.
g) Finishes to metal components.
H11.1435 Secondary Components

a) Secondary components are all components with a predicted service life of less than the design
life of the curtain wall, assuming regular cleaning and maintenance in accordance with
information to be provided by the curtain wall supplier. The following components shall be
considered secondary components:
i) Internal linings.
ii) Window and door equipment.
iii) Gaskets and compression seals.
iv) Other sealants.
v) Glass and glazing components.
vi) Motors, actuators and ancillaries.
b) Secondary components shall be capable of replacement without dismantling the works, or
compromising the structural or weatherproof integrity of the system. Components shall be
capable of replacement without progressive dismantling of the works.
c) The predicted service life of secondary components shall be stated and guidance on the
required maintenance provided.
Services
H11.1436 Cables within Box Sections

a) As specified, aluminium box sections shall be capable of containing electrical cables serving
security/access equipment to doors, activators to opening vents, others, as indicated on the
Design Drawings.
b) Openings for the installation of cables shall be provided by the Contractor, after discussion and
agreement with the Architect.
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H11.1437 Opening Lights

a) Unless specified otherwise, opening lights shall comply with BS 6375: Part 2 and with all the
performance criteria specified herein.
b) Opening lights shall not disengage from the fixed areas of the works when open or closed
under any of the specified loads.
c) When fastened in the closed position the opening lights shall not be capable of removal from
the fixed areas of the works except by deliberate action from the interior of the building or from
actuation by the BMS system (smoke pressure equalisation vents).
d) Hinge mechanisms for opening lights shall be such that electrical continuity is maintained for all
opening lights and any limitations in this respect shall be stated in the Tender.
Blinds
H11.1438 General
a) Blinds shall operate with minimal noise, smoothly and consistently for the service life as
specified.
b) All blinds shall be easily operated by a single person using the intended operating mechanism.
H11.2000 SYSTEMS, MATERIALS AND FABRICATION
H11.2100 SYSTEMS
Wall Cladding Systems
H11.2101 Framing to Screen Cladding

a) Solid Stainless Steel frames:
i) Solid stainless steel fabricated posts/framing as shown on the Design Drawings.
ii) Grade of stainless steel to be 1.4401 and of designation to avoid the occurrence of
stress corrosion cracking.
iii) Profiles/dimensions as shown on the Design Drawings.
iv) Stainless steel to be shot peened or to have brushed finish (to be confirmed).
v) Refer to Section Z11 for stainless steel generally.
b) Extruded aluminium:
i) Refer to Section Z11 for aluminium generally.
ii) Panels to be sufficiently thick sheets as required to satisfy the design intent and the
performance criteria.
iii) All edges polished and arrissed.
iv) Aluminium to be PVDF paintedPVDF coated internally and colour anodised externally.
v) Panels to be cast to suit the required patterns.
vi) Refer to the Design Drawings for details of pattern types.
vii) Working Drawings shall show the final design while strictly maintaining the design intent
and visual requirements.
c) Fixings: All fixings shall be concealed. Provide aluminium bracketry as required finished to match
the screen.
d) All screens to be demountable.
e) Main Timber Fframing:
i) Timber: Timber species to be as follows: (Options to be costed separately)
• Preferred option: Dark hHardwood. Colour to be similar to Red Louro (similar in
colour to Nyatoh).
• Option 1: Hardwood veneered MRMDF (veneer colour to be similar to Nyatoh).
Note that this option is not for use externally and shall only be used above a height

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of 2.5m above each floor level. The preferred option should be used below this
point.
ii)Final finish of timber to be no more than 10% gloss.
ii) Main mullion frames shall be manufactured from solid timber either side of a stainless
steel/mild steel flat section to profile as shown on the Design Drawings. Transoms and
other framing members to comprise solid hardwood (with stainless steel reinforcement as
required to suit spans). Working Drawings shall show the final design while strictly
maintaining the design intent visual requirements.
iii) Grade: Timber quality grading to be at least equivalent to grade J10 to BS EN 942 or
other equivalent standard to be agreed with the CA. Strength grading to comply with BS
5756. The Contractor shall select the most suitable strength grades to suit the
performance requirements as applicable.
iv) Timber for lamination to be selected by mechanical or visual grading to BS EN 519, BS
5756 and BS 4978 respectively or other acceptable International standard as
appropriate.
v) Timber quality and grades to be selected to meet the performance requirements to
comply with Eurocode 5 (DD ENV 1995), BS EN 338, BS EN 386, BS 5268, BS EN
391, BS EN 392 as relevant. Timber durability to be a moderately durable timber with low
movement potential to comply with BS EN 350.
vi) Timber to be selected from slow growing, fine grained sources with density of between
450-800kg/ m³ (gross density).
vii) Timber to be preservative treated using a suitable solvent-free (water based) anti-fungal
preservative treatment. Treatment to be of the immersion process type and suited to stain
finishes being impregnated into timber without any likelihood of discolouration of timber.
Comply with the requirements of Section Z12 as relevant. Preservative treatment to
present no health hazards to building occupants during the life of the building.
viii) Timber finish. Refer to clause H11.2401.
ix) Fire rating of timber to be in accordance with the NFPA and the Fire Strategy Report.
x) All edges of timber to be eased (i.e. no sharp corners). radius 2mm.
xi) Expansion/ contraction co-efficients to be established and appropriate jointing methods
used to accommodate the required expansion and contraction.
xii) Jointing shall be discreet tight joints housed/morticed as required.
xiii) Bending stress of timber shall be calculated and shall not exceed allowable limits.
xiv) Moisture content to be appropriate to the relevant internal climatic conditions including
during construction and, unless otherwise agreed with the Architect, to be 15% ± 1.5.
The maximum difference between adjacent laminations to be 2%. Refer to Section A for
environmental data.
xv) Refer to Section Z10 for further requirements for timber.
xiv)xvi) Working Drawings shall show the final design while strictly maintaining the
design intent visual requirements..
xv)xvii) Refer to Section Z10 for further requirements for timber.
f) Working Drawings shall show the final design while strictly maintaining the design intent visual
requirements.
H11.2102 Bronze Cladding/Screens/Framing/Features

a) Refer to the Design Drawings for details of pattern types.
b) Working Drawings shall show the final design while strictly maintaining the design intent visual
requirements.
c) Bronze:
i) Material: Of a suitable grade and alloy.
ii) Bronze for glazing bars to be extruded using a suitable alloy for extrusion purposes and to
suit the strength and performance requirements.

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iii) Refer to Section Z11 for bronze generally.

iv) For flat/folded panels, bronze to be sufficiently thick sheets as required to satisfy the
design intent, flatness criteria and the performance criteria.
v) All exposed edges to be either press-folded sheet or arrissed.
vi) Bronze to be pre-patinated as Section Z11.
vii) Panels to be carefully formed to suit the required patterns.
d) Fixings: All fixings shall be concealed. Provide bronze bracketry as required to match the
screen.
H11.2103 Insulated Backing Wall System

a) Studwork: Galvanised mild steel or stainless steel concealed studwork/framing at centres as
required forming structural inner wall with fixing rails and wind posts as required to support the
screen cladding. The Contractor shall design the studwork to comply with the requirements of
the Specification.
b) Insulation to be provided within the partition system (between studs/framing) as specified
herein to achieve the U-values required. Insulation to be of non-combustible mineral wool or
acceptable equivalent to meet the requirements of the Specification.
c) Outer lining: The outer layer shall comprise of a waterproof layer with lining comprising of one of
the following as shown on the design drawings.
i) Ensure that no fixings are protruding.
ii) Colour anodised aluminium panels.
iii) Veneered timber panels.
d) Inner Lining: 2 layers of 12.5mm plasterboard inner linings fixed to the metal framing.
e) All structural bracing shall be included to cater for the design loading criteria including
pattresses/fixing rails as required.
f) The backing wall system shall provide the breather membrane and vapour barrier to the overall
wall build-up as an integral part of the design. The breather membrane to be fixed to the outer
lining to provide a continuous weather proof membrane which shall be dressed as required to
take water away from the building/cladding.
g) Metal to metal contact shall be isolated to avoid noise emanating from the system under
differential wind loading.
h) The backing wall shall accommodate the required deflection in the structure without resulting in
damage to framing or panels and shall include adjustable bracketry as required. Refer to the
Structural Engineer's Movement and Tolerance Report.
i) The system shall include all clips, flashings, seals, trims, windpost steelwork including all
bracketry, fixings and interfaces necessary to complete the fabrication and installation.
j) The Contractor shall provide all connections, bracketry and fixings to the primary steelwork as
necessary. No visible fixings will be permitted.
H11.2104 Aluminium Louvres

a) Single bank shallow section louvre system integrated into the cladding system as required as
shown on the Design Drawings. Louvres to comprise extruded aluminium profiles to satisfy the
design intent as shown on the Design Drawings with PVF4 finish. Refer to Section Z11.
b) Louvres to provide class A rain defence to comply with the HEVAC standard and to incorporate
sand traps and insect mesh.
c) Aluminium louvre blades shall comprise single piece extrusions of profile depth/pitch as
indicated on the Design Drawings with aluminium framing, end capping pieces, connectors and
support bracketry as required for fixing back to the curtain wall mullions.
d) The aluminium extrusions shall be to BS EN 573: Parts 1-3, BS EN 515 and BS EN 755: Parts
1-9.
e) Refer to the M&E specification for requirements for blanking panels, dynamic performance,
pressure drop and free area requirements for all louvers.
f) Provide blanking plates to all non-active louvres. Blanking plates to be PVF4 finished matt black.
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Refer to the M&E Specification and Drawings for requirements for blanking panels.
H11.2105 Timber Cladding/Screens/Framing/Solar Shading/Features

