particular specifications (road works) - CIDCO Maharashtra Ltd.

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CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 428 19.2 Materials: 19.3 Construction Steel bar reinforcement and wire shall comply with specification. The diameter of the bars shall be as shown in the working drawings. Cement concrete for R.C.C. shall comply with specification of controlled concrete. Proportion of concrete shall be as per mix design. Maximum size of coarse aggregate for R.C.C. panels and railing shall be 6mm (about ¼”) and 20mm (about ¾”) for the posts. Mixing the compacting shall be mechanical at the choice of the contractor subject to the production of concrete of uniform consistency with all coarse aggregates entirely covered with cement mortar and a dense concrete with good cast finish to the surfaces. The R.C.C. parapet shall be constructed as per detailed drawing after the centering of decking is removed. The R.C.C. parapet of the type mentioned in the item shall be built in between cast-in-situ R.C.C. posts to correct shape, dimensions and spacing specified on the drawings. The steel bar reinforcement of the posts shall be provided as specified and shown in the drawings and spliced to the bars protruding from the slab or the kerb. The concrete shall be cast to the shapes, sizes and spacings shown on drawings. The forms shall be such as to given the exact shape to the concrete members shown in the drawings or ordered by the Engineer. Cast-in-situ posts, panels and rails shall be plastered neatly with cement mortar of 1:3 mix to 5mm. (about ¼”) thickness and finished to smooth or sand face as ordered by the Engineer. Plastering shall be done immediately after and within one day of stripping the forms after roughening the concrete suitably. The plaster and concrete shall be well cured for 14 days.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 429 Precast panels shall be cast to the required design with specified reinforcement and temped and cured for 14 days. They shall originally present smooth surfaces and shall be filled into the grooves left into the kerb properly supported and grouted. Thereafter the R.C.C. post and rail will be cast. Precast top rails may also be used along with precast panels in which case only posts will be cast in situ. The cast-in-situ members shall be plastered with 1:3 cement mortar 6mm (about ¼”) thick to smooth or sand face finish, immediately after and within one day of stripping the forms after roughening and cured for 14 days. 19.4 Item to include: 1) Providing R.C.C. cast-in-situ M-35 grade posts cast-in- situ/precast concrete panels and cast-in-situ/precast rails as shown in the drawing including form work and 6mm (about ¼”) thick plaster of cement mortar of 1:3 mix for cast-in-situ members. 2) Reinforcement for precast and cast-in-situ members. 3) All labour, materials, use of equipment, tools, plant, scaffolding etc. necessary for the completion of the item satisfactorily. No separate payment shall be made for concrete and reinforcement of R.C.C. members, the rate per metre being inclusive of all the necessary materials like those mentioned above. 19.5 Mode of measurement and payment: The contract rate shall be for one metre length of the parapet completed to the shape and dimension shown on the drawings. The parapet shall be measured between the inside of the end pilasters over the abutments. Where there are only end posts, the parapet shall be measured from outside to outside of end posts. The length shall be measured correct upto two places of decimals of a metre.
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