HCF PDF

Uniclass
L7315
CI/SfB (52.3) X
August 2007
LEADING THE PRECAST INDUSTRY SINCE 1919
PRECAST
CONCRETE FLOORING
This Bison precast concrete flooring document is a comprehensive product and
technical guide designed for Structural Engineers, Civil Engineers, Specifiers
and Contractors.
It provides a range of products and solutions to choose from and is supported by

technical details, specifications and design guidelines/considerations for Part A,
Part E and Part L.
For EXTENSIVE TECHNICAL DETAILS PLEASE VISIT our website: www.bison.co.uk

CONTENTS
INTRODUCTION
PAGES 0 - 7
COMMERCIAL/INDUSTRIAL PRODUCTS 01
PAGES 08 - 23
HOUSING PRODUCTS SINGLE OCCUPANCY 02

PAGES 24 - 29
HOUSING PRODUCTS MULTIPLE OCCUPANCY 03

PAGES 30 - 39
COMPOSITE STEEL BEAM DESIGN 04

PAGES 40 - 41
BUILDING REGULATIONS 05
PAGES 42 - 57
SPECIFICATIONS & HEALTH AND SAFETY 06

PAGES 58 - 61
RELATED PRODUCTS
PAGES 62 - 63 07
BISON ONLINE
PAGES 64 08
3
For further HELP AND INFORMATION PLEASE CALL OUR TECHNICAL HELP LINE: 01283 495334
BISON
LEADING THE PRECAST INDUSTRY SINCE 1919
Excellent customer service, investment in research and development and an

unrivalled understanding of market needs are just some of the reasons we
have been ahead of the field for so long.
RESOURCE and Capacity Innovation

The largest production capacity across four manufacturing Over the last seven years, Bison has invested 50 million
plants throughout the UK, with Certificates of Assessed to ensure that our customers continue to benefit from
Capability, awarded by the British Standards Institution. innovative approaches to production, installation and service.
We can boast a number of unique developments such as
mechanically inserted Lifting Hooks and the Trailasafe fall
arrest system.

Sustainability DESIGN SUPPORT
With Bison products, you can be certain that all materials Bisons in-house
have been produced in conditions designed to have as little team represents
impact on the environment as possible. Swadlincote is the the very best
most environmentally friendly factory of its kind in in the industry
the world. and is on hand
to give design
Customer Driven advice for any
Our investment is focused on meeting and exceeding project, large
customer expectations. Bison customers in all the sectors or small. They can help identify the optimal solution for
we serve know that they can rely on us for outstanding your project, whether this means using one of our many
technical support, reliability and the highest quality product. precision-made steel moulds, or taking the bespoke
approach with a custom-made casting.
Customer SERVICE
The Bison service team provide comprehensive support, Designs are produced in our centralised production
from estimating to production and a contract team who planning department and downloaded to the factory
install the products on site. Wherever you are in the UK, machines by wireless link.
Bisons nationwide coverage ensures that support is
never far away. The Bison Precast Floor Designer software can assist with
the design of many Bison products including Hollow Core
slab units, Composite Hollowcore slab units and Solid
Composite slab units.
BISON CONCRETE FLOOR TYPES
Bison Concrete Floors are prestressed precast

concrete slabs used in all building types
Bison Concrete Floors are manufactured using a long line casting technique
with automatic casting equipment which places high strength, low water/
cement ratio concrete under a high degree of vibration and compaction.
BISON HOLLOW CORE BISON HOLLOW

& SOLID FLOORS COMPOSITE FLOORS
Widely used in masonry, steel and concrete structures for A combination of the Bison Hollow Core Slab with a structural
domestic, commercial and industrial buildings. The most concrete topping. This type of floor gives the benefit of an
economic flooring solution for the widest variety of situations, increased structural performance with an enhanced lateral
providing the maximum benefits of speed of construction. load distribution where necessary for heavy point loads.
The floor may be designed in the unpropped or partially
propped condition to suit particular requirements.

BISON CONCRETE FLOOR TYPES
BISON SOLID THE BISON

COMPOSITE FLOORS SOUND SLAB
Combines the advantages of a precast, prestressed The Bison Sound Slab has been specially developed to
element acting compositely with an in-situ concrete provide an economic and structurally efficient means of
structural topping to form a solid slab. The prestressed satisfying the requirements of Part E Sound Regulations.
element, whilst eliminating the need for conventional
shuttering, provides a structural performance far superior Floor Heating and

to normally reinforced concrete. Cooling Systems
As the conservation of energy continues to be a major
LIFTING HOOKS issue surrounding the environment, Bison has entered into
All Bison Precast Concrete Floors are available with a strategic partnership with velta UK. With over 35 years
inserted lifting hooks. For more information see section experience, velta have been responsible for some of the
Related Products, pages 62 & 63. industrys most important innovations in floor heating
and cooling systems and now offers the widest range of
INSULATED HOLLOW CORE solutions specifically designed to meet the requirements of

GROUND FLOORS each individual project. Bison and velta have joined forces
The system consists of expanded polystyrene (EPS) bonded to provide an innovative, sustainable and cost effective floor
to the soffit of Hollow Core units and formed to provide heating and cooling system which is precast in to Bison
special end and side bearing support where required. flooring products providing off site manufacturing benefits.
7 7
MARKET APPLICATIONS
COMMERCIAL/
INDUSTRIAL
Bison has a prolonged proven track record

within commercial / industrial markets and
produces a range of products and solutions
for many different floor applications.
This encompasses shops, shopping precincts, multi-storey car parks, office
developments, factories and warehouses.
However, the types of constructional components used in these buildings are

also often specified for large public developments such as schools
and hospitals.

MARKET APPLICATIONS
HOUSING
HOUSING HOUSING
SINGLE OCCUPANCY MULTIPLE OCCUPANCY
In traditional single-occupancy housing, individual Bison Similarly for multiple-occupancy housing, individual
products can solve particular problems for the designer, arising Bison products can solve particular problems.
from site conditions, constructional constraints or the Building

Bison has a sustained track record and reputation within
Regulations, including Part E, Part A and Part L.
the multiple occupancy market. A range of floor solutions
and products provide the architect and the structural
engineer with flexibility in design as well as satisfying the
Building Regulations, particularly with reference to sound
attenuations (Part E), Thermal Performance (Part L) and
Structural Robustness (Part A).
COMMERCIAL / INDUSTRIAL PRODUCTS
HOLLOW CORE FLOORS

THE BENEFITS
DESIGN
Structural Efficiency Extra Long Spans
A Hollow Core slab offers the ideal structural section by Factory made prestressed units offer the design benefit of
reducing deadweight while providing the maximum structural long span units for given depths. This avoids the need for
efficiency within the slab depth. intermediate supports and provides an economically light
solution throughout the entire structure. The Bison long span
Flexibility of Design Approach 450mm-deep unit can span in excess of 16 metres.
Precast floors are available with a variety of factory-formed
notches, slots and reinforcement arrangements which offer
various design approaches.
MANUFACTURING
Factory produced to Rigorous Quality Standards Shelf Angle Bearing
Because precast floors are factory produced, they are Slab ends can be notched during manufacture to facilitate a
manufactured in an environment which is more readily bearing within the depth of a main steel support.
controlled than a building site. Quality control systems are This minimises storey height, causing substantial cost
properly implemented and are independently examined on a benefits from reduced cladding, lower internal fittings and
regular basis under the British Standards Institution Quality other related peripherals.
Assurance Scheme, BS EN ISO 9001 approved.
Diaphragm Action
Fire Resistance Precast floor slabs are structurally grouted to provide a
Standard precast floors can be supplied with a fire resistance floor with full diaphragm action, as required in most
of up to two hours. Periods in excess of this can be provided multistorey frameworks.
with modified sections if required.
Preformed Site Services
Finished Soffits Precast floors can be provided with factory formed service
Precast floors are manufactured on high quality steel beds holes, thus avoiding laborious setting out and shuttering
and, in appropriate cases, are suitable for direct decoration. on site.
Exposed soffits can easily be accommodated.
CONSTRUCTION
Minimum In-situ Concrete Immediate Unpropped Working Platform
With a precast floor, a lot of the work is done off site. This Once a precast floor is erected, it is immediately available
eliminates what can be complex, time-consuming and as a working platform. In comparison, steel deck systems
weather-affected site work. can present problems in achieving level surfaces while
concrete is being poured, and in enabling access while in
Speed of Erection the propped condition.
Time-consuming activities such as propping, shuttering
and concrete-pouring are virtually eliminated.
10

SECTION 01
HOLLOW CORE FLOORS
CASE STUDIES
COMMERCIAL BUILDINGS
AND CAR PARKS
The office block shown is the British Gas offices in
Solihull, West Midlands. This is a typical commercial
application where the structural form consists of a
steel frame with 7.5 x 8.7m bays and 200mm precast
Hollow Core units spanning 7.5m. A total of 9100m2
of precast units were used and 40m3 of precast stair.
Multi storey car park in Nuneaton where 10,000m2 of

150mm deep Hollow Core floor units and 67m3 of precast
stair units was used to provide excellent durability and
performance in a busy, robust car park environment.
RETAIL DEVELOPMENTS
The IKEA outlet in Manchester is constructed using
a steel frame with precast unit floors. Over 40,000m2
of 200mm deep Hollow Core precast floor units were
used in the construction. The grid reflected the use
of car park, retail and offices on different floors.
Drake Circus Shopping Centre located in Plymouth

used 19,000m 2 across a combination of Hollow Core
floor profiles from 200mm up to 450mm deep.
HOSPITAL & STADIA

DEVELOPMENTS
Pictured is a hospital in Exeter constructed using
a steel frame structure with 200mm and 300mm
deep Hollow Core units used to span up to 9m. This
provided flexibility in span lengths and optimised
design for the applied loads over 4,250m 2 floor area
throughout.
Millennium Stadium in Cardiff used over 48,000m2 of

precast Hollow Core floor units and over 380 precast
stair units.
11
HOLLOW CORE FLOORS

