LETTER SIZE Materials Specification and General Notes
LETTER SIZE Materials Specification and General Notes
LETTER SIZE Materials Specification and General Notes
OWNER :
PREPARED BY :
The building site shall be cleared of any existing elements that will obstruct construction works.
The setback of the building shall be first verified from the plan shall be marked as the reference line
from which to start all measurements.
2. Building Outline
Stake out accurately the line of the buildings and the other structures included in the contract and
established grades therefore, after which secure approval by the architect before any excavation work
is commenced.
3. Excavation
All excavations shall be inspected and approved before pouring of any concrete, laying of
underground services of placing of fill materials.
When concrete work is hard enough to resist pressure resulting from fill, backfilling may then be
done.
All filling materials shall be placed in layers, each layer being thoroughly compacted and rammed by
wetting, or rolling. All filling materials shall be free from roots, stumps, and other perishable or
objectionable matter.
5. Gravel Bedding
Gravel bed materials shall be G-1 placed at 75mm thick and shall be thoroughly compacted from
perishable materials.
6. Soil Treatment
The contractor shall provide soil treatment which shall be directly poured within the area to be
covered by work.
Use Chlordane 1% concentrate or approved equivalent diluted with water 1 part concentrate: 36 arts
water.
DIVISION 3 - CONCRETE:
1. General Condition.
All concrete works shall conform to standard specifications of the Philippine National Standard for
Construction materials.
Full cooperation shall be given to other trades to install embedded items or rough-ins.
2. Materials.
Sand – Natural sand particles, washed, free from injurious materials such as slit, loam, clay, salts,
and organic materials; shall be conform to PNS – 18 : 1984
Gravel – ¾ crushed gravel, shall easily fit into form and in between reinforcing bars; shall be conform
to PNS – 18 : 1984.
Water – Clean, fresh, free from salt, alkali, oil and organic materials that may be deleterious to
concrete or steel.
Concrete shall have a 28 day cylinder strength of 3000 psi for footing and slab on fill and 4000 psi for
column, beams, slab, canopy, and gutter.
4. Placing of Concrete.
Concrete shall be conveyed from mixer to forms as rapidly as practicable by methods that will prevent
segregation or loss of ingredients. There shall be no vertical drop greater than 1.5m. except where
suitable equipment is provide to prevent segregation and where especially authorized.
Concrete shall be consolidated with the aid of mechanical vibrating equipment and supplemented by
hand spading and tamping. Vibrator shall not be inserted into lower course that have commence
initial set; Reinforcement already in set should not be disturbed by vibrators.
5. All concrete shall be moist cured for a period of not less than seven (7) consecutive days by
covering with burlap or other materials saturated with water and keeping the covering wet by
spraying or intermittent hosing.
DIVISION 4 - MASONRY :
1. General Conditions
All concrete hollow blocks shall be a minimum face shell of 1’’ thick minimum compressive. Strength
shall be 900 psi for class A 750 psi for Class B.
All units shall be stored for a period of not less than 28 days (including curing period) and shall not be
delivered to site prior to that time unless the strength equal or exceed those mentioned in these
specifications.
2. Materials.
6’’ thick concrete hollow blocks – CHB shall be 150mm for all exterior walls, and where pipes be
rough in, walls and catch basin and septic tank.
4’’ thick concrete hollow blocks – CHB shall be 100mm thick for all interior walls.
All masonry shall be laid plumb, true to line, level and accurately spaced to coarse and each coarse
breaking joint with the source below.
Bond shall be kept plumb throughout, and shall be solidly bedded in mortar.
Mortar shall be class A, mortar mixed (1:2) consisting of one bag cement, 2 part sand and a suitable
amount of water to obtained pliable paste.
5. Workmanship.
Masonry work shall be done only by skilled work man in the most acceptable standards of the trades.
All structural designs and specifications shall be in accordance with the following codes
Steel reinforcement shall be provided as indicated, together with all necessary tie wires spacers,
Support and other devices necessary to install and secure the reinforcement properly.
Reinforcement shall be placed accurately and securely in placed by used of metal or concrete
Supports, spacers and ties. Support shall have sufficient strength to maintained operations.
All supports shall be used in such a manner that they will not be exposed or contribute in any
2. Materials.
Steel bars – Reinforcing steel bars shall be round deformed structural grade.
Tie wire – Reinforcing steel bars shall be tied by G.A. 16 galvanized wire.
I – Beams – Shall be in proper fabrication in accordance with the specification of structural engineer.
3. Installation.
Full weld and proper anchor bolt and machine bolts and nuts connection at trusses neatly and
properly.