a) Solid hardwood with stainless steel/aluminium supports/bracketry as shown on the Design
Drawings.
b) Timber species as follows:
• Preferred option: Dark hHardwood – Colour to be similar to Red LouroNyatoh
• Option 1: Hardwood veneered MRMDF (veneer colour to be similar to Nyatoh).
Note that this option is not for use externally and shall only be used above a height
of 2.5m above each floor level. The preferred option should be used below this
point.
c) Grade: Class J10 to BS EN 942. Strength grading to comply with BS 5756. The Contractor
shall select the most suitable strength grades to suit the performance requirements as
applicable.
d) Timber durability to be a moderately durable timber with low movement potential to comply with
BS EN 350.
e) Knots: Size, types allowed, plugs, inserts, fillers and distribution of knots shall be in accordance
with the relevant clause in BS EN 942. Unsound, dead and loose knots shall not be present on
any visible face. Making good as described in BS EN 942 shall not be acceptable. Arris, splay,
margin and branched knots are not acceptable.
f) Cutting: Quarter cut.
g) Jointing shall be discreet tight joints housed/morticed as required.
h) Discoloured sapwood is not acceptable. Refer to BS EN 942.
i) Timber for lamination to be selected by mechanical or visual grading to BS EN 519, BS 5756
and BS 4978 respectively or other acceptable International standard as appropriate.
j) Timber finish. Refer to clause H11.2401
j)Finish timber to be planed and natural (i.e. no applied finish unless otherwise specified).
(**Alternative provide a low build stain in colour to match the selected timber**).
k) Moisture content to be appropriate to the relevant internal climatic conditions including during
construction and, unless otherwise agreed with the Architect, to be 15% ± 1.5. The maximum
difference between adjacent laminations to be 2%. Refer to Section A for environmental data.
H11.2106 Aluminium Shading Devices

a) Aluminium to comply with Section Z11.
b) Aluminium components to have PVF2/polyester powder coat finish finish (TBC). Colour to be
confirmed..
c) Refer to the M&E documentation for the specification of controls.
d) All visible metal elements shall be new and free from visible defects or performance defects.
Finishes shal be free from any blemishes, tool or die marks, striations or defects of any kind.
e) All moving parts shall move freely and shall be self-lubricating. Ensure that the system is
designed to not be affected by the presence of sand.
f) The following information shall be supplied for every item component and/ or system:
i) Certified manufacturing certificate.
ii) A full description of operating requirements, giving any special features.
iii) A full breakdown of the parts and the catalogue number of the constituent parts.
g) Provide all associated bracketry/ cleats and fixings to fix the system to the primary
structure/cladding as required.
h) No product names, manufacturer's names or reference numbers or identifying marks shall
appear on the finished surface of any component.
Glazing
H11.2110 Glass Types (Refer to section Z25 for general glass clauses)
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a) GL-01: Neutral body tinted double glazed unit (solar control) with low reflectivity and good light
transmittance.
b) GL-02: Double glazed coloured glass (body tinted) unit (solar control).
c) GL-03: Neutral body tinted double glazed unit (solar control).
d) GL-10 Neutral body tinted double glazed unit (solar control).
e) GL-11: Double glazed coloured glass (body tinted) unit (solar control).
f) GL-12: Curved clear double glazing to rooflight.
Blinds
H11.2112 Fabric Blinds to Rooflights (SHD-04)

a) Electrically operated fabric roller blind with aluminium bracketry and supports connected to the
steelwork/framing as shown on the Design Drawings.
b) Fabric material shall be solar control screen fabric as follows:
i) Reflective fibre - fire: Fabric to achieve a minimum of type B flammability to BS 5867: Part
2 and class 0 spread of flame when tested to BS 476.
ii) Colour: To be confirmed to match accepted samples.
iii) Open area: To comply with the solar shading requirements (To be confirmed).
iv) The Contractor shall submit technical data for fabrics for blinds giving material properties
including breaking strength, weight, thickness, colourfastness, dimensional stability for
acceptance by the Architect.
c) Motorised operation with motor concealed within the headbox, with 2 No. key controlled
switches:
i) Blinds shall be automatically operated with provision for local manual override and control.
Blinds in each location shall be able to be automatically reset in any position.
ii) Each operating motor - powered by 230 V ac - shall have an automatic cut-out at both
ends of its travel.
iii) A double weighted bottom bar shall reduce friction and ensure that the cover remains
tensioned to maximum possible degree.
d) Accessories:
i) The aluminium roller shall be concealed within extruded aluminium headbox with polyester
powder coat finish to be agreed with the CA. The headbox shall be fitted as shown on the
Design Drawings. The Contractor shall provide details showing typical interface with
window, curtain walling and soffits using concealed fixings.
ii) Extruded aluminium bottom rails shall match the headbox finish.
e) Aluminium components to have PVF2/polyester powder coat finish finish (TBC). Colour to be
confirmed..
f) Refer to the M&E documentation for the specification of controls.
g) All visible metal elements shall be new and free from visible defects or performance defects.
Finishes shal be free from any blemishes, tool or die marks, striations or defects of any kind.
h) Mechanisms shall incorporate overload devices to prevent damage from excessive operating
forces.
i) The works shall provide a robust, smoothly operating installation that meets the performance
requirements, irrespective of the blind's dimensions and shall, with routine maintenance, retain
its original appearance and performance throughout its design life.
j) All moving parts shall move freely and shall be self-lubricating.
k) The following information shall be supplied for every item component and/ or system:
i) Certified manufacturing certificate.
ii) A full description of operating requirements, giving any special features.
iii) A full breakdown of the parts and the catalogue number of the constituent parts.

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l) Provide all associated bracketry/ cleats and fixings to fix blinds to the primary structure/cladding
as required.
m) No product names, manufacturer's names or reference numbers or identifying marks shall
appear on the finished surface of any component.
n) Profiles shall be true to line, angle and curvature as indicated on the Design Drawings.
o) Refer to Section Z11 for aluminium and stainless steel generally.
H11.2114 Floor Channel Profiles

a) Refer to the Design Drawings for dimensions and profile.
b) Working Drawings shall show the final design while strictly maintaining the design intent visual
requirements.
c) Refer to Section Z11 E50 for aluminium and steelworkprecast concrete generally.
d) The channel profile is required to be capable of accommodating wheels associated with the
travelling/sliding maintenance ladder/platform system and shall be designed to accommodate
the relevant point loads associated with this system. Refer to the relevant façade access report
for details of loads/wheels etc.
e) Fixings/Bracketry: Provide aluminium or steel bracketry as required with suitable corrosion
protection. All fixings and bracketry shall be concealed unless otherwise shown on the Design
Drawings.
H11.2200 MATERIALS
General
H11.2201 Fabric Specifications

a) For metalwork requirements refer to Section Z11 of the Specification.
b) For fixings/adhesives refer to Section Z20 of the Specification.
c) For sealants requirements refer to Section Z22 of the Specification.
d) For glass and coatings requirements refer to Section Z25 of the Specification.
e) For metalwork finishes requirements refer to Section Z30 of the Specification.
f) For powder coatings refer to Section Z31 of the Specification.
g) For PVDF coatings refer to Section Z32 of the Specification.
h) For anodising requirements refer to Section Z33 of the Specification.
i) For micaceous iron oxide (MIO) requirements refer to Section Z34 of the Specification.
j) For gasket requirements refer to Section Z36 of the Specification.
k) For precast concrete requirements refer to section E50 and the Structural Engineers
Specification.
Frames
H11.2202 Glass Retaining Frames Generally

a) Unless otherwise specified, glass retaining frames shall be manufactured from fabricated
stainless steel, extruded aluminium or extruded bronze as specified. Shop Drawings shall show
the final extrusion design while strictly maintaining the Architect's visual requirements.
b) All corners shall be jointed and sufficiently flush, flat and true to comply with the specified
tolerances.
c) Frames shall be fully gasketed with vulcanised corners where in the same plane and forming the
air and vapour barrier. No butting on Site shall be permitted.
d) Unless otherwise agreed with the Architect, frames shall be factory-glazed, delivered and
installed in one piece.
e) The frames shall safely and securely retain the glass by means of a combination of dry gaskets,
structural silicone and/or adequate aluminium/stainless steel locating pieces.
f) All framing shall utilise the minimum cross section necessary to maintain rigidity and

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performance.
g) Framing shall include a glazing chamber separated by two seals, one outside the glazing
chamber, the other at the back. The glazing chamber shall be drained to the outside, this
system shall comprise:
i) An outer seal designed to prevent water ingress into glazing or other chambers to
substantially inhibit water penetration and to prevent heavy wetting of the back seal.
Designs having full width gasket seals shall incorporate capillarity breaks to prevent the
ingress and entrapment of water between surfaces in continuous contact.
ii) A back seal. This seal shall act as an air seal to minimise air permeability up to limits as
specified. If subjected to light wetting in localised patches it shall prevent the ingress of
this water to the inside face of the works. (Note: Designs relying upon single stage seals
shall not be used).
iii) State, in the Contractor’s Proposals, the spacings of drainage outlets for acceptance by
the Architect and demonstrate the adequacy and suitability of such spacings.
h) Framing for inclined glazing shall match the vertical curtain walling but designed for use as
overhead glazing with drainage channels as required within to take water to the outside of the
building.
H11.2203 Glass Retaining Frames (Structural Silicone Glazing System)

