Common use of Form Work Clause in Contracts

Form Work. 7.1 The formwork shall be rigid and so constructed as to retain the shape and dimensions of the memberbeing cast. It shall have sufficient strength and rigidity to withstand the load of concrete, vibrations, movementof men, materials and plants and any other incidental loads without excessive deflection beyond permissiblelimits. Before concreting is started, the props and wedges shall be thoroughly checked to see that these areintact, and are not loose. While concreting is in progress, a constant watch shall be kept on the props andimmediate remedial measures taken as soon as any of these gets loosened. Care shall be taken that props andwedges do not get loose for the minimum period specified for the removal of formwork. 7.2 All propping and centering should be either of steel tubes with extension or built up sections of rolled steels. 7.3 Staging should be as designed with required extension pieces as approved by EIC to ensure properslopes, as per design for slabs/beams etc and as per levels as shown in drawings. All the staging shall be eitherof tubular steel structure with adequate bracings as approved or made of built up structural sections fromstructural steel ▇▇▇▇▇▇▇▇.▇▇ case of structures with two or more floors, the weight of concrete, centering and shuttering of anyupper floor being cast shall be suitably supported on one floor below the top most floor already cast.Form work and concreting of upper floor shall not be done until concrete of lower floor has set atleast for 14 days. 7.4 Shuttering used shall be of sufficient stiffness to avoid excessive deflection and joints shall be tightlybutted to avoid leakage of slurry. If required, rubberized lining of materials as approved by the EIC shall beprovided in joints.Steel shuttering used for concreting should be sufficiently stiffened. The steel shuttering should alsobe properly repaired before use and properly cleaned to avoid stains, honey combing, seepage of slurrythrough joints etc. 7.5 Form work shall be of steel. In case of any deviation involving form work, the pricing shall be done on the basis of timber form work. 7.6 Forms shall be removed gently. They shall be eased carefully in order to prevent the load beingsuddenly transferred to concrete. The minimum period that shall elapse after the concrete has been laid andbefore form work is eased and removed is given in section-4: Concrete, for ordinary Portland cement.

Form Work. 7.1 The formwork (a) Form work shall be rigid comply with requirements of clause 4.11.6 and so constructed as to retain the shape and dimensions clause 7.15 of the memberbeing cast. It shall have sufficient strength and rigidity to withstand the load of concrete, vibrations, movementof men, materials and plants and any other incidental loads without excessive deflection beyond permissiblelimits. Before concreting is started, the props and wedges shall be thoroughly checked to see that these areintact, and are not loose. While concreting is in progress, a constant watch shall be kept on the props andimmediate remedial measures taken as soon as any of these gets loosened. Care shall be taken that props andwedges do not get loose for the minimum period specified for the removal of formworkMES Schedule. 7.2 All propping and centering should be either of steel tubes with extension or built up sections of rolled steels. 7.3 Staging should be as designed with required extension pieces as approved by EIC to ensure properslopes, as per design for slabs/beams etc and as per levels as shown in drawings. All the staging shall be eitherof tubular steel structure with adequate bracings as approved or made of built up structural sections fromstructural steel ▇▇▇▇▇▇▇▇.▇▇ case of structures with two or more floors, the weight of concrete, centering and shuttering of anyupper floor being cast shall be suitably supported on one floor below the top most floor already cast.Form work and concreting of upper floor shall not be done until concrete of lower floor has set atleast for 14 days. 7.4 Shuttering used (b) Props shall be of sufficient stiffness to avoid excessive deflection steel of adequate length and joints strength. Formwork using steel props depending upon the provisions in the contract shall be tightlybutted to avoid leakage of slurry. If required, rubberized lining of materials as designed by the Contractor’s site engineer and approved by the EIC shall beprovided GE keeping in joints.Steel shuttering used for concreting should view the following guidelines: (i) Deadweight of concrete and steel (ii) Load carrying capacity of the props (iii) Sequence and schedule of concrete pours (iv) Number of vibrators to be sufficiently stiffened. The steel shuttering should alsobe properly repaired before use and properly cleaned to avoid stains, honey combing, seepage of slurrythrough joints etc.put in service 7.5 (v) Any other criteria as considered necessary by the GE (c) Form work shall be of steelsteel of adequate strength. However deformed steel sheet shall not be used or permitted for use as formwork. (d) Props should be straight and placed in true vertical position. Vertical props should be provided with braces in both directions. Number of vertical intervals at which braces are to be provided, shall be as decided and approved by the GE, depending upon the height of the structure and horizontal loading. Bracings and supports shall be of steel and shall be adequately tied / welded to form firm joints. (e) Moving loads in the form of workers on the top of the form work should be minimized by pumping the concrete and restricting the number of workers. The impact and horizontal loads due to movement of workers should be minimized by keeping them stationery and just moving concrete containers from one person to other up to the place of pouring. It should be ensured that sub base of the floor is completed and cured after consolidating the earth underneath so that it gives firm base to the props. Vertical props should be provided with braces in both directions. Number of vertical intervals at which braces are to be provided, shall depend upon height of the structure and horizontal loading. (f) Safety of the workmen and structure shall be ensured by thorough checks that scaffolds are safe, the spacing of verticals, horizontals and braces are carefully designed, making safe access arrangement, preferring steel scaffolds to wooden scaffolds, no bamboo scaffolds shall be used, taking adequate measures against fire, use of safety helmets and safety belts, providing sufficient illumination of work area if work is in progress at night, special attention of female workforce for loose garments, etc. The decision of the GE in this regard shall be final and binding. (g) In case of any deviation involving form work, work the pricing shall be done on at the basis rates of timber form workformwork for fair finished surface. 7.6 Forms shall be removed gently. They shall be eased carefully in order to prevent the load beingsuddenly transferred to concrete. The minimum period that shall elapse after the concrete has been laid andbefore form work is eased and removed is given in section-4: Concrete, for ordinary Portland cement.