UNIT PROFILES
150mm Sound Slab unit profile
75mm unit profile
100mm unit profile
150mm unit profile
200mm unit profile
250mm unit profile
260mm unit profile
300mm unit profile
350mm unit profile
400mm unit profile
450mm unit profile
1200mm Nominal Width

12

SECTION 01
HOLLOW CORE FLOORS
LOAD/SPAN TABLE
Largely because of fast on-site construction, Bison Hollow Core Floors are one of the most economic flooring solutions
for the widest variety of situations including masonry, steel and concrete structures for retail, commercial and
industrial buildings.
Spans indicated below allow for characteristic service load (live load)
plus self weight plus 1.5 kN/m2 for finishes
Overall
structural Characteristic service loads kN/m2
depth mm
0.75 1.5 2.0 2.5 3.0 4.0 5.0 7.5 10..0 15.0
Effective span in metres
100* 5 5 5 5 4.8 4.5 4.2 3.7 3.3 2.8
150* 7.5 7.5 7.5 7.5 7.3 6.8 6.4 5.6 5 3.2
200 10 10 9.7 9.4 9.1 8.5 8 7.1 6.4 5.5
250 12.3 11.5 11.1 10.7 10.4 9.7 9.2 8.1 7.4 6.3
300 15 14.9 14.4 13.9 13.5 12.8 12.1 10.9 10 8.7
350 17.4 16.5 15.9 15.5 15 14.2 13.6 12.5 11.2 9.8
400 18.5 17.6 17 16.6 16.1 15.3 14.6 13.2 12.1 10.6
450 19.9 19 18.5 18 17.5 16.7 15.9 14.5 13.4 11.7
The table is given as a guide only. When using maximum spans, consideration must be given to the effect of camber and
deflection on partitions or finishes. Further advice is available on request. * 35mm screed required for 2 hour
fire resistance.
13
HOLLOW CORE FLOORS

BEARING DETAILS
BEARING ON SHELF ANGLES
Finishes Structural concrete infill
Nominal bearing 75 Projection of angle

Minimum bearing 50 beyond extremity of
flange 50 mm.
Greater where U.C.
sections are used.
Refer to Bison for
assistance.
25 mm
clearance
25 mm clearance is required to allow unit to be dropped

into position past the flange of the supporting U.B.
14

SECTION 01
HOLLOW CORE FLOORS
BEARING DETAILS
BEARING ON MASONRY
Finishes
Nominal bearing
t / 2 - 10 mm
Wall thickness
t
t 190
SIDE BEARING
Where required by Building Regulations for

sound insulation.
Finishes
Continuous wet mortar by

builder to take up camber
15
HOLLOW CORE FLOORS

BEARING DETAILS
NARROW WALL BEARING
Structural concrete infill
Nominal bearing Tie reinforcement at

t / 2 - 10 mm 400 c/c in joints and
(Min. 65 mm)
troughs provided in
Wall thickness 1200 wide units
t < 190 t
(Min. 140 mm)
(NB. In order to satisfy the tolerances in this situation, this

detail is only recommended where a full bearing is available
at the other end of the slab)
NARROW BEARING ON STEELWORK
Structural concrete infill

troughs provided in
1200 wide units
Wall thickness
t 150
t
(Min. 140 mm)
16

SECTION 01
HOLLOW CORE FLOORS
BEARING DETAILS
END SLOTS IN UNITS

Slots may be provided in slab ends for the purpose of tying into
the structure for nominal continuity.
TRIMMING OPENINGS
M.S.Trimmer. Fire protection, where necessary by

General Contractor.
Finishes
The recommendations for bearings of precast units are set out in Clause 5.2.3 of B.S. 8110:1997. These vary according to the type of floor
construction and the type of support material and building tolerances. In general nominal bearings of 100 mm on masonry or 75 mm on
steelwork are recommended but may be reduced dependent upon circumstances and subject to the above clause.
17
HOLLOW COMPOSITE FLOORS

UNIT PROFILES
200 to 225mm overall composite depth
comprising 150mm unit with 50 or 75mm structural topping
335mm overall composite depth
comprising 260mm unit with 75mm structural topping
comprising 450mm unit with 75mm composite material
18 1200mm Nominal Width

SECTION 01
HOLLOW COMPOSITE FLOORS
LOAD/SPAN TABLE
A Bison Hollow Composite Floor is a Bison Hollow Core Slab with a structural concrete topping. This combination delivers
increased structural performance overall, with an improved lateral load distribution where necessary for heavy point loads.
The floor may be designed in the unpropped or partially propped condition to suit particular requirements. It is particularly
suitable for industrial buildings, high buildings, car parks or other structures where additional longitudinal and transverse
tying is required.
plus self weight plus 1.5 kN/m2 for finishes
Overall
structural Characteristic service loads kN/m2
depth mm
0.75 1.5 2.0 2.5 3.0 4.0 5.0 10..0 15.0
200 8.25 8.25 8.1 7.9 7.7 7.4 7.1 5.8 4.9
250 10.4 9.9 9.7 9.4 9.2 8.8 8.4 7 6
300 11.7 11.2 10.9 10.6 10.4 9.9 9.5 7.8 6.8
375 14.5 14 13.7 13.5 13.2 12.7 12.3 10.7 8.8
425 16 15.5 15.2 14.9 14.6 14.1 13.7 11.9 10
475 17.1 16.5 16.2 15.9 15.6 15.1 14.6 12.7 10.7
525 18.5 17.9 17.6 17.3 17 16.4 15.9 13.9 11.7
The above data is based upon 50 or 75mm structural topping of C30 concrete which should be regarded as a minimum.
Other topping depths may be recommended in some circumstances. Design data for alternative combinations are available
from Bison design offices. In relation to the overall structural concept of the building it is also important also to consider
topping reinforcement, daywork and movement joints.
19
SOLID COMPOSITE FLOORS

UNIT PROFILES
Bison Solid Composite Floors consist of a precast, prestressed element acting compositely with an in-situ concrete
structural topping to form a solid slab. This combination of elements delivers the benefits of both, such as a structural
performance far superior to normally-reinforced concrete, reduced construction depths, no shuttering, minimal propping,
built-in fire resistance, fast erection, and increased flexibility of architectural and engineering design, such as the scope to
incorporate all the details normally associated with in-situ design, such as the tying in of balconies, trimming of openings,
maximum load distribution and minimum structural depth.
75mm unit with 50mm structural topping
20

SECTION 01
LOAD/SPAN TABLE
A Bison Hollow Composite Floor is a Bison Hollow Core Slab with a structural concrete topping. This combination delivers
increased structural performance overall, with an improved lateral load distribution where necessary for heavy point loads.
The floor may be designed in the unpropped or partially propped condition to suit particular requirements. It is particularly
suitable for industrial buildings, high buildings, car parks or other structures where additional longitudinal and transverse
tying is required.
Fire Resistance*
plus self weight plus 1.5 kN / m2 for finishes

Overall Propped
Unit Self Wt Characteristic service loads kN / m2
structural or
depth kN / m2
depth mm Unpropped
0.75 1.5 2.0 2.5 3.0 4.0 5.0 10.0 15.0
125 2.95 6.70 6.25 6.00 5.70 5.50 5.15 4.87 3.90 3.80
150 3.54 7.50 7.00 6.80 6.50 6.35 5.95 5.60 4.56 3.92
1 hour
75 P
175 4.12 8.32 7.78 7.52 7.25 7.02 6.62 6.29 5.12 4.05
200 4.71 8.90 8.40 8.12 7.85 7.62 7.20 6.85 4.98 3.96
125 2.95 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.60 3.10
150 3.54 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.50
1 hour
75 U/P
175 4.12 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.65
200 4.71 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.68
150 3.54 7.80 7.27 7.00 6.75 6.50 6.10 6.77 4.55 3.85
200 4.71 9.10 8.64 8.22 8.08 7.82 7.33 7.05 5.80 4.50
1 hour
100 P
250 5.89 10.18 9.85 9.15 9.00 8.90 8.45 8.08 6.12 4.50
300 7.07 10.66 9.58 9.45 9.15 8.80 8.15 7.60 5.80 4.40
150 3.54 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.50 3.88
200 4.71 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.96 4.50
1 hour
100 U/P
250 5.89 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.80 4.50
300 7.07 4.95 4.92 4.90 4.88 4.85 4.80 4.71 4.60 4.40
150 3.54 7.26 6.80 6.66 6.46 6.23 5.85 5.50 4.30 3.60
200 4.71 8.57 8.25 8.05 7.83 7.10 6.85 6.60 5.62 4.25
2 hour
100 P
250 5.89 9.00 8.80 8.65 8.50 8.35 8.10 7.80 5.75 4.35
300 7.07 10.20 9.00 8.90 8.70 8.30 7.30 7.20 5.50 4.20
150 3.54 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.30 3.62
200 4.71 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.60 4.20
2 hour
100 U/P
250 5.89 5.00 5.00 5.00 4.95 4.90 4.85 4.80 4.55 4.35
300 7.07 4.65 4.65 4.65 4.65 4.60 4.55 4.55 4.40 4.02
*Enhancement of the stated fire period may be achieved by applied soffit finishes.
21

BEARING DETAILS
SIMPLE BEARINGS ON TOP FLANGE OF STEELWORK
Nominal support reinforcement and/or daywork joints

determined by general layout and site operation.
40 mm
Min. bearing
40 mm
Min. bearing
SLAB COMPOSITE WITH SUPPORTING BEAM
Flange reinforcement and shear studs as

required by steelwork design
40 mm
Min. bearing
BEARINGS ON SHELF ANGLES
Minimum 25 mm cover to top of steel beam flange
Minimum 50 mm clearance Nominal 50 mm bearing
22

