Sample Construction Specifications

ARCHITECTURAL SPECIFICATIONS This set of Specifications shall govern the methods of construction and the kinds of materials to be used for the proposed building shown in the plans and detail drawings. The plans, detail drawings and these Specifications shall be considered as complementing each other, so that what is mentioned, or shown in one, although not mentioned or shown in the other, shall be considered as appearing on both. In case of conflict between the two, the same should be referred to the designing Architect/Engineer for resolution. GENERAL CONDITIONS – All parts of the construction shall be finished with first class workmanship, to the fullest talent and meaning of the plans and these Specifications, and to the entire satisfaction of the Architect/Engineer and the Owner. The construction shall conform to all the requirements of the National Building Code, as well as the local rules and regulations of the Municipality/city of Kasibu Nueva Vizcaya, Philippines. CLEARING THE SITE – The building site shall be leveled according to the plans and cleared of rubbish, roots and other perishable and objectionable matters to a suitable subgrade. All such unsuitable materials shall be removed from the building site and spread uniformly over the areas adjacent to the proposed building, or otherwise disposed of as may be directed by the Architect or Engineer in charge of the construction. STAKING OUT THE BUILDING LINES – The building lines shall be staked out and all lines and grades shown in the drawing established before any execution is started. Batterbaords and reference marks shall be erected at such places where they will not be disturbed the excavation of the building. EXCAVATION – All excavations shall be made to grade indicated in the drawings. Where the building site is covered with any kind of fill, the excavation for footings should be . 500 meter where the stratum for safe bearing capacity of the soil is reached. Whenever water is encountered in the excavation process, it shall be removed by bailing or pumping, care being taken that the surrounding soil particles are not disturbed or removed. BACKFILLS – After concrete for foundations is hard enough to withstand pressure resulting from fills, the materials removed from excavations shall be used for backfill around them. Backfill and fills shall be placed in layers not exceeding 150mm in thickness, and each layer shall be thoroughly compacted by wetting, tamping and rolling. CONCRETE WORKS – All concrete shall be mixed thoroughly until there is a uniform distribution of the cement and aggregates, and should be deposited as nearly as practicable in its final position, care being taken to avoid segregation of the aggregates. Water to be used for mixing concrete shall be clean and free from injurious amount of oil, acids, alkalis, salt and other organic materials. PROPRTIONING OF CONCRETE – All concrete works shall be done in accordance with the standard specifications for plain and reinforced concrete as adopted by the Government. Cement, to be used shall be Holcim Portland Cement, pozzolan cement or any other equivalent brands more readily available in the locality. Alternative cements so selected must meet the requirements of Portland and pozzolan cements, and approved by the Architect or Engineer in charge of construction. The following proportions of concrete mixtures shall be used for the various parts of the building: Columns and footings Conc. Holl. Blk. Footings Reinf. Conc. Beams and Slabs Concrete slab foot on fill Septic Vault cover - Class A (1:2:4) - Class B (1:2-1/2: 5) - Class A (1:2:4) - Class C (1:3:6) - Class A (1:2:4) Class A concrete shall be a mixture of 1 part cement, 2 parts fine aggregate and 4 parts coarse aggregate by volume, plus enough clean water to make the mixture into a pliable paste. Class B concrete shall be a mixture of 1 part cement, 2-1/2 parts fine aggregate and 5 parts of coarse aggregate by volume, plus enough clean water to make the mixture into a pliable paste. Class C concrete shall be a mixture of 1 part of cement, 3 parts fine aggregate and 6 parts coarse aggregate by volume, plus enough clean water to make the mixture into pliable paste. The fine aggregate for concrete shall consist of natural sand, or inert materials with similar characteristics, having clean, hard and durable grains, free from \organic matter or loam. The coarse aggregates for concrete shall consist of crushed rock of durable and strong qualities, or clean and hard gravel. Size of the coarse aggregate to be used shall vary from 20mm to 40mm (3/4” to 1-1/2”). FORMS FOR CONCRETE WORKS – All forms for concrete works shall be properly braced or connected together so as to maintain the correct position and shapes of the concrete members. Forms shall be constructed sufficiently tight to prevent bulging and seepage of water. Forms shall not be removed until the concrete has attained sufficient strength to support its own weight and any loads that may be placed on it. Side forms of beams and girders may be removed earlier that the bottom forms but additional posts or shoring must be placed under the beams or girders until they have attained their strength. CONCRETE SLAB FLOORS ON FILL FOR LITTER AREA – Concrete slabs on fill shall be poured on a gravel bed of not less than 100mm thick. Each concrete slab course to be poured shall not be more than one meter wide, and each course shall be poured alternately to the indicated floor finish. STEEL REINFORCING BARS – All steel reinforcing bars to be used in this construction shall consist of round deformed bars with lugs or projections on their sides to provide a greater bond between the concrete and the steel. All steel reinforcing bars to be used shall be (specify