a) Provide a design for prefabricated, unitised, aluminium, stainless steel or bronze frames made of
thermally broken or separated extrusions/fabrications as specified, for the structural silicone
glazed units.
b) Unless otherwise specified, the concept of the framing shall be a four-sided structural silicone
glazing system with minimal framing being visible from the outside.
c) The framing shall be based on the pressure equalisation principle incorporating an external skin
acting as a water and weather barrier and an internal skin providing the required air and vapour
tight seal. Special openings in the framing shall comply with current glazing recommendations in
size, spacing and location and shall be provided to the exterior of the frames in order to ventilate
around the double glazing units, creating a drainage system for any water or moisture. All
draining provisions shall be provided at the lowest level of the glazing rebates or framing system
cavities to positively prevent any residue water from remaining within.
d) Allow for all glazing frame members to consist of two separate profiles complying with all
structural and surface treatment requirements. Framing shall be assembled using composite
profiles with a proven continuous thermal break material. The thermal break system shall
minimise the thermal transmittance, noise transfer and shall inhibit condensation on any of the
internal surfaces of the framing members, the composite metal panels or the glazing under the
extremes of the design temperatures stated herein.
e) Where structural silicone is specified as the preferred means of panel fixation, it is the visual
intent achieved by this method of fixing that is required. Where secondary means of retention/
support are required to satisfy the performance requirements and/ or local statutory
requirements, these shall be minimal and inconspicuous. All means of retention/ support shall
be clearly indicated as part of the tender return and also after Detailed Design on the Working
Drawings for acceptance by the Architect.
f) The framing profiles shall be detailed to allow for the secure attachment of continuous sealing
gaskets, vapour and air seals, gaskets within the glazing rebates as well as connections for
thermal break strips and provision for seals, corner cleats, brackets,butt joint spigots, clip-in
aluminium/bronze or stainless steel profiles etc. All of this shall be with due consideration to the
structural requirements, the specified type of surface treatment and to achieve the specified
solar shading, thermal transmittance and sound reduction values.
g) The framing profiles shall be factory assembled into unit frames by means of mitred corners,
mechanically jointed with cleats or with butted corners and the appropriate additional sealant.
The frames shall be structurally sound to fully comply with all applicable and specified wind and
dead load forces that may act on them, in particular during transportation and erection on Site.
The whole framing system shall be detailed to accommodate, without distortion or other
adverse effects, any differential structural and thermal movements.
h) Thermally broken or separated split mullion expansion joints shall be incorporated into the works
wherever required to allow for the thermal movement within the assembly. The outside
dimensions and appearance of these split mullions shall correspond exactly with the standard
frame profiles so that there is no visual distinction between these components. The split
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mullions shall be rigid and able to safely withstand any additional forces which may act on the
units, either during transportation or erection on Site, taking into account structural
requirements, the surface treatment, thermal transmittance and sound reduction values. The
entire split mullion system shall be detailed to accommodate, without distortion or other adverse
effects, any differential structural and thermal movements.
i) Weather seals shall be provided at all interfacing connections. The vapour barrier shall always
be installed on the warm side of the thermal insulation to provide a continuous air and vapour
tight seal at all interfacing joints and intersections between the units and the building structure.
j) All framing shall be detailed in order that any necessary replacement of damaged glazing units,
as well as doors, windows and structural silicone glazed components, can be carried out from
outside the building with minimum disturbance to occupants, except for any internal glazing
systems.
H11.2204 Glass Retaining Frames with Dry Pressure Glazing System

a) Prefabricated, unitised, aluminium, stainless steel or bronze frames made of thermally broken or
separated extrusions/fabrications for the glazed units.
b) The concept of all the framing shall be detailed to receive a fully pressure equalised glazing
system. The principle shall incorporate an external skin surface acting as a water and weather
barrier and an internal skin surface as an air and vapour tight seal. Special openings shall
comply with the current glazing recommendations in size, spacing and location and be provided
to the exterior of the horizontal glazing and cladding in order to guarantee air ventilation around
the double glazing units and the insulated spandrel panels and to create a drainage system for
any water or moisture. All draining provisions shall occur at the lowest level of the glazing
rebates or framing system cavities to positively prevent any residue water from remaining within.
c) All glazing frame members consisting of two separate framing profiles shall comply with all
structural and surface treatment requirements. These framing extrusions shall be fixed to
composite framing profiles with a proven continuous thermal break material. The thermal break
system shall minimise the thermal transmittance and noise transfer while inhibiting condensation
on any of the internal surfaces of the framing members.
d) The framing profiles shall be detailed to incorporate any necessary glazing beads, continuous
sealing gaskets, vapour and air seals, gaskets within the glazing rebates, connections for
thermal break strips and provision for seals, connection spigots, corner cleats, clip-in metal
profiles, fixing brackets, etc. All of this shall be with due consideration to the structural
requirements, the specified type of surface treatment and to achieve the specified thermal
transmittance sound reduction values.
e) The thermally broken or separated framing profiles shall be factory assembled into unit frames
by means of mitred corners, mechanically jointed with cleats and the appropriate additional
sealant. The frames shall be structurally sound to fully comply with all applicable and specified
wind and dead load forces, being sufficiently rigid to safely withstand any forces that may act on
them during transportation and erection on Site. The whole framing system shall be detailed to
accommodate, without distortion or other adverse effects, any differential structural and thermal
movements.
f) Weather seals shall be provided at all interfacing connections. The vapour barrier shall be
installed on the warm side of the thermal insulation to provide a continuous air and vapour tight
seal at all interfacing joints and intersections between the window and cladding units and the
building structure and/or the precast elements respectively.
g) All aluminium window framing shall be detailed in order that any necessary replacement of
double glazing units can be carried out from outside the building except for internal glazing
systems.
h) Special thermal break provisions shall be employed in the case of the curved window frames to
achieve all of the specified performance requirements of these special window units. The
curved aluminium profiles shall display a uniform radius and shall be free of any rolling marks,
imprints, scratches or distortion.
i) All aluminium extrusions and components shall be composite profiles or units with integral
continuous thermal break provisions. Under extremes of design temperatures and relative
humidity, no condensation shall appear on any internal surface of the framing member, the
composite metal panels or the glazing.
H11.2205 Stainless Steel Framing

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a) Stainless steel to be grade 1.4401 stainless steel.

b) Visible stainless steel to have satin 240 grit brushed finish or a shot peened finish.
c) Ensure that stainless steel grades are selected to ensure that stress corrosion cracking does
not occur.
d) Refer to Section Z11 for stainless steel generally.
H11.2206 Solid Insulated Aluminium Faced Panels

a) Insulated aluminium faced panels integrated into the curtain walling system forming spandrel
panels including gasketed joints. Panels shall provide a flat surface and be designed to prevent
the ingress of moisture interstitially or into the building.
b) Insulation to be mineral wool (non-combustible) of suitable thickness and material properties to
meet the U-values, thermal performance as required.
c) Facings: Aluminium Alloy Sheet. Refer to Z11 for sheet aluminium requirements generally.
Panels shall be designed to span between supports as required. Finish type and colour to
match curtain walling framing.
d) Gaskets and all joints shall be fully sealed with double seals to satisfy the water penetration
H11.2207 Solid Insulated Bronze Faced Panels

a) Insulated bronze faced panels integrated into the glazed walling system forming cladding panels
including gasketed joints. Panels shall provide a flat surface and be designed to prevent the
ingress of moisture interstitially or into the building. Bronze to have pre-patinated finish.
b) Insulation to be mineral wool (non-combustible) of suitable thickness and material properties to
meet the U-values, thermal performance as required.
c) Facings: Bronze (copper alloy) Sheet. Refer to Z11 for sheet bronze requirements and
patination requirementsgenerally. Panels shall be designed to span between supports as
required. Finish type and colour to match curtain walling framing.
d) Gaskets and all joints shall be fully sealed with double seals to satisfy the water penetration
H11.2208 Glass-To-Glass Corners

a) Where glass-to-glass corners are required, outer glass layer of the double glazed unit shall be
cantilevered and sealant bonded as required. Where the transoms cantilever horizontally to
support elements of the cladding provide inner stain less steel corner ties. Details shall
accommodate movements of the building without compromising the weather resistance and
watertightness. Corners shall stay rigid and maintain their appearance.
b) Glass to glass corners shall have an internal aluminium extrusion for stability and sealing
purposes.
Joints
H11.2209 Movement Joints

a) The requirement for any movement joints within the works shall be ascertained to accommodate
all movements stated herein. The works shall accommodate all movements of the joint in a
manner that does not compromise weather resistance and watertightness.
b) Maintenance of the works joints shall be by visual inspection. Externally and internally, vertical
movement joints shall appear as similar to the standard glazing system joint as possible. The
material used at the movement joint locations shall not be thermally broken or separated.
Windows
H11.2210 Opening Windows

a) Provide prefabricated, unitised aluminium/stainless steel or bronze frames incorporating
opening casements with structural silicone glazing, and/or gaskets as required comprising
thermally broken or separated framing components.
b) Where required, opening windows shall be fabricated using cantilevered front pane double
glazing with aluminium/stainless steel or bronze inner framing as required (referred to as
frameless). The glazing shall be supported using factory applied structural silicone jointing

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between back framing and glazing. All opening vents shall open to the outside/inside as shown
on the Design drawings.
c) Opening windows/casements shall comprise manually and/or automatically operated, bottom or
top hung, opening out casements as shown on the Design Drawings, with concealed restrictor
stays being installed into the framing in lieu of the fixed light glazing, wherever indicated on the
Design Drawings. Smoke control provision shall be maintained in accordance with BS 5588:
Parts 5 and 11 and BS EN 12101: Part 6 and as required by the District Surveyor/Building
Control Officer and/or the Fire Brigade respectively.
d) Where required to be electrically opening, windows shall be fitted with electrically powered
actuators geared to open and close the windows automatically, and to retain them safely open.
Opening windows shall be provided with a local control panel, to be mounted below the false
floor, with control wiring from control panel to window actuator; all fire rated in accordance with
BS 5839 and BS EN 54. Panels shall include stand-by batteries for continuous operation of
vents for a 3-hour period in the event of loss of mains power.
e) Opening frames shall be mitred at the corners and sufficiently accurately cut to prevent the
display of unfinished metal at mitre joints.
f) Section profiles shall comply with glazing rebate depth, width and edge clearance specified by
the glass sealed unit manufacturer or, in the absence of such specific recommendation, with the
provisions of BS 6262. The sealed unit manufacturer’s fabricating tolerances shall be
accommodated. Frames shall be sufficient to restrain the glass under maximum positive and
negative wind pressures.
g) Include for all framing members of the opening casements to comprise two separate metal
profiles, to comply with all structural and surface treatment requirements. The framing to
comprise composite framing profiles with a proven continuous thermal break. The thermal break
system shall minimise the thermal transmittance noise transfer and shall inhibit condensation on
any of the internal surfaces of the framing members.
h) Where opening sections and curtain wall framing sections are required to align, the external
dimensions and appearance of the framing for the opening casements shall correspond exactly
to the perimeter sub-frames for the fixed light glazing so that no visual distinction between these
components can be made. The framing of the opening casements shall be fixed into the
supporting window frames by means of heavy-duty aluminium or stainless steel hinges and
concealed opening restrictor stays. The interfacing joint between the opening casements and
the window frames shall be provided with a minimum of two perimeter sealing gaskets inserted
into corresponding grooves in the aluminium profiles, creating an external rain barrier and the
internal airtight vapour barrier required for a pressure equalised window system. The space
between these gaskets shall be ventilated and drained to the outside of the assembly.
i) Special aluminium/stainless steel/bronze extrusions shall be installed into corresponding
grooves in the external side of the framing profiles of the opening casements to provide the
loadbearing bonding surfaces between structural silicone joint and the supporting framework.
j) Special aluminium/stainless steel/bronze extrusions shall be installed into corresponding
grooves in the external side of the glazing sub-frame profiles to provide the dead loadbearing
support for the cured silicone glass setting blocks.
k) Special aluminium/stainless steel/bronze extrusions shall be installed from the outside to the
perimeter glazing sub-frames to provide a slim perimeter mechanical safety restraint for the
structural silicone glazed double glazing units. This continuous external perimeter glass restraint
framing shall be detailed to provide minimal metal visible externally. The external surface of
these perimeter safety restraints shall be flush with the external surface of the double glazing
units.
l) The extrusions for the framing of the opening casements shall be detailed to allow for the
secure installation of continuous sealing gaskets, vapour and air seals, gaskets within the
glazing rebates as well as connections for thermal break strips and provision for seals, corner
cleats, clip-in aluminium profiles, such as the special natural anodised aluminium extrusions for
the bonding of the structural silicone and the continuous perimeter aluminium safety rails for the
four-sided structural silicone glazing, heavy-duty aluminium or stainless steel hinges, concealed
stainless steel opening restraints, concealed multi-point locking devices with budget locks, etc.
All of this under due consideration of the structural requirements, the specified type of surface
treatment and to achieve the specified thermal transmittance and sound reduction values.
m) The thermally broken aluminium or separated profiles shall be factory assembled into opening
casement unit frames by means of mitred corners, mechanically jointed with cleats and the