SECTION 01
BEARING DETAILS
CANTILEVER CONSTRUCTION
In-situ structural topping on precast element
Precast balcony
element
For IsoPro balcony requirements refer to Bison for assistance.
IN-SITU CONSTRUCTION CENTRED
Solid composite floors may be placed on in-situ beam

downstands or supported on shutters before pouring
site concrete
Nominal 50 mm bearing for

precast elements
IN-SITU CONSTRUCTION SIDE
Beam depths and widths to suit specific requirements
Nominal 50 mm bearing for

precast elements
23
HOUSING PRODUCTS SINGLE OCCUPANCY
HOLLOW CORE FLOORS

THE BENEFITS
USER BENEFITS
Sound Resistance Fire
The single most common complaint in relation to housing Adequate fire resistance is an important design feature of any
is noise nuisance. Timber floors have little sound resistance modern building. It has long been recognised that floors between
and most people will be familiar with the problems and the flats in multi-occupancy housing should have a high level of fire
inconvenience of sound transmission, particularly from upstairs resistance. Consequently, these are almost always constructed
to downstairs. Precast concrete floors provide an extremely in concrete in order to satisfy the Building Regulations. It seems
efficient sound barrier between separate living areas. reasonable that a similar level of protection should be afforded to
those living in houses. Concrete is, of course, a non-combustible
Maintenance material and it also acts as a solid barrier which will contain not
Precast concrete is an inert material. It does not shrink only the fire but the smoke, which is the primary cause of most
and warp like timber and does not produce the cracking of fatalities in fire accidents.
plasterwork and other finishes which result in an ongoing
and costly maintenance problem. Concrete is not subject to Factory Produced to Rigorous Quality Standards
damage from rot or insect attack. Because precast floors are factory produced, they are
manufactured in an environment which is more readily
Squeaky Floors controlled than a building site. Quality control systems in
Another problem associated with the shrinkage of timber Bison factories are properly implemented and are independently
materials is the squeaking between boards and joists when examined on a regular basis under The British Standards
walked upon. This is extremely irritating and very expensive to Institution Quality Management System defined in BS EN ISO 9001.
rectify. This problem does not exist with a concrete floor.
CONSTRUCTION BENEFITS
Design flexibility Structural Efficiency
Unlike timber, a precast concrete floor provides a structural A Hollow Core slab offers the ideal structural section by
platform which gives the house designer greater freedom in reducing the deadweight whilst providing the maximum
supporting upper floor wall partitions to virtually any layout. structural efficiency with the minimum slab depth. This offers
Furthermore with a concrete upper floor the partitions can be the design benefit of longer spans, thus reducing the lengths
built in blockwork with its greater sound resistance, instead of of internal loadbearing walls and foundations.
timber stud.
Site Safety
Speed of Erection Once a precast concrete floor is erected it is immediately
Typically a single precast floor slab is up to 10 square metres available as a working platform. Combined with Trailasafe
in area and can be laid in minutes. Dependent upon site synthetic mesh for trailer deck fall arrest, and the Bison Air
conditions and house sizes, the floors to several houses can Mat for roll-off fall protection, this creates the safest possible
normally be completed in one day. environment for site workers.
Preformed Service Provision

Precast concrete floors can be provided with factory-formed
service holes to accommodate all the necessary service
routes with ease.
24

HOUSING PRODUCTS SINGLE OCCUPANCY SECTION 02
HOLLOW CORE FLOORS
CASE STUDIES
TERRACED SINGLE OCCUPANCY

HOUSING DEVELOPMENTS
Pictured is part of a large housing development based in
London. Over 578m2 of 150mm Hollow Core floor units were
used throughout for 1st and 2nd floor applications across
varying design type houses, typically from town type, 2 floor
houses, to traditional 1st floor houses.
Hollow Core floors have been installed by many

housebuilders, both large and small, for terraced
developments.
DETACHED HOUSING
DEVELOPMENTS
Pictured is a detached housing development based in
Warwick. The development was a mix of three, four and
five bedroom detached houses, where 250m 2 of 150mm
Hollow Core units were used throughout the plot for all
first floor applications.
Further detached developments using Hollow Core floors

have been constructed across the country, from Sterling in
Scotland to Portsmouth in England.
LARGE ESTATE HOUSING

DEVELOPMENTS
Pictured is an estate type housing, consisting of 8 bedrooms,
24 rooms and 3 outbuildings based in Oxshott.
496m2 of Hollow Core floor units were used throughout

the house.
25
HOLLOW CORE FLOORS

GROUND/UPPER FLOOR SLAB PROFILES
The most suitable and widely used precast unit for single occupancy housing is a 1200mm wide Hollow Core slab with a
depth of either 150 or 200mm.
150mm unit profile
200mm unit profile
CONSTRUCTION DETAILS
TYPICAL HOUSE LAYOUTS
1200 mm Wide Units
Structural steel supports Slab span direction Load bearing walls Non-Load bearing walls
by others
26

SECTION 02
HOLLOW CORE FLOORS
alternative batten arrangements to soffits
Battens Plasterboard
Short firing is not recommended. Various site-drilled anchors are available and, used in accordance
with the manufacturers instructions, are a simple and economic fixing method.
Service routes in ceiling void Battens and counterbattens Plasterboard
To view load span tables please go to page 13
A SUSTAINABLE CHOICE...
The use of Bison Hollow Core flooring can significantly cut the carbon dioxide emissions of a project by up to one
fifth; a CO2 reduction and material saving of 23% can be achieved in the construction of an office block.*
*based on a 2600m2 office block development
27
HOLLOW CORE FLOORS

BEARING DETAILS
TYPICAL DUAL BEARING
Alternative Alternative
services route services route
190 mm
Block Wall
SIDE BEARING

sound insulation.
Finishes

TYPICAL SINGLE BEARING TRIMMING OPENINGS

M.S.Trimmer. Fire protection, where necessary
by General Contractor.
100 mm
Block Wall 190 mm
Block Wall
28

SECTION 02
INSULATED HOLLOW CORE FLOORS
GROUND FLOOR
150 mm unit profile
200 mm unit profile
1200 mm Nominal Width
INSULATED HOLLOW CORE UNIT DETAILS

Finishes
150 mm
or 200 mm
Hollow Core Unit Expanded Polystyrene

Support Castellations
(EPS) bonded to soffit
INSULATED HOLLOW CORE FLOORS

BEARING DETAILS
DUAL BEARING EXTERNAL WALL BEARING
Finishes Support Castellations
Finishes
190 mm
262 mm Sleeper Wall
or 312 mm Expanded Polystyrene
(EPS) bonded to soffit
Foundation
The Building Regulations Part L1A, L2A 2006 Conservation of fuel and power require that a building is airtight and
pressure testing for this is covered by regulation 54. The regulations no longer allow the elemental method and a building
needs to be considered as a whole to satisfy the requirements of the regulations. Bison can provide an insulated slab to
give a thermal U value of 0.22W/m2 for the floor and greater if required. 29
HOUSING PRODUCTS MULTIPLE OCCUPANCY
HOLLOW CORE FLOORS

THE BENEFITS
Speed of Erection Composite Steel Beam Design
Time consuming activities such as propping, shuttering and Composite Steel Beam Design incorporating either Hollow
concrete pouring are virtually eliminated. Core or solid slabs provides a structural and cost efficient
solution for steel frames. It reduces total tonnage of steel
Lifting Hooks beams by up to 40% and also reduces the number of
Bison can supply Hollow Core units with cast-in lifting hooks components to be erected.
that speed up the installation and bring associated Health &
Safety benefits. Sound Requirements Building
Regulations Part E
Immediate Unpropped Working Platform In new-build attached dwellings a developer may choose
Propping is generally not required with Hollow Core floors. between Pre-Completion Testing (PCT.) or, if available, a
Once a precast floor is erected it is immediately available Robust Detail (RD). Bison Concrete Products have developed
as a working platform. In comparison, steel deck systems a series of solutions to cover the use of precast concrete
can present problems in achieving level surfaces while units in association with masonry buildings and steel and
concrete is poured, and in enabling access while in the concrete frames. Solutions have been developed and testing
propped condition. is in the process of being completed prior to an application
for Robust Detail status.
Minimum In-situ Concrete
With a precast floor a lot of the work is done off-site. This Preformed Site Services
eliminates on-site work that can be complex, time-consuming Precast floors can be provided with factory formed service
and weather affected. holes, thus avoiding laborious setting out and shuttering
on-site.
Extra Long Spans
Factory-made prestressed units offer the design advantage Structural Efficiency
of long span units for given depths. This can avoid the need A Hollow Core slab offers the ideal structural section by
for intermediate supports. reducing the deadweight whilst providing the maximum
structural efficiency within the slab depth.
Diaphragm Action
Precast floor slabs, when structurally grouted, provide a Factory-Produced to Rigorous
floor with full diaphragm action to the building. A structural Quality Standards
concrete topping is not required. Because precast floors are factory-produced, they are
manufactured in an environment which is more controlled
Flexibility of Design Approach than a building site. Quality control systems are properly
Precast floors can provide the technical solution for the implemented and are independently examined on a regular
requirements of Part A of the Building Regulations 2004 for basis, under the British Standards Institution Quality
Disproportionate Collapse. Management Scheme defined in BS EN ISO 9001:2000.
30

SECTION 03
HOLLOW CORE FLOORS
TRACK RECORD
MULTI-STOREY HOUSING
The three block housing development in Windsor consisted
of 1st, 2nd, 3rd and roof with the other two blocks being 1st,
2nd and roof. All three blocks used 200mm deep Hollow Core
sound slab flooring with 3897m2 used throughout the scheme
and 30m3 of concrete precast stairs.
MULTI-STOREY HOUSING
The housing development in Worcester, which used 1,700m 2
of 200mm deep Hollow Core sound slab flooring and 10m3
of precast concrete stairs. This included one three storey
block and one 4 storey block.
MULTI-STOREY RESIDENTIAL
DEVELOPMENTS
This multi-storey residential development used precast
Hollow Core floors within a steel frame structure. The
development is in Walsall, Birmingham, and used 1500m 2 of
200mm deep Hollow Core sound slab flooring, plus 29m3 of
precast stair units.
A flat, uninterrupted soffit was achieved with the Hollow Core

units, spanning 6.1m between downstand beams, which were
at separating wall positions.
31
HOLLOW CORE FLOORS