brand) . All steel reinforcing bars shall be accurately placed and secured against displacement by tying them together at each bar intersection with Gauge No. 16 galvanized iron wire. The steel reinforcing bars indicated for footings, columns, slabs, beams, girders and other concrete members shall all conform to the number, size and spacing as indicated in the drawings of schedule of steel reinforcements. No metal reinforcement shall be installed in place unless it is free from rust, scale or other coatings, which will destroy or reduce the bond with concrete. CONCRETE HOLLOW BLOCKS – Concrete hollow blocks to be used in this project shall be (specify brand) . All exterior concrete hollow blocks to be used for first floor walls shall be at least 150mm thick while concrete hollow blocks for interior walls unless otherwise indicated, shall be 100mm thick. For interior CHB walls where plumbing pipes and fittings shall be located, the thickness shall be at least 150mm. Concrete hollow block to be used for walls above the first floor, shall be 100mm thick. The concrete hollow block walls shall be laid, and the cells filled with cement mortar consisting of 1 part Portland cement and 3 parts sand by volume. They shall be reinforced with round deformed bars 10mm diameter, spaced not more than 0.80m on centers, bothways. All exposed surfaces of concrete hollow block walls shall be finished with the specified materials indicated on the elevation drawings. The mixture of cement plaster for concrete hollow block wall finshes indicated in the drawing shall be 1 part cement, 1 part time and 3 parts sand. FLOOR FINISHES – The materials to be used as floor finishes for the rooms of the building shall be as follows: Entrance Porch ------------------------------- (Specify) Living Room ---------------------------------- (Specify) Dining Room ---------------------------------- (Specify) Kitchen --------------------------------------- (Specify) Maid’s Room --------------------------------- (Specify) Bedroom (First Floor) ----------------------- (Specify) Carport --------------------------------------- (Specify) Bedrooms (Second Floor) and Hall------------ (Specify) Balcony (Second Floor) ----------------------- (Specify) THE WALL AND FLOOR FINISHES – The toilet and bathroom floors shall be finished with (specify brand) ceramic tiles carrying the brand (specify brand) tiles. The walls of the toilets, bathrooms, top of kitchen cabinets, and laundry tub, and their adjacent walls shall be wainscoted with 200mm x 200mm (8”x8”) ceramic tiles. Interior and exterior corners of tiled floors and walls shall be provided with the necessary tile mouldings. All tiles for floor, walls and mouldings shall be free from laminations, serrated edges, chipped-off corners and other defects, which would adversely affect their appearance and strength. All joints between tiles and mouldings shall be filled with (specify brand) white cement and then carefully wiped. Before the tiles and mouldings are laid in place, they shall be thoroughly soaked in water if recommended by the manufacturer. Mortar to be used in setting the tiles and moldings shall be a mixture of 1 part cement and 2 parts sand by volume. LUMBER – Lumber to be used in this project shall be well seasoned, thoroughly dry and free from loose or unsound knots, shakes or other imperfections impairing their strength or appearances. The kind of lumber to be used for the various parts of the building shall be as follows: Exterior door frames --------------------------------------------- (Specify) Interior door frames --------------------------------------------- (Specify) Purlins, Wall Studs, Ceiling Joists, Cleats ------------------- (Specify) Fascia Boards, Cabinets/Closet Shelves -------------------- (Specify) Stair Treads, Stringers, Risers and Handrails -------------- (Specify) FRAMES – All wood frames for windows, doors, cabinets and closets shall be done as much as possible, with carefully fitted mortise and tenon joints. All door and window frames to be installed on concrete hollow block and other masonry walls shall be anchored with 76mm (3”) common wire nails all around the contact surfaces, And all such contact surfaces shall first be painted with (Specify brand) wood preservative before the frames are installed in place. All unexposed lumber such as posts, plates, floor and roof beams, trusses or rafters, floor joists and bridgings, purlins, cleats, ceiling joists, wall studs, etc. shall likewise be treated with (Specify brand) wood preservative after they have been installed in place. ROOFING – The roof shall be covered with (Specify brand) pre-pointed roofing sheets as shown on the plans. The roofing sheets shall be secured to the purlins with 6mmdia. (1/4” dia.) GI rivets and Gauge No. 26 plain GI straps cut long enough for bending around the specified size or purlins. The straps shall each be at least 25mm wide with corners chipped off at the riveting ends. Ridge rolls, hip rolls and valleys to be used shall be those compatible with (Specify brand) pre-pointed long-span roofing sheets. They shall lap the roofing sheets at least 250mm. The ridge rolls, hip rolls and valleys shall be riveted to the roofing sheets, in addition to the rivets engaging the GI straps in securing the roofing sheets to the purlins. All roofing sheets adjacent to concrete hollow block and other masonry walls such as at property line firewalls, shall be provided w3ith Gauge No. 26 plain GI flashing to extend up to the top and over to the other side of the wall. All rivets shall be placed at the top of the corrugations of the roofing sheets to prevent water from standing around the rivets. ELECTRICAL WORKS – The electrical installation shall be done in accordance with the approved plans and under the direct supervision and control of a licensed Professional Electrical Engineer or Master Electrician. All electric works and materials shall conform to the provisions of the latest edition of the Philippine or National Electric Code. The electrical wiring shall be installed thru (Specify brand) coilable PVC electrical conduit fittings and appurtenances that conform with ISO dimensions. The type of electrical services to be supplied to the building shall be 220V, AC, single phase. There shall be only one service drop from the nearest (Specify Electricity Company) pole to the proposed building. Electric wires for light and power shall not be smaller than 13.5mm2 (AWG No. 12). 