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appropriate additional sealant. The entire opening casement assemblies shall be structurally
sound to fully comply with all applicable and specified wind and dead load forces. They shall be
sufficiently rigid to safely withstand any additional forces that may act onto these assemblies, in
particular during transport and erection on Site. The opening casements shall be detailed to
accommodate, without distortion, water leakage, noise or other adverse effects and/or any
differential structural and thermal movements.
n) All opening casements shall be detailed in order that they may be removed from outside the
building in the event of replacement of damaged double glazing units, so as to create minimum
disturbance to the occupants of the building.
o) The heavy-duty hinges shall be manufactured from aluminium or austenitic stainless steel to fully
comply with all applicable and specified wind and dead load forces. They shall be sufficiently
rigid to safely withstand any additional forces which may act onto the opening casements whilst
being operated or when they are in their closed or open position.
p) Opening casements shall incorporate two fully concealed mechanical opening angle restrictors
with a built-in mechanism to hold the opening casement rigidly in its open position under the full
specified design wind load until the locking latch is manually released.
Doors
H11.2211 General
a) Refer to the Door and Ironmongery Schedule for ironmongery requirements. Interface with the
M&E requirements regarding all security access requirements.
b) Refer to the Fire Strategy Report for fire resistant requirements.
c) Generally all doors to be of a robust nature to conform with DD171 and PAS 24. Where fire
rated doors are required, these shall incorporate fire rated glazing and glazing methods
including fire rated seals.
d) All doors shall prevent unauthorised entry by removing hinges or locking devices.
e) The client shall advise on the mastering requirements.
f) Comply with the requirements of BS 8300.
g) All cables/ conduits to be integrated and concealed in door frames. Draw wires to be provided
for connections by others.
h) Manifestation for all doors to be as referred to in Section Z25.
i) All doors opening outwards unless otherwise shown on the Tender Drawings.
j) Door frames and associated glazing to achieve the required maximum air leakage rates,
weathertightness, acoustic performance and U-values as specified.
H11.2212 Bronze Doors

a) Where forming solid doors within the system, doors shall be robust 'heavy-duty' grade doors,
with bronze frames, as specified, designed to prevent the ingress of water and tested as
specified for water penetration and air permeability.
b) Solid panels: Bronze faced insulated panels with fully formed return edges and welded corners.
Folds with internal ‘V’ cut to reduce bending radius. All fixings concealed.
c) Bronze to have pre-patinated finish.
d) Glazing: Provide prefabricated, unitised bronze frames incorporating structural silicone glazing,
fabricated in thermally broken or separated extrusions.
e) Hinged doors shall be rebated, hung on heavy duty bronze hinges and fully weather-stripped at
head, jambs and sills with compression seals. Pivoting doors shall incorporate heavy-duty hung-
pivot mechanisms to suit door design and to prevent ingress of water.
f) Allow for thermally broken framing members for the leaf of the doors to suit the door weight and
size. The framing shall be assembled as composite framing profiles with a proven continuous
thermal break material. The thermal break system shall minimise the thermal transmittance and
noise transfer and shall inhibit condensation on any of the internal surfaces of the framing
members.
g) The interfacing joint between the door leaf and the door frames shall incorporate two perimeter
sealing gaskets inserted into corresponding grooves in the framing profiles to create the

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external rain barrier and the internal airtight vapour barrier. The space between these gaskets
shall be ventilated and drained to the outside of the door assembly.
h) The metal framing for the framing of the leaf for the doors shall be detailed to allow for the
secure installation of continuous weather sealing gaskets within the framing.
i) All ironmongery shall be **satin stainless steel/bronze**, pull handles, locks, etc. to be agreed
with the Architect. See also Section P21.
H11.2214 Framed Glazed Doors

a) Where forming solid doors within the system, doors shall be robust 'heavy-duty' grade doors to
DD171 and PAS 24, with stainless steel (grade 1.4401) frames designed to prevent the
ingress of water and tested as specified for water penetration and air permeability.
b) Provide prefabricated, unitised aluminium frames incorporating single leaf doors with structural
silicone glazing, fabricated in thermally broken or separated aluminium extrusions.
c) Hinged doors shall be rebated and hung on grade 1.4401 stainless steel hinges and fully
weather-stripped at head, jambs and sills with compression seals. Pivoting doors shall
incorporate heavy-duty hung-pivot mechanisms to suit door design and to prevent ingress of
water.
d) Allow for thermally broken framing members for the leaf of the doors to suit the door weight and
size. The framing shall be assembled as composite framing profiles with a proven continuous
thermal break material. The thermal break system shall minimise the thermal transmittance and
noise transfer and shall inhibit condensation on any of the internal surfaces of the framing
members.
e) The leaf of the doors shall be fixed into the supporting glazed walling system by means of
heavy-duty hinges manufactured from stainless steel or with sliding door gear mechanisms as
specified. The interfacing joint between the door leaf and the door frames shall incorporate two
perimeter sealing gaskets inserted into corresponding grooves in the framing profiles to create
the external rain barrier and the internal airtight vapour barrier. The space between these
gaskets shall be ventilated and drained to the outside of the door assembly.
f) The metal framing for the framing of the leaf for the doors shall be detailed to allow for the
secure installation of continuous weather sealing gaskets within the framing.
g) All ironmongery shall be satin stainless steel, bronze or anodised aluminium, pull handles, locks,
etc. to be agreed with the CA. See also Section P21.
H11.2215 Ironmongery
a) Allow for co-ordination of all ironmongery with the security Contractor and provide ironmongery
and wireways as required. Doors shall include concealed door contact magnets to be
integrated into the design of the door for connection to the B.M.S. Provide Access Control as
required (refer to the M&E Specification for requirements). Conceal all wiring within framework.
Mount all access control equipment recessed flush into door frames as side panels. Develop
details with M&E and Security Sub-Contractors and agree with the Architect.
b) External swing doors shall incorporate the following:
i) Concealed head mounted overhead door closers to minimum class C to BS EN 1154
with fully adjustable spring power and backcheck facility.
ii) Hinged doors shall be rebated, hung on heavy duty bronze, bronze or anodised aluminium
hinges and fully weather-stripped at head, jambs and sills with compression seals.
Pivoting doors shall incorporate heavy-duty hung-pivot mechanisms to suit door design
and to prevent ingress of water.
ii)iii) D line satin stainless steel, bronze or anodised aluminium pull handles both inside and
outside, 19mm diameter, as scheduled in lengths as indicated on the Tender Drawings
and Door/ Ironmongery Schedules, using satin stainless steel (Allgood Ltd 'D line' or
acceptable equivalent).
iii)iv) Keyed locks of the pin tumbler, cylinder high security (anti-pick) type, with a minimum of 6
pins. Double cross cut or side-pin cylinders shall be removable when the door is open but
shall not be removable when the door is closed.
iv)v) Locking and latching devices shall be suited to the door design and shall comply with the
requirements of BS EN 12209 category B locks and latches.
v)vi) Suiteing to be co-ordinated with suiteing requirements for the building as a whole. Refer
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to Section P21.
vi)vii) Automatic power operated doors shall comply with BS 7036.
c) Where required, make provision for doors to remain in defaulted 'open position' in the event of a
fire emergency.
Glazing
H11.2216 Systems Generally

a) Select all glazing materials and systems to comply with the performance requirements.
b) Final selection of glass, thicknesses, together with type/heat treatments and location of
interlayer and coatings, shall remain the Contractor's responsibility.
c) Glass and coatings shall be in accordance with Section Z25 of the Specification.
d) Safety manifestation: Refer to the Design Drawings and Section Z25 of the Specification.
e) Unless otherwise specified or agreed with the Architect, solar and low e coatings to be
deposited under vacuum by magnetron sputtering process and which shall be located within
the cavity of the double glazed unit.
f) Panes to be separated by 16mm black or dark coloured bent spacer tube, automatically filled
with desiccant.
g) Spacer tubes shall be permanently sealed to the glass by a primary sealant in PIB and the entire
structure to be provided with a secondary sealant in silicone.
h) The solar performance criteria stated herein shall be achieved to +/-2% and measured in
accordance with EN 410. Emissivity coatings shall be measured to comply with
EN673/EN1298 and with tolerance of +/-0.1W/m²K.
i) Cavities of double glazed units to be filled with dehydrated air.
j) Glazing with SSG to have polished edges and corners.
H11.2217 Inclined Glazing

a) Inclined glazing shall comply with the Specification except that the rafter bars/transoms shall
drain directly to the outside at the bottom. Pressure plate fixing screws shall be sealed over with
low modulus clear silicone sealant.
b) The extrusion designers shall be consulted and their recommended torque settings used for
securing pressure plate fixing screws.
GRC
H11.2218 GRC Panels and screens to cladding system Generally

a) The panel units shall be manufactured to sizes indicated on the Working Drawings, and be
within the specified tolerance deviations.
b) Submit details of fixing proposals for review by the Architect.
c) Refer to the Design Drawings for details of pattern types.
d) Bird mesh/spikes are to be integrated in a discreet manner during manufacture. Locations as
shown on design drawings.
e) Working Drawings shall show the final design while strictly maintaining the design intent visual
requirements.
f) Note that double casting of some profiles will be necessary as shown on the design drawings.
g) GRC:
i) Sand: Local Silica sand to GRCA `Specification for the manufacture, curing and testing of
GRC products’, clause 2.3. Make provision for additional aggregate and natural mineral
pigments as may be required to achieve the desired colour if necessary. Ensure that all
aggregate is evenly distributed and suspended throughout the mix without heavy
aggregate particulates settling during curing.
ii) Cement: To BS EN 197: Part 1, CEM 1 Portland cement.