UNIT PROFILES
150mm Sound Slab unit profile
150mm unit profile
200mm unit profile
250mm unit profile
260mm unit profile
300mm unit profile
To view load span tables please

go to page 13
32

SECTION 03
HOLLOW CORE COMPOSITE FLOORS
UNIT PROFILES
A SUSTAINABLE PROCESS...
Bison precast floors are produced under sustainable

conditions at our flagship production plant at
Swadlincote, Derbyshire. The state of the art Hollow
Core plant is the most technically advanced and
sustainable of its kind in the world: all waste water from
the factory is recycled; the fully automated process
is energy efficient, taking only 12 hours; and the
manufacturing process maximizes efficiency, which go to page 13
prevents material wastage.
33
HOLLOW CORE FLOORS

BEARING DETAILS
The recommendations for bearings of precast units are set out in Clause 5.2.3 of B.S. 8110:1997. These vary according to the type
of floor construction and the type of support material and building tolerances. In general, nominal bearings of 100mm on masonry
or 75mm on steelwork are recommended but may be reduced dependent upon circumstances and subject to the above clause.
BEARINGS ON SHELF ANGLES
Nominal bearing 75 Projection of angle

Minimum bearing 50 beyond extremity of
flange 50 mm.
Greater where U.C.
sections are used
25 mm
clearance
25 mm clearance is required to allow unit to be dropped

into position past the flange of the supporting U.B.
34

SECTION 03
HOLLOW CORE FLOORS
BEARING DETAILS
BEARINGS ON MASONRY
Finishes
Nominal bearing
t / 2 - 10 mm
t
Wall thickness
t 190
SIDE BEARING

sound insulation.
Finishes

35
HOLLOW CORE FLOORS

BEARING DETAILS
NARROW WALL BEARING

(Min. 65 mm)
troughs provided in
Wall thickness 1200 wide units
t < 190 t
(Min. 140 mm)
N.B. In order to satisfy the tolerances in this situation, this

detail is only recommended where a full bearing is available
at the other end of the slab.
NARROW BEARING ON STEELWORK

troughs provided in
1200 wide units
Wall thickness
t 150
t
(Min. 140 mm)
36

SECTION 03
HOLLOW CORE FLOORS
BEARING DETAILS
END SLOTS IN UNITS

Slots may be provided in slab ends for the purpose of tying into the
structure for nominal continuity or disproportionate collapse
TRIMMING OPENINGS
M.S.Trimmer. Fire protection, where necessary by
General Contractor.
Finishes
37

UNIT PROFILES
Solid composite construction utilises the advantages of a prestressed precast element acting compositely with an in-situ structural
topping, combining the benefits of precast and in-situ construction.
These benefits are:

Reduced Construction Depths
Speed of Erection
Elimination of Shuttering
Minimal Propping
Fire Resistance
Flexibility of Architectural
and Engineering design
75mm unit with 50, 75, 100 or 125mm composite material
100mm unit with 50, 100, 150 or 200mm composite material

go to page 21
A SUSTAINABLE FUTURE...
The inherent thermal mass properties of concrete can help to regulate temperature fluctuations, ensuring that
indoor environments are comfortable without the use of air conditioning, providing the user with a significant cost
and energy saving. Compared to air conditioning, the active Fabric Energy Storage (FES) of concrete reduces
carbon dioxide emissions by up to 50%.
38

SECTION 03
BEARING DETAILS
SIMPLE BEARING ON TOP FLANGE OF STEELWORK
Nominal support reinforcement and/or daywork joints

determined by general layout and site operation.
40 mm
Min. bearing
40 mm
Min. bearing
SLAB COMPOSITE WITH SUPPORTING BEAM
Flange reinforcement and shear studs as

required by steelwork design
40 mm
Min. bearing
39
COMPOSITE STEEL BEAM DESIGN
Composite steel beam design incorporating Hollow Core or solid slabs provides a structural and cost efficient solution for steel
frames. It reduces total tonnage of steel beams by up to 40% and also reduces the number of components to be erected.
Definition
Composite steel beam design is the use of Hollow Core or solid slabs together with in-situ infill in conjunction with welded studs
onto steel beams. This enables the slabs and beams to act compositely together, enhancing the load capacity of the steel beams.
DESIGN CONSIDERATIONS
1. SHEAR STUD CAPACITY

PRD = 0.8 f u (d2/4) / gv
or
PRD = 0.29 ad2 fcpEcp / gv
Whichever is the lesser.

-0.33
fy 300 40
*1000+2.5g
16 460 s fcu
a = 0.2 ( h/d+1) h = height of the stud.
d = is the diameter of the shank of the stud.
fu = is the specified ultimate tensile strength of the material of the stud but not greater than 500 N/mm2.
= a factor which takes into account the gap width g (mm) and is given as 0.5 (g/70+1) 1.0 and g 30mm.
= a factor which takes into account the diameter of transverse high tensile tie steel (grade 460) and
is given by 0.5 ( / 20+1) 1.0 and 8mm.
= transverse joint factor = 0.5 (w / 600+1), w = width of hollow core unit.
fcp = average concrete cylinder strength = 0.8 x average cube strength of the in-situ and precast concrete.
Ecp = average value of elastic modulus of the insitu and precast concrete.
gv = partial safety factor for shear stud.
2. EFFECTIVE WIDTH OF COMPRESSION AREA

-0.33
fy 300 40
Beff = *1000+2.5g
16 460 s fcu
= transverse reinforcement diameter
fcu = concrete strength
s = bar spacing
fy = reinforcement strength
g = gap
40

SECTION 04
DESIGN CONSIDERATIONS
Beff
Insitu Concrete Shear Stud Hollow Core Slab
D
slab
P. N. A.
D
Transverse
Reinforcement
Steel Beam
Rc = 0.45 x f cu;
beff x D slab
P. N. A.
Py
Py
41
BUILDING REGULATIONS
PART A MASONRY BUILDINGS

CONSTRUCTION SOLUTIONS
The Building Regulations Part A December 2004 introduced a system of classification of buildings to reflect the risk of disproportionate
collapse probabilities. The following solutions give guidance as to the details required for each of the main frame options related to
Hollow Core slabs.
Class 1 and 2A Buildings
Flats, apartments and other residential buildings not exceeding 4 storeys. Provision of effective anchorage to satisfy Building
Regulations from building in of Hollow Core units.
Class 2B Buildings (Horizontal Ties only + notional removal)
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys. All design and details for
horizontal tying in accordance with BS5628 Part 1 and BS8110 Part 1.
DETAILS FOR TYPE 1 & 2A
EXTERNAL EXTERNAL
LOAD BEARING CAVITY WALL DETAIL NON-LOAD BEARING CAVITY WALL DETAIL
Bison precast Bison precast Bison precast Bison precast

concrete Hollow concrete Hollow concrete Hollow concrete Hollow
Core slab unit Core slab unit Core slab unit Core slab unit
Continuous wet Continuous wet
mortar, by builder, mortar, by builder,
Solid block wall Solid block wall to take up camber to take up camber
Solid block wall Solid block wall
100 mm min. 100 mm min. 100 mm min. 100 mm min.
Reinforcement to suit Reinforcement to suit

Structural Engineers Structural Engineers
design design Reinforcement to suit Reinforcement to suit
10 mm dia. high yield 10 mm dia. high yield In-situ In-situ design design
U bar per trough U bar per trough concrete stitch concrete stitch
In-situ In-situ
42
concrete stitch concrete stitch Bison precast Bison precast
concrete Hollow concrete Hollow
Core slab Core slab
For EXTENSIVE TECHNICAL DETAILS
Bison precast concrete PLEASE
Bison precast VISIT our website: www.bison.co.uk
concrete 150 mm wide perforated150 mm wide perforated
Hollow Core slab unit Hollow Core slab unit pocket along the edge pocket along the edge
with perforated troughs with perforated troughs of slab unit at 1200 mmof slab unit at 1200 mm
for tying requirements for tying requirements centreswith 10 mm dia. centreswith 10 mm dia.
to take up camber to take up camber
SECTION 05
PART A MASONRY BUILDINGS
Class 2B Buildings (Horizontal and Vertical Ties)
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys. All design and details
for horizontal and vertical tying in accordance with BS5628 Part 1and BS8110 Part 1 for Class 2B and Class 3 Buildings.
Class 3 Buildings (Horizontal and Vertical Ties + Risk Assessment)
All buildings defined above as Class 2A and 2B that exceed the limits on area and/or number of storeys.
on precast Bison precast Bison precast Bison precast
ncrete Hollow All concrete
designHollow
and details for horizontal and vertical tying in accordance concrete
with BS5628
Hollow Part 1and BS8110
concrete Hollow Part 1 for
re slab unit Core slab unit Core slab unit Core slab unit
Class 2B and Class 3 Buildings. Continuous wet Continuous wet
Solid block wall Solid block wall to take up camber to take up camber
Solid block wall Solid block wall
100 mm min. 100 mm min. 100 mm min. 100 mm min.
EXTERNAL EXTERNAL
LOAD BEARING CAVITY WALL DETAIL NON-LOAD BEARING CAVITY WALL DETAIL

design design Reinforcement to suit Reinforcement to suit
10 mm dia. high yield 10 mm dia. high yield In-situ In-situ design design
U bar per trough U bar per trough concrete stitch concrete stitch
situ In-situ
ncrete stitch concrete stitch Bison precast Bison precast
concrete Hollow concrete Hollow
Core slab Core slab
Bison precast concrete Bison precast concrete 150 mm wide perforated 150 mm wide perforated
Hollow Core slab unit Hollow Core slab unit pocket along the edge pocket along the edge
with perforated troughs with perforated troughs of slab unit at 1200 mm of slab unit at 1200 mm
for tying requirements for tying requirements centreswith 10 mm dia. centreswith 10 mm dia.
U bar per socket U bar per socket
140 mm 140 mm 140 mm 140 mm
43
PART A CONCRETE FRAMED BUILDINGS

Class 2B Buildings (Horizontal and Vertical Ties)
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys.
Class 3 Buildings + (Risk Assessment)
All buildings defined above as Class 2A and 2B that exceed the limits on area and/or number of storeys. All design and details for
horizontal and vertical tying in accordance with BS8810 Part 1 for Class 2B and Class 3 Buildings.
TYPICAL SECTION TYPICAL SECTION

INTERNAL WALL (LOAD BEARING) EXTERNAL WALL (LOAD BEARING)
Grout joint Grout joint Reinforcement to suitReinforcement to suit Grout joint Grout joint Reinforcement to suitReinforcement to suit
Structural Engineers Structural Engineers Structural Engineers Structural Engineers
In-situ In-situ In-situ In-situ
design design design design
concrete infill concrete infill concrete infill concrete infill
Wire loop Wire loop

connections connections
Bison precast concrete 10 mm dia.