600V insulation. Electrical materials to be used for the electric installation shall be as follows: Automatic Circuit Breaker -----------------------------(Specify) Flush wall switches, convenience outlets other wiring devices---(Specify) Wires/Conductors ----------------------------------------------- (Specify) (List other materials, if necessary) The spare circuit shall be provided with an empty PVC pipe, size 19mmø which should extend at least 300mm above the ceiling line. The grounding wires shall be identified and all wires shall be color-coded for easy identification. The panelboard shall be provided with a circuit directory. PLUMBING WORKS – All plumbing works for this project shall be in accordance with the approved plans and under the direct supervision and control of a licensed Sanitary Engineer or Master Plumber. Piping shall be properly graded or pitched to ensure easy circulation, drainage and prevent water hammer and noise. The plumbing installation shall conform with the provisions of the National Plumbing Code and the rules and regulations enforced in the locality. Piping for drain, waste and vent shall be done using (Specify brand) uPVC push-on system. For the in-house water supply installation, (Specify brand) uPVC pipes and fittings shall be used. The plumbing fixtures and accessories to be provided and installed shall be as follows: Water Closets ------------------ (Specify brand and model) Lavatories ----------------------- (Specify brand and model) Kitchen Sinks ------------------- (Specify brand and model) Shower Heads ------------------ (Specify brand and model) Soap Holder -------------------- (Specify brand) Toil Paper Holder ------------- (Specify brand) Floor Drain --------------------- Size 100mm x 100mm (4”x4”) Stainless Steel (List other materials, if necessary) Where a sanitary sewer system of sewage disposal is not in operation in the locality, a standard septic vault shall be constructed as shown in the drawings. DOORS AND DOOR FRAMES – Doors and door frames shall conform to the sizes, designs and kind of materials shown in the details of doors, schedule of doors or as per the bill of materials. All wooden doors shall be hung on at least 3 pieces of 102mm x 102mm (4” x 4”) loose-pin bearing template hinges. Door locksets to be used shall be (Specify brand) brand to be installed 1024mm from the finished floor line. Rails and rollers for the sliding doors shall be (Specify brand). STEEL WINDOWS – Steel windows to be used in this project shall conform to the size and designs shown in the detail drawings or schedule of steel windows, or as per the bill of materials. JALOUSIE WINDOWS – Jalousie windows to be installed shall conform to the detail drawings or schedule of jalousie windows, or as shown in the bill of materials. Hardwares and fittings for louver windows shall be galvanized-plated steel with rotor-operators. Glass jalousie slats shall be 5.5mm thick x 100mm wide. Use frosted glass blades for all bedroom areas and clear glass slats for all other rooms. Glass jalousie windows shall be provided with aluminum screens. Wrought iron grilles using at least 12mm square steel bars shall be installed on all jalousie windows. STORM DRAINAGE – All downspouts from the roof gutters shall end in concrete catch basins, to which 6” ø reinforced concrete drainage pipes shall be connected leading to the street gutter fronting the building. PAINTING – All painting work for this project, except as hereinafter specified, shall be done with the use of (Specify brand) paint products. The painting contractor shall supply all labor, paint materials, tools, staging and equipment necessary, and shall perform all painting and finishing work as shown in the schedule of painting and finishing work for this project. The painting contractor shall store his materials in one place in the building to be kept neat and clean, care being taken in the storage of paints, oils, etc. to prevent danger of fire. Oily rags shall be kept in metal containers and shall be removed form the building every end of the working day. Upon completion of the painting works, the painting contractor shall remove any paint spots from all finished work. He shall present his work to the Project owner or Architect/Engineer in-charge of construction, free from blemishes and rubbish generated by his workers. It shall be the painting contractor’s responsibility to protect his work and those of other contractor during the time of his work is underway. He shall be responsible for any damage to the work or property of others caused by his employees or by himself. Before any painting is done, all surfaces shall be cleaned, smoothed and freed from dust, dirt, grease, mortar, rust and other foreign substances. All parts where paint remover has been used shall be washed off with paint or lacquer thinner. All paints shall be spread evenly and carefully. All paint and paint materials shall be delivered to the building site in unbroken packages, bearing the marks of the specified brand. No adulteration of specified paints with other brands shall be allowed. ______________________ Project Owner