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iii) Glass fibre:

• Type: Alkali-resistant continuous filament fibre. To be compatible with Portland
cement.
• Compliance: In accordance with GRCA ‘Specification for alkali resistant glassfibre
rovings and chopped strands for reinforcement of cements and concretes’.
• Content shall be determined in accordance with BS EN 1170.
iv) Mix design and grade shall be determined by the Contractor in accordance with GRCA
`Specification for the manufacture, curing and testing of GRC products’, clause 3.1, for
v) Mechanical properties of the GRC to be consistent and suited to the various profiles,
shapes, spans etc as required to meet the performance criteria.
vi) Mixing water:
• To BS EN 1008.
• Water shall be clean and free of impurities that may affect colour, stability, setting or
strength of panels.
vii) Admixtures:
• Submit proposals of proposed types.
• Calcium chloride based admixtures shall not be used where GRC contains cast-in
steel components or fixings.
• Not to contain more than 0.1% chloride Ions.
viii) Pigments:
• Colouring Agents/Pigments: To ASTM-C979 (Standard Specification for Pigmets
for Integrally Coloured Concrete). Only natural mineral pigments shall be used and
must be an alkali and UV resistant, permanent and fade resistant integral through
colour to achieve colour of colour sample provided with Tender Documents. The
colour shall be as uniform and streak free as can be achieved using natural mineral
pigments. To be compatible with all other constituents of the mix such as
aggregates and Portland cement etc. No artificial pigments are permitted toshould
be added.
• The final selection of colour will be dependant upon the submitted samples
specified herein and the selection of the CA.
ix) Samples:
• Provide a range of samples defining the upper and lower limits of variations in
colour.
• Sample range shall demonstrate that even distribution of aggregate can be
achieved to prevent settlement during curing.
• Sample range shall demonstrate that control of colour and colour shading can be
achieved to reduce colour and colour shading fluctuations.
ix)x) Surface coatings: Provide proposals for acceptance by the CA.
x)xi) Panels to be sufficiently thick sheets as required to satisfy the design intent and the
performance criteria.
xi)xii) All surfaces to have eased corners.
xii)xiii)GRC to have acid etched finish texture and colour to be selected from the range of
proposed samples by the Architect.
h) Fixings:
i) All fixings shall be concealed. Fixing methods to be selected to suit the expected thermal
and moisture movement, shrinkage, hydration and the nature of materials to be fixed to as
well as the performance criteria to be satisfied. Provide suitable stainless steel bracketry
as required.
ii) All dissimilar metals to be separated to prevent bi-metallic corrosion.

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i) All screens to be demountable.

j) Curing:
i) Curing methods are to ensure sufficient strength is achieved to meet the design intent
and structural requirements.
ii) Panels must be kept continually moist during curing or the use of an acrylic thermoplastic
copolymer dispersion with the agreement of the CA.. Duration of curing times to be as per
the manufacturers instructions and suitable for the local conditions.
All reinforcement to be provided to GRC profiles as required to meet the performance requirements.
Provide continuous stainless steel edge framing (picture frame) to GRC panels for support purposes
cast flush into GRC as shown on the design drawings, unless it can be demonstrated to the CA that
this is not required.
H11.2119 Copings Generally

a) Aluminium copings comprising fully welded and/ or sealed coping system incorporating a
waterproof membrane underneath dressed down to roofing and cladding waterproofing as
required. Coping to have finishes as specified for the cladding types. Joints to occur as shown
on the Design Drawings. Where not indicated they should be located to coincide with cladding
grid.
b) Joints to be fully gasketed with recessed/ folded interconnecting joints to provide a neat flush
external appearance. Gaskets shall not be visible at joints.
c) Aluminium sheet shall be sufficiently thick or have suitable rigidising backing board to provide a
visually flat surface and to eliminate excessive distortion and permanent deformation caused by
solar radiation (min. 3mm).
d) Aluminium copings shall be formed from aluminium alloy sheets, fabricated from the most
appropriate grade and thickness of material complying with BS EN 485, BS EN 515 and BS
EN 573, in a temper suitable for the particular type of application and degree of forming to be
used. In addition, the alloy shall be selected to satisfy the requirements of the chosen finishing
process.
e) Gauge the selection of aluminium thickness/ profile and requirements for reinforcing, bracketry
and fixings to accommodate loads associated with wind loading as well as normal maintenance
access traffic (not generally to be designed to be walkable unless otherwise indicated on the
Tender Drawings).
f) Provide special corner pieces for changes in direction as shown on the Tender Drawings.
g) The coping systems shall be weatherproof and watertight, thus ensuring the prevention of water
leakage onto the internal face of the works, and any other part of the system, which may be
adversely affected.
h) All coping systems to be designed and installed to accommodate thermal expansion.
i) Gaskets shall be made of ethylene propylene material (EPDM/ EP). The colour of all gaskets
shall be black.
Flashings
H11.2220 Flashings
a) As indicated on the Design Drawings, aluminium flashings shall be provided. They shall be
treated with anti-drumming insulation on the protected face if required.
b) Flashings shall be PVF4 coated to match the cladding.
c) Externally exposed flashings shall have continuation and interconnecting joints fully complying
with the sealant manufacturer’s written recommendations for movement joints; simple butt
straps shall not be accepted.
Fixings
H11.2221 Fixings Requirements

Fixing components shall comply with all statutory requirements (and be to the acceptance of the
District Surveyor/ Building Control Officer/Structural Engineer) both as to strength and type and shall
be designed to carry all dead, live and wind loading under due consideration of any applicable
thermal movements. Select suitable components and fixings in accordance with the following:

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a) Stainless steel fixing components for the works shall comprise components of high grade
austenitic stainless steel exterior quality to BS EN 10088, BS EN 10084, BS EN 10087, BS
EN 10095, BS EN 10048, BS EN 10051, BS EN 10250: Part 4 and BS EN ISO 9445 and BS
8298.
b) Fixing bolts, nuts, screws, washers, etc. shall be manufactured from high grade austenitic
stainless steel complying with BS EN ISO 3506: Parts 1 and 2. All screw fixings and
attachments shall be secured against vibrating loose.
c) All fixing brackets for the works shall comprise components of high grade austenitic stainless
steel exterior quality, grade 1.4401 to BS EN 10250: Part 4, BS EN 10084, BS EN 10095, BS
EN 10029, BS EN 10048, BS EN 10051, BS EN 10258, BS EN 10259 and BS 8298,
complying with all statutory requirements both as to strength and type and shall be designed to
carry all dead, live and wind loading under due consideration of any applicable thermal
movements.
d) Any sheet mild steel used in the fixing assemblies shall comply with BS 7668, BS EN 10029,
BS EN 10210 and BS EN 10025: Parts 1-4 and 6 and rolled sections shall be used wherever
practicable or appropriate. Steel sections used shall be hot-dip galvanised to the requirements
of BS EN ISO 1461 after all cutting, drilling of holes and welding has been completed.
e) All non-visible supporting aluminium sub-constructions shall be corrosion protected. Mill
finished aluminium shall not be used. Aluminium sub-constructions shall be separated from
concrete by bitumen paint or similar acceptable method. Austenitic stainless steel to BS EN
10088 may be used in lieu of aluminium for any supporting sub-constructions.
f) Ensure all fixings remain firm (i.e. do not loosen from their set positions) under vibration loads.
g) Refer to Section Z20 for fixings generally.
h) Details describing the design, materials, location and installation procedures of all anchorage
and fixing supports shall be fully described in the Shop Drawings.
i) Floor anchors cast into the concrete structure shall be non-corrosive.
j) Fixings shall be designed to ensure that they are not visible internally or externally in the
completed works, unless clearly shown on the Working drawings and accepted by the
Architect.
k) **Visible fixings shall comprise **hex-headed** bolts with **hex-headed** nuts, ensuring that
bolts are not excessive in length.
H11.2222 Fixing Directly to Concrete Structure

a) In general, cast-in channels shall be the method of connecting the façade brackets to the
structure.
b) Provide and install all fixing devices, including framing, bearing brackets, movement fixings, etc.
and carry out all necessary preparation work such as drilling, plugging, screwing, bolting,
cutting for anchor bolts or sockets to be cast in, making good, including grouting-in of anchor
bolts, and fixing whatsoever necessary.
c) All fixings shall be to the slab edge face condition, to be co-ordinated with the superstructure
design.
d) Submit details of all fixings for review and acceptance by the Architect.
e) The contractor shall provide suitable cast-in brackets/fixings as required. Refer to the structural
engineers documentation and liaise with the relevant superstructure contractor to finalise the
detailing and all interfacing requirements.
Sealants and Gaskets
H11.2223 Sealants
a) Sealant shall not leak or bleed causing any discolouration and runoff staining below or above
horizontal joints shall be avoided either on stone facing or on elements.
b) Structural Silicone Sealants:
i) All glazing requiring structural silicone bonding shall be glazed under controlled factory
conditions without any need for Site applied structural bonding sealant, unless accepted
otherwise by the Architect.
ii) Structural sealant glazing design shall limit the design tensile stress of sealants to

