CPWD SPECIFICATION 2009 PDF
CPWD Speci Civil Vol1 - Free ebook download as PDF File .pdf), Text File .txt) CPWD Specifications, are the revised edition of existing CPWD. CPWD Specifications, are the revised edition of existing CPWD CPWD Specifications, shall be a bilingual document (Hindi version will follow). be in accordance with C.P.W.D. specifications Volume I to VI with upto Infill to frame with First Class Brickwork as per CPWD Specification / relevant BIS.
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these specifications to determine his contractual obligations for the work . be carried out strictly in accordance with CPWD specifications using. of CPWD Specifications Volume II – DSR Item No. Vertical load testing of piles in accordance with. IS (Part IV) including installation of . TECHNICAL SPECIFICATIONS Page 10 of. SUB HEAD: CARRIAGE OF MATERIALS. Please refer to CPWD Specifications Volume I – Page No.
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The specifications of bricks shall be as sub head brick work as detailed in subhead 6. CPWD specification with correction. Every page of downloaded tender shall be signed by the Agency. June Volume one of Bid documents Bricks shall confirm to C. D Specifications Vol.
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CPWD and those of appropriate list of M. State P. Manual for Specifications and Standards for Four The companies Regd Valuers and Valuation Rules Name of The upper edge of the flashing shall be laid sloping down forward and butted against the pipe and annular depression so formed shall be filled with hot bitumen.
Average thickness shall be as per clause Before laying cement concrete for grading. The slope of finished terrace shall not be more than 1 in unless a steeper slope is desired by the Engineer-in-Charge. Length and breadth shall be measured correct to a cm. The finished concrete surface shall present a smooth surface with correct slopes and uniform rounding.
On getting the level marking approved by the Site Engineer the surface should be sprinkled with thick cement slurry and the concrete should be laid carefully. The concrete should be consolidated by specially made wooden tamping.
Excess trowelling shall be avoided. In case any quantity of concrete remains unused for more than half an hour the same should be rejected and removed from the site. Occasional curing by simply spraying water now and then shall not be permitted under any circumstances. The concrete shall be rounded at the junction of roof slab and parapet. The concrete should be free from cracks. The specifications for the materials and method of preparation of concrete shall conform in general to the specification described in sub-head 4.
Area shall be worked out to nearest 0. The minimum thickness of the concrete at its junction with Khurra or parapets shall be 5 cm. The mixed cement concrete must be laid in position.
For similar areas exceeding 40 sq. The mortar surface shall be free of cracks. The rate shall include the cost of all the labour and material involved in all the operations described above. Five course treatment is a normal treatment suitable to moderate rainfall conditions less than 50 cm.
It is not at all desirable to lay the cement mortar grading for greater thickness and in that case it is advised to go in for grading with Cement Concrete. No deduction shall be made for either opening or recesses for chimney stacks. Same as specified in clause The rate shall include the cost of all the materials and labour involved in all the operations described above.
The minimum thickness of cement mortar grading at the junction with khurra or parapet wall shall be 20 mm. Curing for the grading with cement mortar shall be done exactly as described in clause The surface shall be cleaned properly with brooms bruch. Khurra for area upto 0. The average thickness shall be as shown in Fig. In selecting the combinations of layers of APP membrane.
Seven course treatment with APP modified polymeric membrane 2. The maximum thickness that shall be adopted for grading with cement mortar shall be 50 mm. The cement mortar shall be rounded at the junction of roof slab and parapet.
Same as described in clause Nothing extra shall be paid either for any extra material or labour involved in forming such opening or recess or in rounding the concrete function of roof with parapet walls. Junctions between the roof and vertical faces of parapet walls. Where proprietary brands Atactic Polyproplene modified polymeric membrane is proposed to be used by the contractor.
These shall be dressed suitably and finished smooth so as to ensure an easy and gradual turning of the flashing. In existing roof where gola and drip course are provided at the junction of roof and vertical face of parapet wall.
The penetration of the bitumen shall not be more than 40 when tested in accordance with IS TABLE Surface finish shall be measured and paid for separately. Any dismantlement or forming and finishing smooth the junction for forming the base of the flashing shall not be measured or paid for separately and shall be deemed to form part of the preparation of the surface.