Bison precast concrete 10 mm dia. 10 mm dia. 10 mm dia.
Hollow Core slab Hollow Core slab U bar in troughts U bar in troughts U bar in U bar in
troughts troughts
Bison precast concrete

Hollow Core slab Hollow Core slab
175 mm 175 mm 150 mm 150 mm
Grout joint Grout joint Reinforcement to suitReinforcement to suit Grout joint Grout joint Reinforcement to suitReinforcement to suit
Wire loop Wire loop


Bison precast concrete 150 mm wide perforated
150 mm wide perforated
Hollow Core slab Hollow Core slab pocket along the edge pocket along the edge
Bison precast concrete of slab unit at 1200 mm
of slab unit at 1200 mm
Hollow Core slab Hollow Core slab centre swith 10 mm dia.
centre swith 10 mm dia.
175 mm 175 mm 150 mm 150 mm
44

SECTION 05
Grout joint Grout joint Reinforcement to suit Reinforcement to suit Grout joint Grout joint Reinforcement to suit Reinforcement to suit
In-situ
concrete infill
PART A CONCRETE FRAMED BUILDINGS
In-situ
concrete infill
Structural Engineers
design
design In-situ
concrete infill
In-situ
concrete infill
design
design
Wire loop Wire loop
Bison precast concrete 10 mm dia.

Bison precast concrete 10 mm dia. 10 mm dia. 10 mm dia.
Hollow Core slab Hollow Core slab U bar in troughts U bar in troughts U bar in U bar in
troughts troughts
Bison precast concrete Bison precast concrete

Hollow Core slab Hollow Core slab
175 mm 175 mm 150 mm 150 mm
TYPICAL SECTION TYPICAL SECTION

INTERNAL WALL (NON-LOAD BEARING) EXTERNAL WALL (NON-LOAD BEARING)
Grout joint Grout joint Reinforcement to suit Reinforcement to suit Grout joint Grout joint Reinforcement to suit Reinforcement to suit
Wire loop Wire loop

Bison precast concrete Bison precast concrete 150 mm wide perforated 150 mm wide perforated
Hollow Core slab Hollow Core slab pocket along the edge pocket along the edge
Bison precast concrete Bison precast concrete
of slab unit at 1200 mm of slab unit at 1200 mm
Hollow Core slab Hollow Core slab centre swith 10 mm dia. centre swith 10 mm dia.
175 mm 175 mm 150 mm 150 mm
45
PART A STEEL FRAMED BUILDINGS

Class 1 and 2A Buildings
Apartments and other residential buildings not exceeding 4 storeys. This type of building uses the friction and built-in
details to achieve tying requirements.
TYPICAL SECTION EXTERNAL STEELWORK DETAILS
In-situ In-situ In-situ

Continuous wet mortar Continuou
concrete stitch concrete stitch concrete stitch
by Builder, to take up by Builder,
camber camber
Bison precast Bison precast Bison precast Bison precast Bison precast Bison precast Bison prec
concrete Hollow concrete Hollow concrete Hollow concrete Hollow concrete Hollow concrete Hollow concrete H
Core slab unit Core slab unit Core slab unit Core slab unit Core slab unit Core slab unit Core slab
In-situ concrete stitch In-situ concrete stitch
150 mm wide perforated 150 mm w

Reinforcement to suit Reinforcement to suit Reinforcement to suit pocket along the edge pocket alo
Structural Engineers Structural Engineers Structural Engineers of slab unit at 1200 mm of slab uni
design welded to top design welded to top design welded to top centreswith 10 mm dia. centreswith
In-situ concrete stitch In-situ concrete stitch flange of steel beam at flange of steel beam at flange of steel beam at U bar per socket U bar per
trough bottom trough bottom trough bottom
Shear stud Shear stud
Bison precast Bison precast

concrete Hollow concrete Hollow In-situ concrete stitch In-situ concrete stitch In-situ concrete stitch
Core slab unit Core slab unit
Bison precast concrete Bison precast concrete Bison precast concrete Bison precast Bison prec
46Structural Engineers Structural Engineers
Hollow Core slab units
with preformed troughs
Hollow Core slab units
with preformed troughs
Hollow Core slab units concrete Hollow
with preformed troughs Core slab unit
concrete H
Core slab
design design for tying requirements for tying requirements for tying requirements
Continuous wet Continuou
mortar, by Builder, mortar, by
For EXTENSIVE TECHNICAL DETAILS PLEASE VISIT our website: www.bison.co.uk to take up camber to take up
SECTION 05
PART A STEEL FRAMED BUILDINGS
CONSTRUCTION SOLUTIONS In-situ
In-situ
concrete stitch
In-situ
concrete stitch
Continuous wet mo
by Builder, to take
Continuous wet mortar
concrete stitch camber
by Builder, to take up
Class 2B Buildings (Horizontal and Vertical Ties) camber
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys.
Class 3 Buildings (Horizontal and Vertical Ties + Risk Assessment)

Bison precast All buildings defined Bison
above as Class 2A and 2B that exceed theBison
precast limits on area and/or number ofBison
precast storeys.
precast Bison precast
concrete Hollow concrete Hollow Bison precast concrete Hollow concrete Hollow Bison precast concrete Hollow
Core slab unit Core slab unit concrete Hollow Core slab unit Core slab unit concrete Hollow Core slab unit
These types of buildings require horizontal and vertical ties which are provided by the steel frame. Additionally the floors
must be tied to the steelwork at the perimeter and to each other for internal supports. Additional internal tying of the floor to
the steelwork is required where the frame is used for bracing.
TYPICAL SECTION EXTERNAL STEELWORK DETAILS

In-situ concrete stitch
In-situ concrete stitch
150 mm wide perfo

150 mm wide perforated
Reinforcement to suit Reinforcement to suit pocket along the e
Reinforcement to suit pocket along the edge
Structural Engineers Structural Engineers of slab unit at 1200
Structural Engineers of slab unit at 1200 mm
design welded to top design welded to top centreswith 10 mm
design welded to top centreswith 10 mm dia.
In-situ concrete stitch In-situ concrete stitch flange of steel beam at flange of steel beam at U bar per socket
flange of steel beam at U bar per socket
trough bottom trough bottom trough bottom
Shear stud Shear stud
Bison precast Bison precast

concrete Hollow concrete Hollow In-situ concrete stitch In-situ concrete stitch In-situ concrete stitch
Bison precast concrete Bison precast concrete Bison precast Bison

concrete
precast Bison precast
Reinforcement to suit Reinforcement to suit Hollow Core slab units Hollow Core slab units concrete
Hollow Core slab units Hollow concrete Hollow
Structural Engineers Structural Engineers with preformed troughs with preformed troughs with preformedCore slab unit
troughs Core slab unit
design design for tying requirements for tying requirements for tying requirements
mortar, by Builder, mortar, by Builder,
47
PART E
The Building Regulations Part E:2003 and the subsequent amendment May 2004 give guidance to the requirements for the
resistance to the passage of sound. For new build attached dwellings, two approaches may be made. Part E allows the developer
to choose between Pre Completion Testing (PCT) or, if available, a Robust Detail (RD) may be used by registering plots with Robust
Details Ltd. The Pre Completion Testing (PCT) and the Robust Detail (RD) requirements are given below.
Building Regulations Approved Document Part E
Airborne sound: New Build Change of use
Walls min 45dB min 43dB
Floors min 45 dB min 43dB termed DnT,w +Ctr
Impact sound:
Floors max 62 dB max 64 dB termed LnT,w
Robust Detail requirements (new build attached dwellings only)
Airborne sound: Min/Max Mean
Walls min 47dB min 50dB
Floors min 47 dB termed DnT,w +Ctr
Impact sound:
Floors max 60 dB max 57 dB termed LnT,w
48

SECTION 05
PART E
TYPICAL SOUND ATTENUATION DETAIL
Min. 100mm thick blockwork

medium density (1350-1600kg/m3)
Yelofon E-strip acoustic edge strip
Nominal 8mm thick parge coat
65mm thick sand/cement screed or
40mm thick proprietary screed, Flexible cavity closer
nominal 80kg/m2 mass per unit area
10mm Yelofon HD10+

200mm
100mm min.
200mm deep Bison Hollow Core

slab units (300kg/m2)
Gypsum-based board (nominal

8kg/m2) mounted on dabs on
cement/sand render (nominal
8mm) with scratch finish
100 75 100
275mm min.
49
PART E MASONRY BUILDINGS

ROBUST DETAILS SEPARATING FLOOR - CONCRETE E-FC-1
1 2 3 4 PRECAST CONCRETE HOLLOW CORE FLOOR

SLAB, SCREED
1. Floating floor See section 4 (Robust

Details Handbook) for suitable floating
floor treatment.
2. Screed 40mm (min) screed directly applied

to Hollow Core floor slabs - sand/cement or
proprietary screed nominal 80 kg/m2 mass per
unit area, see Appendix A
(Robust Details Handbook).
3. Structural floor 150mm (min) precast

concrete Hollow Core floor slab - 300kg/m2
mass per unit area.
4. Ceiling See section 3 (Robust Details

Handbook) for suitable ceiling treatment.
1 2 3 4 PRECAST CONCRETE HOLLOW CORE

FLOOR SLAB, SCREED LAID ON ISORUBBER
RESILIENT LAYER
1. Screed 65mm (min) sand/cement screed,

or 40mm (min) proprietary screed, nominal
80kg/m2 mass per unit area.
2. Resilient layer 6mm IsoRubber layer

with IsoEdge flanking strip.

concrete Hollow Core floor slab - 300kg/m 2
mass per unit area.

