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. 558 1.15 FORMWORK 1.15.1 Definition: 4990 - Specification for plywood for concrete shuttering work. 3696 - Safety code of scaffolds and ladders 4014 - Steel and tubular scaffoldings. 8989 - Safety code for erection of concrete framed structures. 456 - Code of practice for plain and reinforced concrete. The term “Formwork” or “Shuttering” shall include all forms, moulds, sheeting, shuttering planks, walers, poles, posts, shores, struts and strutting, ties, uprights, wallings, steel rods, bolts, wedges and all other temporary supports to the concrete during the process of setting. 1.15.2 Materials : 1.15.2.1 All facing formwork to come in contact with concrete in different elements of the structures shall be of such material and size as specified on drawings or as instructed by the Engineer. 1.15.2.2 Timber facing formwork to come in contact with concrete for “Exposed Concrete Surfaces” shall consist of lab-jointed or tongue and grooved planks as directed by the Engineer and no joints shall permit leakage of mortar at all from cast-in-situ concrete. 1.15.2.3 The materials for other backing and supporting formwork and their sizes shall be selected by the contractor and shall be subject to the approval of the Engineer.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 559 1.15.3 Design: The formwork shall be designed and constructed so that the concrete can be properly placed and thoroughly compacted to obtain the required shape, position and level subject to specified tolerances. It is the responsibility of the contractor to obtain the results required by the Engineer, whether or not some of the work is sub-contracted. Approval of the proposed formwork by the Engineer will not diminish the Contractors responsibility for the satisfactory performance of the formwork, nor for the safety and co-ordination of all operations. 1.15.4 Formwork for Exposed Concrete Surfaces: The facing formwork, unless indicated otherwise on drawings, or specifically approved by the Engineer in writing, shall generally be made with materials not less than the thickness mentioned below for different elements of the structure. 1.15.4.1 Plain slab soffits, and sides of beams, girders, joists and ribs and side of walls, fins, parapets, pardis, sub-breakers etc. shall be made with : a) Steel plates not less than 3mm thick of specified sizes stiffened with a suitable structural frame work, fabricated true to plane with a tolerance of +/- 2mm within the plate. b) Plywood plates not less than 12mm thick (IS: 4990 - Specification for plywood for Concrete Shuttering Work) or 3mm thick with a 20mm timber plank backing, of specified sizes stiffened with a suitable timber framework.
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particular specifications (road works) - CIDCO Maharashtra Ltd.

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