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138kPa.
H11.2224 Gaskets
a) Gaskets shall be made of either Ethylene Propylene material (EPDM/EP) or of Silicone. The
colour of all gaskets shall be black.
b) All visible room side glazing gaskets shall have factory vulcanised corners. All other gaskets
shall have overlapping joints with appropriate sealant in between. It is a condition that the
internal sealant of the entire envelope system has a continuous vapour and air seal. This also
includes all interfacing connections.
Miscellaneous Materials
H11.2225 H11.2225 Metal Studwork

a) Metal studs shall be fabricated from galvanised mild steel (or stainless steel if not accessible for
maintenance) designed to suit the wind loading requirements and loads associated with the
outer screen cladding systems and surface fixed components as required.
b) The framing/ stud system shall be fully concealed with appropriate fixings to the primary
structure soffit/ floor/ walls, etc. ensuring compliance with the design requirements of the
Specification.
c) Framing to be designed to accommodate fixings related to any face fixed cladding systems.
Where fixings penetrate the breather membrane ensure that a water and vapour tight seal is
achieved.
d) Provide windposts as required, designed to meet the wind loading criteria specified.
e) Refer to Section Z11 of the Specification for steel generally.
H11.22265 Breather Membrane

a) Material: High performance reinforced membranes of foil or plastics, protected both sides by
rigid facings/linings to give a Class 0 spread of flame to meet the performance criteria
specified.
b) Fix carefully and neatly to provide a complete barrier to water, snow and wind blown dust.
Horizontal laps to be 100mm, vertical laps 150mm and staggered, to shed water away from the
substrate and structure.
c) Provide all sealing at junctions as required.
H11.22275 Vapour Barrier

Provide an suitable barrier fully continuous to warm side of insulation and fixed to the cavity side of
the backing wall system as shown on the Design Drawings.
H11.22284 Damp-proof Membrane

a) The membrane shall be impermeable, rot-proof and resistant to specified extremes of movement
and environmental temperatures. The membrane shall be vapour resistant, vapour permeable
and airtight where necessary.
b) Submit details of proposed materials for review.
c) The material shall be composed of elastomer base (EPDM), or equivalent.
d) Substrates to receive bonding shall be free from dust and grease, free of cavities, ridges and
sharp projections and be primed to receive adhesive as recommended by the membrane
manufacturer. Surfaces that are not suitable to receive membrane shall be reported to the
Architect.
e) Membrane shall be lapped at least 100mm and bonded according to the manufacturer’s full
recommendations.
f) Other materials/testing standards may be put forward for review by the Architect.
H11.22295 Insulation
a) The insulation shall be inert, durable, rot-proof and vermin-proof and not be degradable by
moisture, extreme temperatures or water vapour.
b) The insulation shall not bulge, sag, delaminate or detach during its installation or in situ during
the life of the works.

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c) Insulation shall be LPCB certified to LPS 1181.

d) Insulation shall have zero Ozone Depleting Potential (ODP), be CFC and HFC free and have a
Global Warming Potential (GWP) of less than five. Refer also to Section A.6000 of the
Specification.
e) ***Insulation shall be selected to meet the recommendations of ‘The Green Guide to
Specification’ and shall have a minimal environmental impact when assessed using BREEAM
criteria.***
f) The selected insulation shall comply with all relevant British Standards and be BBA certified.
H11.223025 Standard Plasterboard

Aerated gypsum core plasterboard to BS 1230: Part 1, classification type 1, with exposed surface
suitable for decoration and tapered edges for smooth seamless jointing or square edge boards for
surfaces to be finished as required.
H11.223125 Moisture Resistant Plasterboard

To BS 1230: Part 1, types 3 and 4 with moisture resistant core and moisture repellent paper facings.
Moisture resistant plasterboards (where specified as such) shall have moisture resistant liners with
additives, silicone or equivalent, to improve moisture resistance to absorb less than 5% of water by
weight in the total immersion test when tested in accordance with BS 1230: Part 1, and ASTM C
473 and less than 100g/ m² (BS 1230) of water in the surface water absorption tests.
H11.223225 Impact Resistant Plasterboard

Heavy-duty paper faced plasterboard with high density core to BS 1230: Part 1, classification type 5,
with exposed surface suitable for decoration and tapered edges for smooth seamless jointing.
H11.223325 Foilbacked Plasterboard

Moisture resistant gypsum plasterboard with a metallised polyester film backing water vapour control
layer. The plasterboard base shall be to BS 1230: Part 1 with moisture vapour resistance of backing
layer not less than 60 MNs/ g.
H11.223425 Fire Resistant Plasterboard

Gypsum plasterboard with glass fibre and additives in core to improve fire resistance to BS 1230:
Part 1, classification type 5 and tested to BS 476: Parts 6 and 7 with exposed surface suitable for
decoration and tapered edges for smooth seamless jointing. Board to be moisture resistant where
required.
H11.223525 External Grade Board

Suitable proprietary external grade boards to be proposed by the Contractor.
Cladding Support Structure
H11.223626 Supports – All Architectural Steelwork

Provide a structural steel cladding support structure, as necessary, having due regard for any
requirements in excess of that indicated on the Structural Engineer's Drawings and also any
requirements indicated on the Design Drawings. The structural steelwork shall comply with the
Structural Engineer's Steelwork Specification, including protective coatings.
Timber
H11.223727 Timber Generally

a) No damaged, rotten or discoloured materials shall be used.
b) Materials shall be relatively knot free, free from distortion, cracks or other blemishes.
c) All timber shall be selected for its final use:
i) If it is to be for internal use, timber shall be graded and stamped DRY or KD (kiln dried)
and shall have a moisture content of 20% or less.
ii) Where timber is to be used externally or in other high moisture content areas it shall be
graded and marked “wet”. Such timber shall not be used internally.
iii) All of the above are particularly important for dry structural timber.
d) Structural timber work shall be as indicated on the Design Drawings and described in the

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Specification, designed to BS 5268 where applicable, or to the requirements of the

Specification.
e) All structural timber design and details shall comply with BS 5268 and satisfy the stated
loading requirements. Otherwise it shall be calculated from the information available and shall
satisfy the criteria in BS 5268.
f) All Shop Drawings shall include:
i) The geometry of the structure.
ii) Timber species, sizes and grades.
iii) All joints not detailed on the Design Drawings, including locations, and evidence in writing
that the joints are structurally adequate.
g) Where designed structures cannot be calculated in accordance with BS 5268: Part 2,
acceptance shall be sought from the CA, provided that the design requirements are satisfied
when tested to BS 5268: Part 2. The CA shall be notified at least 7 days prior to the date of
testing in order that he may be present when the structures are tested.
h) Moisture content at the time of erection shall not be more than:
i) Under cover in generally unheated spaces 24%.
ii) Under cover in generally heated spaces 20%.
iii) Internally in continuously heated spaces 20%.
i) Note that cross section dimensions of timber shown on the Design Drawings shall be
considered as basic sizes unless otherwise indicated.
j) Reduction to finished sizes of planed/regularised timber shall be carried out to BS EN 1313:
Part 1 for softwood and BS EN 1313: Part 2 for hardwoods.
k) The warping limits set down in BS 4978 for the amount of bow, spring, twist and cup in a piece
of timber shall not be exceeded.
l) Timber members that are damaged, crushed or split beyond the limits of their grading shall not
be used.
m) Scarf joints, finger joints or splice plates shall not be used without the acceptance of the CA.
n) Notches and holes shall be positioned in relation to knots and other defects such that the
strength of members shall not be reduced.
o) When processing treated timber, ensure that as much cutting and machining as possible is
carried out before treatment.
p) All timber, which is sawn along its length, ploughed, thickness planed or otherwise extensively
processed shall be retreated with the original treatment.
q) Minor cuts and drill holes that reveal untreated timber shall be treated with a solution
recommended for the purpose.
H11.223828 Stress Grading of Timber

a) The Contractor shall ensure that all structural timber is suitably stress graded to suit the
application.
b) Stress grading of timber shall only be carried out by companies that are currently registered
under a third party quality assurance scheme operated by any of the certification bodies
approved by the UK Timber Grading Committee.
c) Timber with a basic thickness of less than 150mm and not specified for wet exposure shall be
stress graded at a moisture content not exceeding 20%, and clearly marked ‘Dry’ or ‘KD’ (kiln
dried).
d) Timber graded WET and specified for wet exposure conditions shall be clearly marked as ‘Wet’.
e) Structural timber members, which are cut from larger graded sections, shall be regarded for
acceptance and then appropriately marked according to the new grade.
f) Hardwood shall be stress graded to BS 5756, grade HS or other national equivalent and shall
be marked accordingly. Softwood shall be graded according to BS 4978 or other national
equivalent and be marked accordingly.