Handbook) for suitable ceiling treatment
which is dependent on floorplank
depth and supporting wall density.
The requirements for a robust detail are taken from the
Robust Details Part E Handbook. The latest requirements
should always be sought from Robust Details Ltd.
50

SECTION 05
PART E MASONRY BUILDINGS
1 2 3 4 PRECAST CONCRETE HOLLOW CORE

FLOOR SLAB, SCREED LAID ON ISORUBBER
RESILIENT LAYER
1. Screed 65mm (min) sand/cement screed,

or 40mm (min) proprietary screed, nominal
80kg/m2 mass per unit area.
2. Resilient layer YELOfon HD10+ with

E-strip perimeter edging and J-strip tape
for jointing.

concrete Hollow Core floor slab - 300kg/m 2
mass per unit area.

Handbook) for suitable ceiling treatment
which is dependent on floorplank
depth and supporting wall density.
51
4 14
5 15
6 16
7 17
8
PART E STEEL FRAMED BUILDINGS

TYPICAL DETAIL MASONRY WALLS TYPICAL DETAIL STUD WALLS

INTERNAL SEPARATING FLOOR AND WALL INTERNAL SEPARATING FLOOR AND WALL
335 mm min. 335 mm102

min. 100 100 30
min. 11
275 mm min. 9 275 mm min. 9
1 12
30 100 74 100 30 10 30 100 74 100 30 10
min. min. min. min.
2 13
1 11 1 11
2 2 14
12 12
3 13 3 13
min. Bison Units
min. Bison Units

150
200
3
min. Bison Units
min. Bison Units
min. Bison Units
min. Bison Units

4
150
100
150
200
150
200
5
150
100
150
100
6
4 4 15
14 14
7 16
5 15 5 15
8 17
6 16 6 16
9 18
7 17 7 17
10 19
8 8
1 Yelofon E-strip acoustic edge strip (by Cellecta). 10 Nominal 8mm thick parge coat (by Lafarge).
2 Minimum 40mm thick Gyvlon Screed (by Lafarge). 11 12.5mm thick Echeck wallboard (by Lafarge).
3 Minimum 10mm Yelofon HD 10+ (by Cellecta). 12 Skirting board.
4 Min. 12.5mm thick Lafarge Gypsum based ceiling 13 Yelofon J-strip acoustic jointing tape (by Cellecta).
board (min. 8kg/m2)335suspended
mm min. from a proprietary 102
30 100 100
9 14 150 or 200mm min. deep Bison Hollow
min. Core 11
support system. 275 mm min.
floor units (300kg/m
1
2
).
100 74 100 10 12
5 Acoustic quilt (by
30 30
min. Rockwool). min.
15 Grouted void between
2 P.C. units. 13
1 11
6 Soft joint.
16 12.5mm thick Echeck wallboard (by Lafarge) 14
2 12
7 Compressible filler board. encasement to steelwork. Restrained via
3 13 proprietary framing system.
min. Bison Units
min. Bison Units
8 Proprietary sliding brick anchor system.

150
200
3
17 12.5mm thick Echeck wallboard (by Lafarge)
9 Min. 100mm thick blockwork (medium density)
min. Bison Units
min. Bison Units
4
tacken up to u/side of floor providing 1.0 hour
150
100
150
200
1800 -2300g/m3.
fire protection to
5 steelwork.
150
100
4 14 15
52 5 15
7 16
8 17
6 16
9 18
7 17
10 19
8
6
4 15
14
7 16
5 15
8 17
6 16
9 18
7 17
05
10 19
8
SECTION

TYPICAL DETAIL MASONRY WALLS TYPICAL DETAIL MASONRY WALLS

EXTERNAL WALL AND SEPARATING FLOOR EXTERNAL WALL AND SEPARATING FLOOR
335 mm min.
102 100 100 30 102 100 100 30
min. 9 11 min. 11
275 mm min.
1 12 1 12
30 100 74 100 30 10
min. min.
2 13 2 13
1 11
2 12 14 14
3 13
min. Bison Units
min. Bison Units

min. Bison Units
min. Bison Units
150
200
3
150
200
3
min. Bison Units
min. Bison Units
4 4
150
100
150
200
150
100
5 5
150
100
6 6
4 14 15 15
7 16 7 16
5 15
8 17 8 17
6 16
9 18 9 18
7 17
10 19 10 19
8
1 Yelofon E-strip acoustic edge strip (by Cellecta). 13 Skirting board.

2 Minimum 40mm thick Gyvlon Screed (by Lafarge). 14 Min. 10mm Yelofon HD10+ (by Cellecta).
3 Yelofon J-strip acoustic jointing tape (by Cellecta). 15 Min. 12.5mm thick Lafarge Gypsum based ceiling
board (min. 8kg/m2) suspended from a proprietary
4 Flexible cavity closer.
support system.
5 Acoustic 102
quilt100(by100Rockwool).
30
11
min.
16 150 or 200mm min. deep Bison Hollow Core
6 Compressible
1 filler board. 12 floor units (300kg/m2).
7 Soft
2 joint. 13 17 2 No. layers of Echeck wallboard (by Lafarge)
14
encasement to steelwork. Restrained via
8 External leaf.
proprietary framing system.
9 Proprietary sliding brick anchor system.
min. Bison Units
min. Bison Units

150
200
3
10 Proprietary wall ties in accordance with approved taken up to u/side of floor providing 1.0 hour
4
document E (2003), section 2. fire protection to steelwork.
150
100
5
11 Nominal 8mm thick parge coat (by Lafarge). 19 Min. 100mm thick blockwork (medium density)
6 1800 -2300g/m3.
12 12.5mm thick Echeck wallboard (by Lafarge).
15
7 16 53
8 17
9 18
10 19
4 12
5 13
6 14
7
8 15

TYPICAL DETAIL STUD WALLS TYPICAL DETAIL STUD WALLS

INTERNAL SEPARATING FLOOR AND WALL INTERNAL WALL AND SEPARATING FLOOR
1 9 1 1 9 9
2 10 2 2 10 10
3 11 3 3 11 11
4
min. Bison Units
min. Bison Units
Units
min. Bison Units

min. Bison Units
Bison Units
5
150
200
150
200
150
200
min. Bison
6
min.
150
100
150
100
150
100
7
4 12 4 8 12 12
5 13 5 13 13
6 14 6 14 14
7 7 15
8 15 8 15 16
17
18
1 Yelofon E-strip acoustic edge strip (by Cellecta). 9 RSP 38 modified Lafarge stud system studs.
Two 50mm C studs at 600mm centres.
2 Minimum 40mm thick Gyvlon Screed (by Lafarge).
Facings.
3 Minimum 10mm Yelofon HD 10+ (by Cellecta). 2 layers Lafarge 15mm dBcheck wallboard
both sides.
4 10mm Aerofoil isolation layer.
Insulation.
5 Min.112.5mm thick Lafarge Gypsum based
9 ceiling 50mm glass
1
mineral wool density 19.5 kg/m9
3
.
2 10 10 Timber sole
2 plate. 10
support system.
3 11 11 Yelofon J-strip
3 11
acoustic jointing tape (by Cellecta).
6 Acoustic quilt.
4
min. Bison Units
min. Bison Units
min. Bison Units
min. Bison Units
7 Deflection Tolerance.
floor units5 (300kg/m2).
150
200
150
200
8 RSP 38 modified Lafarge stud system. 6

13 Grouted void between P.C. units.
150
100
150
100
7
4 12 8 to steelwork. Restrained via
encasement 12
5 13 proprietary framing system. 13
6 14 15 Deflection head detail. 14
7 15
8 15 16
17
54
18

4 12 8 12
5 13 13
6 14 14
7 15
8 15 16
05
17
SECTION
18

TYPICAL DETAIL STUD WALLS TYPICAL DETAIL STUD WALLS

EXTERNAL SEPARATING FLOOR AND WALL EXTERNAL WALL AND SEPARATING FLOOR
1 1 9 9 1 9
2 2 10 10 2 10
3 3 11 11 3 11
4 4
min. Bison Units
min. Bison Units
min. Bison Units
min. Bison Units

min. Bison Units
min. Bison Units

150
200
5 5
150
200
150
200
6 6
150
100
150
100
150
100
7 7
4 8 12 12 8 12
5 13 13 13
6 14 14 14
7 15 15
8 15 16 16
17 17
18 18
1 Tyvek breather membrane 12.5 moisture resistant 10 Skirting board.

wallboard and 36mm polyfoam plus.
11 Minimum 40mm thick Gyvlon Screed (by Lafarge).
2 Yelofon E-strip acoustic edge strip (by Cellecta).
12 Minimum 10mm Yelofon HD 10+ (by Cellecta).
3 Yelofon J-strip acoustic jointing tape (by Cellecta).
4 Timber sole plate. floor units (300kg/m2).
1 9
5 10mm Aerofoil isolation layer. 14 Min. 12.5mm thick Lafarge Gypsum based ceiling
2 10
6 Flexible
3
cavity closer. 11 support system.
7 Acoustic
4 quilt (by Rockwool).
15 2No. layers of Echeck wallboard (by Lafarge)
min. Bison Units
min. Bison Units
8 External
5 cladding 102mm brick or 100mm encasement to steelwork. Restrained via
150
200
block
6 + 16mm render. proprietary framing system.
150
100
9 Lafarge
7 stud system studs. 16 Deflection tolerance.
CS90/Y
8 Lafarge C studs at 600mm centres.
12 17 Deflection head detail.
Facings.
13
1 layer Lafarge 12.5mm firecheck wallboard 18 Lafarge stud system (see above).
14
on 1 layer 12.5mm vapourcheck wallboard.
Insulation. 15
90mm rockwool flex.
16
17
55
18
1 8
2 9
3 10
min. Bison Units
min. Bison Units