See also splicing, anchorage and other structural details set by the structural engineer who signs and
sealed structural plans.
Submit manufacturers warranties properly filled up in owners name and registered with the
manufacturers as project closed out.
2. Materials.
Ridge Roll and Flashing – shall be galvanized steel G.A. 24 pre painted.
Roof Insulation – shall be 15mm thick. Foam with one side aluminum foil, sealed with pressure
sensitive adhesive paints.
Water Proofing Materials – membrane cold applied with sufficient coating for gutter, plant box and
toilets.
3. Applications.
Surface shall be free from any oil, grease, dirt, laitance and other loose materials, free from any void,
cracks and irregularities.
Waterproofing membrane shall be evenly applied by brush and allowed to cure at least one day prior
to succeeding coat.
Roof shall be fasten tightly to purlins by teck screw. Rivets and should be sealed by sealant
Lumber shall be approved quality of the respective kind required for the various parts of the works,
weel seasoned, free from loose knots, saps, or other imperfections impairing its strength durability or
appearance. All exposed wood works shall be smoothly dressed and sand paper.
2. Materials.
¾ thick plywood for all lavatory counter cabinets with ½ thick wood edging door.
2x2 ceiling joist with strip spaced at 16’’ and 24’’ respectively for all exterior ceiling.
Gypsum board on metal furring on all interior ceiling except for those areas with exposed under slab
ceiling.
3. Installation.
All ceiling frame shall be tie properly with metal hanger to prevent from sagging.
All carpentry works shall be done only by skilled work man in the most acceptable standards of trade.
DIVISION 8 – PLUMBING:
1. General Conditions
Plumbing works shall conform to the restriction of the code of sanitation of the Philippines, and the
National Plumbing Codes of the Philippines.
Conduct test for leakage: include pressure testing and disinfection of water supply if necessary.
2. Materials.
Water supply pipes – cold and hot water line shall be Moldex PPR pipes or approved equivalent
Down spout, drainage pipe shall be scheduled polyvinyl chloride by Moldex or approved equivalent.
3. Installation.
All plumbing works shall be done under the direct supervision of a licensed sanitary engineer or
master plumber.
Provide correctly located opening of proper sizes required in wall and floor for passage of pipe.
All things to be rough – shall be thoroughly clean and free from all rust, scale, and paint.
All changes in pipe size on soil, wash and drain lines shall be provided with reducing flitting.
All pipes shall be cut accurately to measurements and worked into place without springing or forcing.
Care must be taken as not to weaken the structural portion of the building.
DIVISION 10 – ELECTRICAL
1. General Condition.
All installation shall be done in a workman like manner and shall include all necessary works that may
not be clearly indicated in the plans but necessary to attain the purposed or intent of the contract.
The plans indicate the general layout of the system and the location of outlets are diagrammatic, and
may be adjusted as required by the architect before installation.
Electrical works shall be done in accordance with the approved plans and loads and shall conform
pertinent provision of the Philippine Electrical Code.
Electrical works shall be done only under the supervision of a qualified professionals.
All materials to be supplied shall be new and of high quality suitable for the location and purposed.
Materials shall be standard products of reputable manufacturers.
2. Materials.
Conduit – shall have insulation resistance and electric strength, shall be none flammable, conforming
to PNS 14: 1987 of uPVC Electrical Conduits, Flexible Conduit type.
Wires – shall meet PNS 662: 1992 and PNS 1086 : 1992 on electric wires and cables and PNS 35 :
1990 on thermo plastic insulated wire and cables by Phelps dodge or approve equivalent.
Switches – shall conform to PNS 57 : 1988 on snap switches and PNS 117 : 1988 on manually –
operated switches shall be flush type mounted 1.37m from finished floor to center of device. National
brand.
Convenience outlet – shall be flush type national brand, mounted on 0.30m from finished floor for
general outlet, 0.50m above working counter to center of device.
Circuit breaker and panel board – shall conform to PNS 519 : 1991 on circuit breaker, shall be
recessed mounted 1.82m above finished floor to top of the panel, national or Westinghouse, bolt in
type.
3. Installation.
Conductors and conduits system shall be provided as shown in drawings, and no change in sizes
shall be made without approval by the architect or his representative.
All connections and splices shall be properly seals with approve electric tape.
Provide, as indicated, switches and receptacle with the proper cover plates.
Lighting outlet at ceiling shall be provided with 4’’ Ga. 18 flexible conduits.
Connections from fixtures to boxes shall be made by using PW wire and flexible conduits.
No wire shall be drawn into raceway until it is complete with all necessary flitting’s, boxes or supports.
Connections shall be securely fasten such as not to loosen under vibration and normal strain.