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g) Preservative Treatment: As Section Z12 and the British Wood Preserving and Damp-proofing
Association Commodity Specification C7.
h) Glued laminated timber shall be manufactured to BS EN 386, BS EN 391, BS EN 392 and BS
5268: Part 2 from stress graded timber, which shall be free from active attack by insects or
fungi, and shall have the required properties to suit the structural requirements.
i) Adhesives shall be to BS EN ISO 9665 or to the manufacturer’s specification.
H11.2300 FABRICATION
H11.2301 Fabrication of Walling Systems
a) Unless otherwise specified or agreed, curtain walling shall be fabricated as a unitised system.
b) Fabricate sections to accommodate and interface with work of other adjacent works by means
of rabbets, interlocks, miscellaneous angles, trim and filler sections, as required.
c) Component fastenings shall be concealed throughout, shall be of adequate strength, fabricated
from aluminium or stainless steel and shall be fusion welded where required. Jointing and
intersections of the metal shall be accurately cut and fitted to a tolerance of 1mm in true planes
with adequate concealed fastenings and sealed. Welds shall be ground smooth and flush,
buffed and polished so that they are indistinguishable from surrounding metal.
d) Reinforce mullions with aluminium or stainless steel sections as required. Secure aluminium
sections with adequate anchors to structure.
e) All gaskets shall be free from all contact and migration stain and compatible with all substrates,
sealants and finishes with which they have contact. Refer to Section Z36.
f) Provide inconspicuous, baffled weepholes to properly vent, and drain system cavities to exterior.
g) Fabricate glazing recess of sufficient depth to cover glass edge-seal. Refer to Section Z25.
H11.2302 Structural Glazing

a) Structural glazing shall only be carried out in the factory. No structural glazing will be permitted
on site, except for replacement of broken or sub-standard glass or for 'come back' work.
b) Primers and cleaners and their application shall be strictly as recommended and approved by
the silicone glazing manufacturer.
c) Identify each curtain wall panel by a number, record the date of assembly, silicone type and
batch, curing time, temperature and humidity within the plant at time of assembly.
d) Refer to Sections Z22 and Z25 and fabricate in accordance with Guideline for European
Technical Approved for Structural Sealant Glazing Systems (SSGS) ETAG No. 002.
H11.2303 Tolerances for Manufacture and Element Fabrication
a) Take into account the required erection tolerances during fabrication and ensure that the
Detailed Design accommodates these. These erection tolerances may impose tighter
fabrication tolerance requirements to ensure that the erection tolerances are achieved.
b) Assembly: The physical fitting together of any assembly of sub-elements shall be properly
allowed for in the Detailed Design of the corresponding sub-elements.
H11.2304 Welding Procedures

a) Welding for mild steel shall be in accordance with BS EN ISO 15614: Part 1.
b) Welding for stainless steel shall be in accordance with BS EN 1011: Part 3. Remove heat
marks using light abrasives, wire brushing or other suitable means in order to match specified
finish.
c) Welding for aluminium shall be in accordance with BS EN 1011: Part 4.
H11.2305 Tolerances for Manufacture

a) The following tolerances apply to each individual component:
i) Length/Width: Maximum allowed deviation is the lesser of 1.5mm up to 3000mm and
3.0mm above 3000mm of design dimension.
ii) Thickness/Depth (extrusion tolerances nominally): Maximum allowed deviation is ±0.5mm.

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b) Panel Flatness
i) The panels shall achieve the flatness criteria stated in clause H11.2306 by provision of
stiffeners as necessary or the acceptable composite build-up. On no account shall the
stiffening or other method of achieving the flatness tolerance be visibly apparent in the
completed works.
ii) The Contractor shall provide visual prototypes and full size samples of the cladding
panels for the Architect’s review and acceptance.
H11.2306 Tolerances for Component Assembly

a) Assembly: The physical fitting together of any assembly of sub-elements shall be properly
allowed for in the Detailed Design of the corresponding sub-elements.
b) Comply with the following tolerances during assembly of components:
i) Level of horizontal members: ±1mm from datum in 1500mm non-cumulative.
ii) Plumb of vertical members: ±1mm to the vertical in any 1500mm, non-cumulative.
iii) Squareness: Any diagonal length across the panel shall not deviate by more than the
lesser of ±3mm or ±0.075% of design dimension.
iv) Bow: The centre section of the element shall not bow by more than the lesser of 3mm or
0.075% of the length of the element measured from a straight line between the ends of
the element.
v) Straightness: Any surface or edge shall not deviate by more than 1/1000 or 1.5mm from
a 2m straightedge placed against it in a direction parallel to the long axis of the element.
vi) Flatness of panels/framing: Any surface shall not deviate by more than 1/1000 or 1.5mm
from a 2m straightedge placed against it in any direction.
vii) Twist: No section of the element may be twisted by more than 1° from the section at
either end of the element.
c) All finished metal surfaces shall be free from undulations and irregularities.
i) Twist: ±1.5mm - there shall be no warping of frame.
ii) Line of panel: ±2mm overall difference between adjacent standards.
d) Tolerances shall not be cumulative.
H11.2307 Tolerances for Manufacture of GRC Panels

a) Deviations in panel length, width and diagonal dimensions shall not exceed ±1mm.
b) The twist and warping shall not cause any point of the panel shall be more than 0.5mm out of
plane. The twist and warping shall not cause any point of the structural frame to be more than
2mm out of plane.
c) Alignment of joints between panels shall not exceed ±2mm.
d) Alignment of the faces between panels shall not exceed ±1mm.
H11.2308 Manufacture for GRC

a) The panels shall be manufactured off site in controlled factory environment to BS EN 1169.
b) Check the overall dimensions, straightness, squareness, twist and flatness of the moulds
immediately before each reuse and of each unit as soon as possible after demoulding. Make
adjustments to moulds as necessary.
c) All hand forming details shall be carried out before the material has achieved its initial set, to
ensure complete bonding.
d) Curing methods shall be adopted to achieve sufficient strength fro the demoulding process.
H11.2309 Timber Generally

a) Note that cross section dimensions of timber shown on the Design Drawings shall be
considered as basic sizes unless otherwise indicated.
b) Reduction to finished sizes of planed/regularised timber shall be carried out to BS EN 1313:
Part 1 for softwood and BS EN 1313: Part 2 for hardwoods.

rooflight system.
20/8/06/07
c) The warping limits set down in BS 4978 for the amount of bow, spring, twist and cup in a piece
of timber shall not be exceeded.
d) Timber members that are damaged, crushed or split beyond the limits of their grading shall not
be used.
e) Scarf joints, finger joints or splice plates shall not be used without the acceptance of the CA.
f) Notches and holes shall be positioned in relation to knots and other defects such that the
strength of members shall not be reduced.
g) When processing treated timber, ensure that as much cutting and machining as possible is
carried out before treatment.
h) All timber, which is sawn along its length, ploughed, thickness planed or otherwise extensively
processed shall be retreated with the original treatment.
i) Minor cuts and drill holes that reveal untreated timber shall be treated with a solution
recommended for the purpose.
H11.2400 FINISHES
H11.2401 Finishes GenerallyColours
a) Colours to be to RAL colours or anodising colours and specified by the Architect. PVDF and
polyester powder coatings. Colours to be determined on the basis of samples provided for
b) All finishes shall be of sufficiently durable quality to suit the prevailing environmental conditions
including wind-blown sand. Refer to Section Z31 for polyester powder coatings, Section Z32
for anodising and Section Z32 for PVDF coatings.
c) Timber finish is to be a vacuum/pressure impregnated stain with a maximum 10% gloss to
achieve consistency throughout the depth of the timber so there is no colour difference should
the timber be scratched, knocked or damaged in any way.
d) The visual appearance of the timber shall be ‘natural’.
H11.2500 ANCILLARIES
Lightning Protection and Earth Bonding
H11.2501 General
a) Bonding is required between individual sections of cladding, in accordance with BS 6651 and
BS EN 62305: Parts 1-4, to ensure continuity between adjacent sections, both vertically and
horizontally over the whole façade. Bonding between sections shall have a minimum cross
section of 50mm².
b) Bonding between the cladding and structural steelwork shall be carried out at intervals at no
greater than 10m horizontally and 20m vertically. The first level of bonding to the structural
steelwork shall be at the highest floor level of each part of the building.
c) Provide studs/bolts on the cladding for subsequent connections to be made by the lightning
protection contractor.
d) All straps/connections shall be concealed.
e) ***No straps shall be fixed along copings.***
Fixing Brackets for Blinds
H11.2502 General
a) Fixing brackets shall be provided fixed to the framework as indicated on the Design Drawings.
b) Brackets shall be compatible with the blinds proposed for incorporation.
c) Some blinds will need to be removed for cleaning and maintenance purposes. Refer to design
drawings.
Cradle Restraints
H11.2503 Cradle Restraint Sockets

a) Include into the façade design the integration of stainless steel sockets provided by the Façade

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20/8/06/07
Access Equipment sub-contractor, to act as cradle lateral restraints as required under BS EN

1808.
b) The locations and type of socket, including their mounting shall be advised by the Façade
Access Equipment sub-contractor.
H11.3000 SITE INSTALLATION
H11.3100 WORKMANSHIP
H11.3101 Generally
a) All works shall be true to detail with continuous profiles, free from marks, defects, flaws, steps,
waves, or damage of any nature.
b) Dimensions and levels of the structure shall be verified.
c) The glazing works shall be set out such that all framing members are installed in the correct
position, within tolerance, and in the correct relationship to the building structure.
d) All fixing bolts and anchors shall be installed in accordance with the manufacturer's
recommended procedures.
e) Materials shall be kept dry until fixed.
f) Acceptance shall be obtained from the Architect before drilling or cutting parts of the structure,
other than where shown on the Working Drawings.
g) Isolating tape, plastic washers or other suitable means shall be used to prevent bi-metallic
corrosion between dissimilar metals.
h) Bars shall be set out at evenly spaced centres, straight, parallel and truly aligned with other
features where shown on the Working Drawings.
i) The finished work shall be square, regular, true to line, level and plane with a satisfactory fit at all
junctions.
j) Ensure that all interfacing requirements relating to fixings are provided. Liaise with the primary
structural steelwork/ concrete sub-contractor in due time prior to fabrication of structural
steelwork/ concrete to ensure that fixing holes, brackets, lugs, etc. are provided in correct
locations to agreed tolerances suitable for fixing curtain walling system as required.
k) Ensure that any remedial works are carried out where damage to structural steelwork finishes or
corrosion protection occurs.
l) Ensure that all interface requirements are provided relating to lightning protection and earth
bonding.
m) Ensure that all interfaces with roof covering systems and associated flashings are
accommodated as indicated on the Design Drawings.
n) Ensure that interfaces with internal bulkhead ceiling linings are accommodated.
o) Ensure that all interfaces with internal partitions and floor slabs are accommodated including
requirements for providing continuity of fire and acoustic separation as required.
H11.3102 Blinds Generally

a) Install blinds to minimise the light leakage through the installation in the closed position.
b) Assemble the blinds completely in the fabrication shop prior to delivery to Site. Test each blind
for proper performance prior to packaging.
c) Secure the blinds with appropriate fixing brackets to withstand all operating forces. Accurately
level the head rail to ensure that the blinds hang vertically or parallel to the walls/ mullions, etc.
which require tolerances.
d) Adjust to provide an equally spaced, vertical and level system. Adjust the lift wires/ tapes to
ensure that the Blinds are parallel in the raised and halfway position.
e) Adjust the installation to ensure that the blinds hang correctly and operate smoothly with edges
aligned and correctly spaced. When operated, the Blinds must stop at the open, closed and
predetermined intermediate position with their bottom edges aligned and parallel to the floor.
f) Store installed blinds/ shades in their fully retracted position to avoid damage and accumulation

rooflight system.
20/8/06/07
of dust and dirt until Practical Completion.