150
200
150
100
BUILDING REGULATIONS 4 11
5 12
6 13
PART E CONCRETE WALLS

CONSTRUCTION SOLUTIONS 175 mm
TYPICAL DETAIL SECTION TYPICAL DETAIL SECTION

A TYPICAL INTERNAL SEPARATING WALL A TYPICAL INTERNAL SEPARATING WALL
7 102 100 150 7

1 8 1 8 8
2 9 2 1 9 9
3 10 3 2 10 10
3
min. Bison Units
150Units
min. Bison Units
min. Bison Units
min. Bison Units
min. Bison Units

150
200
150
200
200
4
min. Bison
5
150
100
150
100
150
100
4 11 4 6 11 11
5 12 5 7 12 12
6 13 6 13 13
14
175 mm 175 mm 150 mm
1 Yelofon E-strip acoustic edge strip (by Cellecta). 8 Dry pack mortar.
2 Minimum 40mm thick Gyvlon Screed
7 (by Lafarge). 9 Skirting board. 102 100 150
3 Minimum
1 10mm Yelofon HD 10+ (by 8
Cellecta). 10 Yelofon J-strip acoustic jointing tape (by Cellecta).
8
4 Min.
2 12.5mm thick Lafarge Gypsum9based ceiling 11 150 or 200mm
1 min. deep Bison Hollow Core9
board (min. 8kg/m2) suspended from a proprietary floor units (300kg/m2).
3
support system. 10 2 10
12 In-situ concrete infill.
3
min. Bison Units
min. Bison Units
min. Bison Units
min. Bison Units
5 Acoustic sealant.
13 3mm Plaster skim on
150
200
150
200
4
6 175mm thick concrete wall. 15mm Lafarge wallboard
12mm Metal 5 furring channel on dabs
150
100
150
100

35mm cavity with
4
15mm Lafarge wallboard 11 6 11
25mm mineral fibre.
12mm Metal furring channel on dabs 7 12
5 12
35mm cavity with
6
25mm mineral fibre. 13 13
14
175 mm 150 mm
56

7 102 100 150
1 8 8
2 9 1 9
3 10 2 10
3
min. Bison Units
min. Bison Units
min. Bison Units
min. Bison Units

05
150
200
150
200
4
5 SECTION
150
100
150
100
4 11 6 11
5 12 7 12
6 13 13
PART E CONCRETE WALLS 14
175 mm 150 mm
TYPICAL DETAIL SECTION TYPICAL DETAIL SECTION

THROUGH A TYPICAL EXTERNAL WALL THROUGH A TYPICAL EXTERNAL WALL
102 100 150 7 102 100 150
1 8 8 8
2 1 9 9 1 9
3 2 10 10 2 10
3 3
min. Bison Units
min. Bison Units
min. Bison Units
min. Bison Units

min. Bison Units
min. Bison Units

150
200
150
200
150
200
4 4
5 5
150
100
150
100
150
100
4 6 11 11 6 11
5 7 12 12 7 12
6 13 13 13
14 14
175 mm 150 mm 150 mm
1 Yelofon E-strip acoustic edge strip (by Cellecta). 8 3mm Plaster skim on
15mm Lafarge wallboard
2 Yelofon J-strip acoustic jointing tape (by Cellecta).
12mm Metal furring channel on dabs
3 Dry pack
102 100
mortar.150 35mm cavity with
8 25mm mineral fibre.
4 Flexible cavity closer.
1 9 9 Skirting board.
5 In-situ concrete infill.
2 10 10 Minimum 40mm thick Gyvlon Screed (by Lafarge).
6 150mm concrete wall.
3 11 Minimum 10mm Yelofon HD 10+ (by Cellecta).
min. Bison Units
min. Bison Units

150
200
4
15mm Lafarge wallboard 12 150 or 200mm min. deep Bison Hollow Core
12mm Metal furring channel on dabs floor units (300kg/m2).
5
150
100
35mm cavity with

6 11 13 Min. 12.5mm thick Lafarge Gypsum based ceiling
25mm mineral fibre.
7 12 support system.
13 14 Acoustic sealant.
14
150 mm
57
TECHNICAL SPECIFICATIONS & HEALTH AND SAFETY
BISON PRECAST FLOORING

SPECIFICATIONS
MANUFACTURE
1.1 Bison floors are manufactured by the long line prestressed method using slip form or extrusion techniques.
The units are cast on heated steel beds within an enclosed factory environment.
1.2 The materials used in the manufacture of Bison floors comply with the relevant British Standard for that material.
1.3 An air entraining agent complying with BS EN 934-2-2001 is included in the concrete mix to improve workability.
1.4 Reinforcement is generally 5mm diameter high tensile wire or 12.5mm diameter strand complying with the
requirements of B.S.5896:1980.
1.5 Bison units are sawn to length on the manufacturing bed and are supplied as standard with plain sawn ends
with open cores.
DIMENSIONS
2.1 Bison units are manufactured in nominal sizes as follows :

Standard nominal width of all units is 1200mm.
Solid : Depth 75mm 100mm
Hollow : Depth 150mm 200mm 260mm
300mm 250mm 400mm
450mm
2.2 Cross-sectional tolerances are within the limits set out in clause 6.2.8.3. of B.S. 8110:1997. Length tolerances are 20 mm.

2.3 Bison units will have an upward camber due to pre-stressing as described in clause 6.2.8.4. of B.S.8110:1997.

2.4 Edges are shaped to form a grout joint giving a shear key to distribute load to adjacent units. Where non-standard widths
are provided the edge will be rough cut from a standard unit.
FINISHES
3.1 Concrete surface finish to soffit is Type A finish as described in clause 6.2.7.3. of B.S.8110:1997.
The soffit is suitable for the direct application of a textured paint finish where this is applied in accordance with
the manufacturers instructions.
Where a plaster finish is intended it may be necessary to use a bonding agent in accordance with the instructions
of the plaster manufacturer. Plaster finishes are not recommended on longer spans.
3.2 Sides and top surfaces are as extruded as described in Table 5.5 of B.S.8110:1997.
3.3 Units may accumulate water within the cores due to exposure during the construction programme. The General
Contractor should drill weep holes as necessary, or keep them clear where they are provided during manufacture.
58

SECTION 06
SPECIFICATIONS
DESIGN
4.1 The design of Bison units is in accordance with the requirements and recommendations of B.S.8110:1997
The Structural Use of Concrete.
4.2 Load/Span capacity : The reinforcement pattern within a Bison section will vary according to the design
loading specified.

4.3 Exposure Condition : The standard Bison section is suitable for a XCI exposure classification as defined
in Table 3.2 of BS 8500:2002. Other exposure classes can be adopted subject to design approval from Bison
Technical Department.

4.4 Fire Resistance : Fire resistance is based upon the tabulated data contained within B.S. 8110 Part 2 Section 4.
Sections are available for fire periods of 1 hour or 2 hours, without the addition of further finishes.These periods of
fire resistance may be further enhanced by the application of appropriate finishes.
4.5 Serviceability : The standard Bison section is designed to meet the criteria of Class 3 as set out in clause 4.1.3
of B.S.8110.1997 Designs to Class 1 and Class 2 are available if required.

4.6 Sound Insulation : The requirements of The Building Regulations are that a floor construction incorporating
the use of precast concrete units should have a minimum mass which is dependent upon whether the finishes to
the top surface are directly applied or are on a separating layer. The mass of Bison unit sections are given in the
technical data and are net weights of standard hollow sections.
4.7 Horizontal & Vertical Ties : Ties necessary to satisfy the requirements for accidental damage should be
specified by the Engineer with responsibility for the design of the overall structure in accordance with the
Code of Practice.
4.8 Bearings : Level and structurally adequate bearings for Bison precast units should be provided by other
contractors. These should generally be 100 mm for masonry or 75 mm for concrete or steelwork, but may be
reduced in accordance with clause 5.2.3 of B.S.8110:1997.

4.9 Holes : Small holes up to 60 mm diameter may be drilled on site through the Hollow Cores, care being taken
to avoid damage to the reinforced ribs. Larger holes may be cut subject to the design capacity of the slab.

4.10 Grouting : Joints between units should be grouted with a 30 N/mm2 concrete using a 6 mm nominal
aggregate size.
4.11 Propping : Where the slab design requires site propping, this should be carried out in strict accordance with the
Bison drawings.
59
TECHNICAL SPECIFICATIONS & HEALTH AND SAFETY

SPECIFICATIONS
QUALITY ASSURANCE
Bison operates a Quality Management System which complies with the requirements of ISO 9001: 2000 for the
following scope: design, manufacture and erection of ancillary cube products (including reinforced and normally
reinforced concrete). Prestressed floor units are subject to end product testing. Prestressed and ancillary concrete
is subject to full design approval, traceable to current codes of practise statutory/regulatory requirements.
All Bison U.K. factories have been assessed by the British Standards Institution (B.S.I.) and awarded Certificates of
Assessed Capability under the scheme covering Quality Assurance for the manufacture of precast concrete floors.
As a customer, you can be sure that all aspects of our production, design detailing and quality control have been
independently inspected and have achieved the high level of competence and quality required by the
British Standards Institution.
The company maintains a policy of continuous development, and reserves the right to change specification and
details without prior notice.
FM 00011

HEALTH & SAFETY
This information must be read in conjunction with:
Health , Safety & Welfare Attendances (supply & erect only).
C.O.S.H.H information sheet Precast Elements.
Unit weight table.
Information sheet: Lifters & Chains, supplier hire or purchase.
Technical Information Sheet, Handling & Fixing Instructions for:
Sheet No. TI/304/10 Hollow Core
Sheet No. TI/304/11 Solid Composite Precast Elements
Sheet No. TI/304/12 Prestressed Housebeam & Deepbeam
Sheet No. TI/304/13 Bison Precast Stairs & Landings
Sheet No. TI/304/15 Floor products with cast-in lifters
Sheet No. TI/304/16 Trailasafe
The Bison website www.bison.co.uk contains detailed information and data sheets on all products.
Alternatively call the Health & Safety Department at our Burton office Tel 01283 495000 .
60