The surface to be treated shall have a minimum slope of 1 to Usual width is 1. The centre core is sandwiched on both sides by high quality polymeric mix with properties of high softening point. Surface finish shall be with brick tiles of class designation grouted with cement mortar 1: It is a polymeric water proofing membrane manufactured to high standards.
Important physical and chemical parameter of the membrane shall be as given in Table Nominal size. Cement concrete where shall be 1: The membrane is available in variable thickness and weights. In the case of low dividing walls of height 30 cm. The fifth course shall be a layer of APP modified polymeric membrane.
The water treatment shall be of five or seven course as specified. For carrying over and tucking in the water proofing felts into the parapet walls. While the grading of roof surface is being done.
No deduction shall be made either for not making the groove or when the latter has already been left in the masonry by the construction agency. Such cutting of the groove and its finishing smooth shall be part of the water proofing or paid for separately. Each length of membrane shall be laid in position and rolled up for a distance of half its length. The membrane shall normally be laid in length in the direction of the slope and laying shall be commenced at the lowest level and worked up to crest.
The membrane shall not be laid in single piece of very long lengths as they are likely to shrink. When any pipe passes through the roof to be treated. In seven course treatment. The graded surface of the roof and concrete fillets and the faces of walls shall be thoroughly cleaned with wire brushed and all loose scales etc. Any crack in the roof shall be cut to V section. The roof surface shall be cleaned and dry before starting the membrane treatment. The pouring shall be so regulated that the correct weight of bonding material per unit area is spread uniformly over the surface.
The sixth course shall be a coat of bonding material and the top most seventh course shall be of specified surface finish.
Tucking in the water proofing felt will be required where the parapet wall exceeds 45 cm. The hot bonding material shall be poured on the roof across the full width of the rolled membrane as the latter is steadily rolled out and pressed down. Where the height is 45 cm. After the top flashing membrane layer has been fixed. The flashing shall consist of the same five or seven course treatment as for the roof except that the final course shall be replaced by an application of 12 mm thick cement plaster 1: The upper edge of the finishing membrane shall be well tucked into the flashing grooves in the parapet.
Where parapet walls are of height 45 cm. All overlaps shall be firmly bonded with a blow lamp and levelling down unevenness. Each strip shall overlap the preceding one by at least 7. The fourth layer of bonding material in the five course treatment shall be carried out in a similar manner after the flashing has been completed. The sixth layer of bonding material shall be carried out after the flashing is done See Fig.
Membrane shall be laid as flashing wherever junctions of vertical and horizontal surfaces occur. The overlap along the length of flashing shall stagger with those in the second layer of flashing membrane in a seven course treatment and with the joints in the roof membrane.
The lower layer of flashing membrane in a six course treatment shall overlap the roof water proofing by not less than 20 cm. The minimum overlap of the flashing membrane in five course treatment over the roofing membrane shall be 10 cm.
A typical sketch of an expansion joint with the RCC slabs on either side of the joint turned vertically up and dwarf walls by not less than 7. The top most layer shall be paid for separately. The formation of the expansion joints and provision of the cover slabs shall be the responsibility of the construction agency.
Five layered treatment 2. Where vertical pipe outlets are met with. Vertical and sloping surfaces of water proofing treatment shall also be measured under the five or seven course treatment as the case may be. The rate shall include the cost of all labour and materials involved in all the operations described above. Nothing agency extra shall be paid for the sealing of the cross joints in the cover slab with 15 cm.
Five layered 3.
Measurements shall be taken over the entire exposed area of roofing and flashing treatment including flashing over low parapet walls. In selecting thickness of membrane due consideration shall be given to the type and construction of building. It is a polymeric water proofing membrane. Bitumen primer 0. It is prefabricated five layered black finish water proofing membrane comprising of centre core of 50 gsm. Physical and chemical parameters of the membrane shall be as given in Table To ensure good adhesion between the surface and water proofing treatment suitable method to dry the surface shall be adopted.
It is available in 1 m width and variable lengths. The water proofing treatment laid on the roof surface shall overlap the upper edge of the water proofing treatment in the drain outsets by at least 10 cm.