g) Retain the protective covering in position, for as long as is practicable. Each individual blind
shall be signed off as in working order with the Architect.
H11.3103 Quality of GRC Finishes

a) The panel finishes shall be uniform in colour, texture and appearance, unless specified
otherwise.
b) Panel finish shall match the agreed Control Samples. Disregard and replace any units that do
not appear identical to the accepted samples.
H11.3104 Timber Workmanship Generally

a) The installation shall comply with BS 8000: Part 5.
b) When instructed by the CA, timber sections shall be tested with an approved electrical
moisture meter, which shall be used in accordance with the manufacturer’s recommendation.
i) 5% of material shall be tested but not less than ten lengths of each cross section shall be
tested at the centre of the length.
ii) 90% of values given shall be within the specified range. All results shall be provided to
the CA in writing.
c) Timber:
i) Shall be kept dry and not subjected to overstress, distortion or disfigurement of sections
or components during transit, storage, lifting, erection or fixing.
ii) All timber for external use shall be kept so that it meets the requirements of i) above but
also so that its moisture content does not change significantly from when it was graded
‘WET’.
iii) Timber and components shall be stored under cover, clear of the ground and with good
ventilation. Level bearers on a dry firm base shall provide support at regular intervals. Any
pile shall be opened to ensure free movement of air through the stack.
iv) The sequence of construction shall be arranged so that the timber is protected prior to
use in the construction, while it is being mounted in the construction and subsequently
maintained.
v) Trussed rafters shall be kept vertically during handling and storage.
d) All exposed end grains shall be sealed with a suitable clear end grain seal before delivery to the
Site.
e) Pelletting: Screw heads shall be countersunk 6mm below the timber surface and grain-matched
pellets not less than 6mm thicker shall be glued into place. Pellets shall be cut from matching
timber.
f) Temporary bracing shall be provided as necessary to maintain structural timber components in
position and to ensure complete stability during construction.
H11.3200 TOLERANCES
H11.3201 Installation
a) The works shall be installed to meet the tolerances as specified below. These tolerances shall
be adhered to for the works in its completed installed condition. Make due allowance for any
structural movements and deviations including deformations caused by the installation itself
due, for example, to the effect of the self-weight of the cladding on its supporting structure. In
this respect, refer to the Project Common Movement and Tolerances Report document. In the
case of any doubt seek further advice from the Project Structural Engineer regarding the
deformations which shall be allowed for in the Detailed Design and installation.
b) Level: Set out following horizontal bands, each corner of the panel shall be placed to within
2mm of the design dimension to the corresponding Horizontal Location Reference Plane.
Further, the bottom edge of each cladding panel, based on the mean level of the respective
bottom corners, shall be placed to within ±1mm of the design dimensions from the
corresponding Location Reference Plane. Unless otherwise stated, the Location Reference
Plane shall be defined as the horizontal plane through the mean level of the tops of the primary
edge beam elements or slab edge to which each horizontal cladding panel band is

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20/8/06/07
placed/suspended.
c) Plumbness: Each panel’s reference face (exterior face for external cladding, visible face for
single side exposure panels) shall be installed such that the respective offset distances of the
top and bottom edges of the panel to an adjacent true vertical line (plumbline) do not differ by
more than 2mm or 0.1% of the height of the panel, whichever is less.
d) Panel Plan Alignment: The panels shall be installed such that the distances of the respective
corners of the reference face to the cladding Location Reference Plane are within 3mm of the
Design Dimension and do not differ from each other by more than 2mm. This applies both to the
top and bottom edges of each panel. Unless otherwise stated, the Vertical Location Reference
Plane shall be defined as the mean plane of the edges of the primary edge beams or slab
edges corresponding to top and bottom widths of each cladding panel.
e) Transom alignment: The misalignment between the edge of a cladding panel and its supporting
transom shall not exceed 1mm.
f) Joints: Where adjacent elements are designed to have edges, lines or surfaces which line
through their common joint, the maximum allowed step across the joint is the lesser of ±2mm or
±10% of the joint width in any direction.
g) The works shall be erected plumb and in proper alignment and relation to established lines and
grades as shown on the Working Drawings. The erected system shall present true and accurate
lines and flat planes. Deviations from lines, planes and verticality shall be limited to long wave
formations of minimum wave length of 20m length with a rate of exchange not exceeding
1:1000 and a maximum amplitude of 3mm. All the above shall be measured from an optical or
laser reference line.
h) All tolerances stated shall be measured and monitored at a mean temperature to be agreed with
the Architect. Before work begins on Site the proposed method of dimensional setting-out and
cross-checking with adjacent trades and elements, to satisfy the accuracy requirements, shall
be submitted to the Architect. The checking of any setting-out or of any line or level by the
Architect, or his representative, shall not in any way relieve the Contractor of his responsibility
for the correctness thereof.
i) Alternative tolerances to those specified may be permitted at the Architect's discretion,
provided they are agreed in advance of the manufacture of components.
j) Tolerances shall not be cumulative.
H11.3202 Site Erection

a) Horizontal Plan Position: For any element at any level whose position is defined in relation to a
primary reference grid, the maximum allowed deviation from the Design Dimension to that
reference grid is ±2mm.
b) Where a series of elements are arranged in an array of two or more, the maximum allowed
deviation of the horizontal distance between any two adjacent elements is ±2mm from the
corresponding Design Dimension.
c) Verticality: For any element connecting two or more reference levels, the maximum allowed
deviation of the relative plan position in any direction of that element at any two successive
levels is ±2mm from the corresponding Design Dimension.
d) Planarity: Any element or group of elements whose position is defined from a reference plane
shall not deviate from the Design Dimension of the reference plane by more than ±2mm
measuring perpendicular to the defined plane.
End of Section

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20/8/06/07

H11 Roof and Wall Systems ............................................................................ 5

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Central Market Development, Abu Dhabi

H11.1000 SCOPE, SUBMITTALS, TESTING AND PERFORMANCE ............................. 5

H11.1100 SPECIFICATION AND SCOPE ....................................................................................... 5

H11.1200 SYSTEM DESCRIPTIONS/TYPES.................................................................................. 5

H11.1300 SUBMITTALS AND TESTING ................................................................................... 1211

Architectural Specification - Souk - Wall and H11/1 Foster and Partners

H11.1400 PERFORMANCE REQUIREMENTS......................................................................... 1919

H11.2000 SYSTEMS, MATERIALS AND FABRICATION ........................................... 2928

H11.2100 SYSTEMS .................................................................................................................... 2928

H11.2200 MATERIALS ................................................................................................................. 3433

Architectural Specification - Souk - Wall and H11/2 Foster and Partners

H11.2205 Stainless Steel Framing........................................................................................................................................................ 3636

H11.2300 FABRICATION ............................................................................................................ 4846

H11.2400 FINISHES ..................................................................................................................... 5049

H11.2500 ANCILLARIES ............................................................................................................. 5049

H11.3000 SITE INSTALLATION...................................................................................... 5149

H11.3100 WORKMANSHIP ........................................................................................................ 5149

Architectural Specification - Souk - Wall and H11/3 Foster and Partners

H11.3102 Blinds Generally...................................................................................................................................................................... 5150

H11.3200 TOLERANCES ............................................................................................................ 5251

Architectural Specification - Souk - Wall and H11/4 Foster and Partners

H11 ROOF AND WALL SYSTEMS

H11.1000 SCOPE, SUBMITTALS, TESTING AND PERFORMANCE

H11.1100 SPECIFICATION AND SCOPE

H11.1200 SYSTEM DESCRIPTIONS/TYPES

H11.1201 Type EWS-01 Cladding System

Architectural Specification - Souk - Wall and H11/5 Foster and Partners

H11.1202 Type EWS-02 Cladding System

Architectural Specification - Souk - Wall and H11/6 Foster and Partners

H11.1203 Type EWS-03 Cladding System

H11.1204 Type EWS-04 Cladding System

H11.1206 Type EWS-06 Cladding System

H11.1207 Type EWS-07 Walling System

H11.1208 Type EWS-08 Cladding System

H11.1209 Type EWS-18 Temporary Cladding system.

suitable corrosion protected.

H11.1240 Type RFL-01 Roofglazing System

H11.1241 Type RFL-02 Roofglazing System

H11.1242 Type RFL-03A Roofglazing System

H11.12443 Type RFL-04 Roofglazing System

Architectural Specification - Souk - Wall and H11/9 Foster and Partners

H11.1261 Type IWS-01 Internal Walling System

H11.1263 Type IWS-03 Internal Walling System

Architectural Specification - Souk - Wall and H11/10 Foster and Partners

H11.1264 Type IWS-04 Internal Walling System

H11.1265 Type IWS-05 Internal Walling System

H11.1271 Type SHD-01 Shading Device

H11.1273 Type SHD-03 Shading Device

H11.1274 Type SHD-04 Shading Device

Architectural Specification - Souk - Wall and H11/11 Foster and Partners

H11.1281 Type EDR-01 Bronze Doors

H11.1282 Type EDR-02 Bronze Doors

H11.1284 Type EDR-04 Aluminium Doors

H11.1300 SUBMITTALS AND TESTING

H11.1301 Tender Response

H11.1302 Pre-contract Samples

Architectural Specification - Souk - Wall and H11/12 Foster and Partners

H11.1303 Post Contract Samples

Architectural Specification - Souk - Wall and H11/13 Foster and Partners