SECTION 06
HEALTH AND SAFETY
Safety Dos & Donts

The dos & donts listed below are by no means fully exhaustive-you should also refer to the current issue of the Precast
Flooring Federation Code of Practice available on Tel 0116 253 6161.
Do not alter the product without written permission from Bison Design Office, altering the product may compromise
its structural integrity and lead to failure. This includes notching, hole forming, shortening, narrowing the unit etc.
Do not alter the product in-situ, any permissible alterations must be completed on a flat stable platform. i.e. on the
ground or floor area.
Do not allow anyone to walk or work beneath the product whilst it is being hoisted or suspended.
Do not work in areas without the appropriate perimeter edge protection, handrails, guardrails, platforms or stages.
Do not access working areas without properly constructed, maintained, secured and illuminated, stairways, ramps,
ladders or the like.
Where lifting hooks are specified within a contract, do hoist the units by crane using ALL the lifting points in the top
surface provided for that purpose. Prior to lifting safety chains must be loosely slung around the underside of the
unit. The safety chains may only be released immediately before the slab is placed in its final position.
For insurance purposes, Bison do not supply or hire lifters or chain sets. Please refer to our information sheets for
details of supplier hire or purchase.
Do not run plant or store equipment on the precast floor before it is grouted and cured. Once cured do not exceed
the loads specified by the engineer.
Do use a passive fall protection system wherever reasonably practicable considering all heights where the potential
fall distance could result in an injury.
Do ensure that perimeter edge scaffolding is positioned no more than 900mm below the bearing level particularly on
masonry construction.
Do ensure all voids created whilst placing units are adequately protected during and after erection.
Do ensure all brickwork, blockwork or concrete is adequately cured, stable and fit to receive precast concrete units,
and that steelwork is stable.
Do ensure the stability of support beams, lintels etc. is considered, particularly the rotation of support member due
to unequal loading.
Do ensure you include allowance for site handling by referring to the unit weight table.
Do ensure that all lifting equipment is supplied, used and inspected in accordance with current legislation.
Do ensure all lifting operations are completed and in accordance with current legislation.
Do wear adequate personal protective equipment (PPE) whilst handling or cutting concrete.
NOTE; Due to the principle constituents of cement, the liquid released whilst drilling drainage points etc is likely to
have a caustic effect on the eyes and skin. For further information or to obtain the latest issue COSHH data sheet for
cement call our Health & Safety Department at our Burton office Tel 01283 495000.
61
RELATED PRODUCTS
Lifting hook being loaded into machine.
From transport to final position with ease and speed.
Bison Lifting Hooks

This is a unique system from Bison, available with our Hollow Core flooring. The hooks are machine inserted during the production
process, for which Bison holds the European patent. The hooks enable faster, safer and more accurate erection. They also offer
cost savings by minimising damage to soffit and blockwork bearings.
HEATED AND COOLED SLABS

Bison and velta have joined forces to provide an innovative, sustainable and cost effective
floor heating and cooling system which is precast in to Bison flooring products.
DESIGN MANUFACTURING
The system utilises low temperature water for heating and high Precast concrete elements are designed and constructed in
temperature water for cooling to condition a building, which the factory with a velta PE-Xa pipe matrix cast directly into the
provides the opportunity to use renewable energy sources. precast slab or Hollow Core unit to offer a combined heating
A sustainable alternative, which can significantly reduce and cooling solution.
CO2 emissions over the life of the building. This service covers the design, off-site manufacture and
Substantial savings in investment, maintenance and installation of precast, pre-stressed Hollow Core flooring,
operational costs, compared to conventional precast multi-storey wall panel structures and other bespoke
air-conditioning systems. solutions with an in built heating and cooling capability.
The requirements for flexible space utilisation and variable
partitioning are easily met.

CONSTRUCTION
Off-site production reduces construction programmes
Clear benefits to occupants, no noise and no draughts,
and improves quality control.
producing a comfortable and productive environment.
Elimination of suspended ceilings can reduce building
62 height and lower construction costs.

SECTION 07
HEALTH AND SAFETY PRODUCTS
Health and Safety is a major concern for Bison, and we have developed a range of methods and systems which help to
ensure that anyone using Bison products can do so with minimal risk to themselves or others.
Trailasafe
Trailasafe is designed to prevent or mitigate injuries
resulting from falls from trailer decks. Comprising
synthetic mesh suspended from a series of brackets
housing support arms, the system arrests the fall of
personnel, absorbing the energy of their descent and
ensuring their safety. Fully demountable, the system can
be stored within the vehicle or at the unloading point.
THE BISON AIR MAT

The Bison Air Mat system has been tested by the BRE
and approved by the HSE. The Bison Air Mat system
comprises a series of interconnected and interlinked
mats available in a wide range of standard sizes. Using
a combination of modules they will accommodate

almost any floor area. Where the edges of an area to be
protected are open, or have large vertical voids that may
pose the hazard of roll-off fall to a lower area, special
parapet and corner mats can be provided.
Hole Covers
Voids such as service holes, formed in precast floor units
are trip hazards and have the potential to cause serious
injuries. Bisons solution is the Hole Filler: a strong yet
slimlined product which is suitable for most holes.
The yellow, anti-slip cover is fully reusable and comes in
two sizes, 250mm or 350mm square. Each may be either
screwed down or fitted without the need for power tools,
by spreading the unit legs, locking it into position.
63
BISON ONLINE
www.bison.co.uk
For further information on Bison Precast Concrete Flooring and the full
range of Bison products and services, visit www.bison.co.uk or call the
Bison sales team on 01283 495000
64

SECTION 08
FLOORS
HOLLOW CORE HOLLOW CORE SOLID
FLOORS COMPOSITE FLOORS COMPOSITE FLOORS
BEAM AND BLOCK COMPOSITE STEEL HOLLOW CORE

FLOORS BEAM DESIGN INSULATED FLOORS
FRAMES STADIA STAIRS
HEALTH AND SAFETY

LIFTING HOOKS TRAILASAFE AIR MATS
65
BISON NOTES
66

SECTION 09
67
BISON CONCRETE
PRODUCTS Ltd
Millennium Court,
First Avenue, Centrum 100,
Burton-Upon-Trent
DE14 2WR
Telephone: 01283 495000

Facsimile: 01283 544900
Email: concrete@bison.co.uk
Web: www.bison.co.uk
OTHER BROCHURES
AVAILABLE
Staircases
Stadia Products
Crosswalls
Lattice Flooring
Beam & Block Flooring
Safety Systems
All dimensions and illustrations in this publication are intended for guidance only and shall not constitute a sale by description.
All dimensions given are nominal and Bison Limited may modify and change the information, products and specifications from time
Printed on 100% recyclable paper to time for a variety of reasons without prior notice. The information printed in this publication at the time of going to print, to the
best of our knowledge, is correct and is not intended to have any legal effect, whether by way of advice, representation or warranty
using vegetable based inks
(express or implied). We accept no liability whatsoever (to the extent permitted by law) if you place any reliance on this guide you
must do so at your own risk.
All rights reserved. Copyright in this publication belongs to Bison and all such copyright may not be used, sold, copied or
August 2007 reproduced, in whole or part, in any manner or in any media to any person without prior written consent.

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Uniclass

LEADING THE PRECAST INDUSTRY SINCE 1919

It provides a range of products and solutions to choose from and is supported by

For EXTENSIVE TECHNICAL DETAILS PLEASE VISIT our website: www.bison.co.uk

HOUSING PRODUCTS SINGLE OCCUPANCY 02

HOUSING PRODUCTS MULTIPLE OCCUPANCY 03

COMPOSITE STEEL BEAM DESIGN 04

SPECIFICATIONS & HEALTH AND SAFETY 06

Excellent customer service, investment in research and development and an

RESOURCE and Capacity Innovation

We can boast a number of unique developments such as

mechanically inserted Lifting Hooks and the Trailasafe fall

For EXTENSIVE TECHNICAL DETAILS PLEASE VISIT our website: www.bison.co.uk

have been produced in conditions designed to have as little team represents

impact on the environment as possible. Swadlincote is the the very best

most environmentally friendly factory of its kind in in the industry

the world. and is on hand

Customer Driven advice for any

Our investment is focused on meeting and exceeding project, large

approach with a custom-made casting.

Bisons nationwide coverage ensures that support is

the design of many Bison products including Hollow Core

slab units, Composite Hollowcore slab units and Solid

Composite slab units.

Bison Concrete Floors are prestressed precast

BISON HOLLOW CORE BISON HOLLOW

The floor may be designed in the unpropped or partially

propped condition to suit particular requirements.

For EXTENSIVE TECHNICAL DETAILS PLEASE VISIT our website: www.bison.co.uk

BISON SOLID THE BISON

shuttering, provides a structural performance far superior Floor Heating and

and cooling systems and now offers the widest range of

INSULATED HOLLOW CORE solutions specifically designed to meet the requirements of

Bison has a prolonged proven track record

However, the types of constructional components used in these buildings are

For EXTENSIVE TECHNICAL DETAILS PLEASE VISIT our website: www.bison.co.uk

from site conditions, constructional constraints or the Building

and products provide the architect and the structural

engineer with flexibility in design as well as satisfying the

Building Regulations, particularly with reference to sound

attenuations (Part E), Thermal Performance (Part L) and

Structural Robustness (Part A).

HOLLOW CORE FLOORS

For EXTENSIVE TECHNICAL DETAILS PLEASE VISIT our website: www.bison.co.uk

Multi storey car park in Nuneaton where 10,000m2 of

Drake Circus Shopping Centre located in Plymouth

HOSPITAL & STADIA

Millennium Stadium in Cardiff used over 48,000m2 of

HOLLOW CORE FLOORS

150mm Sound Slab unit profile

75mm unit profile

100mm unit profile

150mm unit profile

200mm unit profile

250mm unit profile

260mm unit profile

300mm unit profile

350mm unit profile

400mm unit profile