All hair line cracks in the surface should be filled with approved sealant. The five layered water proofing membrane shall be laid using Butane torch and sealing all joints and preparing the surface complete.
The surface to be treated shall have a minimum slope of 1 in or as specified. When tested Atactic polypropylene modified black finished is proposed to be used shall conform in all respects to the specification in the preceding paras. Drain outlets shall be given same treatment as specified for the roof in the description of the item in the manner specified for the flat roof surface.
The choice of 2 mm or 3 mm membrane will depend on the type of roof i. APP water proofing membrane shall be laid as flashing wherever junction of vertical and horizontal surfaces occur.
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The upper edge of flashing membrane shall be well tucked into the flashing grooves in the parapets. The roof surface shall be cleaned and bitumen primer shall be applied in the correct quantity.
If the roof is accessible the treatment is protected by brick tiles laid over 12 mm thick cement mortar of specified grade bedding and joints sealed with cement mortar of which shall be measured and paid for separately.
All overlaps shall be firmly bonded with bitumen primer and levelled by heating the overlap with butane torch. The water proofing treatment shall be taken up the slopping junction fillets and the vertical faces of the walls to the underside of the cover slabs are given the water proofing treatment like the roof slabs. The formation of the expansion joints and provision of cover slabs shall be the responsibility of construction agency.
No extra shall be paid for the junction fillets or for the sealing of the cross joints in the cover slab with 15 cm. The APP polymer modified prefabricated water proofing membrane shall be cut to the required length.
Measurement shall be taken over the entire exposed area of roofing and flashing treatment including flashing over low parapet walls. Where parapet walls are of height 45 cm or less AP water proofing membrane flashing shall be provided in the same manner as for splashing in the core of high parapet walls except that upper edge shall be carried out the full height of the wall and taken right across the top of the parapet and down on the external vertical faces to a minimum distance of 5 cm.
A typical sketch of an expansion joint with the RCC slabs on either side of the joint turned vertically up and covered with precise RCC cover slabs as given in Fig. The formation of the junctions fillets and the water proofing treatment of the joint and cover slabs shall be carried out by the water proofing agency.
Water proofing membrane shall normally be laid in length in the direction of the slope and laying shall be commenced at the lowest level and worked upto crest. The flashing treatment shall be firmly held in the grooves and it shall be sealed with the approved sealant after terminating the membrane. APP water proofing membrane shall be laid in 6 to 8 m lengths. Each strip shall overlap the preceding one by at least 10 cm.
Geotextile gm. Length and breadth shall be measured correct to two places of decimal. Brick tiles in cement mortar or 25 mm thick cement concrete 1: The rates shall include the cost of all labour and materials involved in all the operations described above. Final layer of brick tiles or 25 mm thick cement concrete shall be measured and paid for separately.
Geotextile of the specified thickness is bonded to the water proofing membrane with intermittent touch by heating the membrane by Butane torch as per manufacturing recommendations. The rate shall include the cost of all labour and material involved in all the operation described above.
A-2 Testing A In case the material has stuck together. From each of the rolls one piece 3 m long and the full width of the felt shall be cut out for preparing test specimens. The lengths of felt so selected shall be free from abnormal defects and shall be truly representative of the whole consignment. The selected pieces of felt shall be dispatched without breakage or distortion.Fully glazed or gauzed steel -do. The minimum overlap of the flashing felt in four course specification over the roofing felt shall be 10 cm.
Whereas tendency today is to supply the consumer what he orders for by the manufacturers by simply stamping such grades on the bags. No portion of the vertical side of the trench shall remain exposed.
The Engineer-in-Charge may, however, permit hand mixing at his discretion taking into account the nature, magnitude and location of the work and practicability of the use of mechanical mixers or where item involving small quantities are to be done or if in his opinion the use of mechanical mixer is not feasible. It shall be roughly cubical in shape. Care shall be taken to avoid displacement of reinforcement or movement of form work and damage due to rains.
The rate for the concentrated chemical shall include the cost of material, containers and all the operations involved in transportation and delivery at the place specified. Fully glazed or gauzed doors, -do- 0. The number shall increase upwards.
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