Form Work. In general the formwork should be of marine ply xxxxx plates. Only for slab bottom the formwork of M.S. plates can be allowed on merit basis based on the condition of M.S. plates if they are suitable designed for the purpose. It will not be binding on the part of the Engineer In charge .to allows for M.
Form Work. Formworks for concrete shall be constructed from materials of sufficient strength and supported to ensure that there is no deflection when concrete in placed. The formwork shall conform to the shapes, lines and dimensions of structures shown on the drawings. Where the concrete finished surface is exposed, the formwork shall be of good quality and free of gaps. Formwork shall not be removed until the concrete has obtained sufficient strength. Normally, formwork can be removed from walls after 2 days and from beneath slabs after 2 weeks. The minimum periods between concreting and the removal of forms shall be as follows: Sides of beams, walls, columns and piles 24 hours Soffits of secondary slabs (props left in) 4 days Soffits of main slabs (props left in) 8 days Soffits of beams (props left in) 8 days Removal of props - secondary slabs 10 days Removal of props - beams and main slabs 21 days Arch centres, wedges eased 8 days Arch centres, struck 21 days The times in the above table are given as a guide and are based on average weather conditions and the use of Ordinary Cement. They may be changed if other types of cement are used, subject to the Engineer's agreement. Formwork shall be constructed so that it can be removed without undue shock or vibration and so that side shutters of members can be removed without disturbing the soffit shutters; if the contractor wishes to leave some of the props in place when the soffit shutters are removed, these props shall not be disturbed during the striking. The detailed arrangements of the props shall be submitted in advance to the Engineer. In the case of heavy loading, folding wedges shall be provided. For pre-stressed units the side shutters shall be eased as early as possible and the soffit shutters shall permit movement of the units when the pre-stress is applied. All formwork must be removed without damage to the concrete.
Form Work. Formwork shall conform to the shape, lines and dimensions of concrete and RCC structures as shown in the drawings and shall be well within the permissible tolerance. Formwork for concrete shall be of plywood, steel, good seasoned timber or other approved materials, properly designed easy for removal and cleaning. They shall be of sufficient strength and rigidity to maintain their position and shape under loads incidental to placing concrete. The number of props, their sizes and dispositions shall be such as to able safely carry the full dead load area constructional loads. The arrangement and alignment of formwork shall be got approved by the Engineer- in-charge prior to concreting. However, this shall not relieve the contractor from his responsibility for proper work and safety. Formwork shall be sufficiently tight to prevent loss of cement slurry from the concrete. All joints and holes in the formwork shall be caulked with putty jute cloth or other approved materials to the satisfaction of the Engineer-in-charge. The stripping time for the shuttering and the formwork shall in general conform to the provisions in the relevant clauses of IS 456. Unless otherwise specified rates for reinforced cement concrete shall include cost of centering, shuttering charges also.
Form Work. EPC - Exhibit B ------------------------ TENASKA GEORGIA GENERATION PROJECT Page 35 of 132 --------------------------------------------------- ------------------------ --------------------------------------------------- ------------------------ Forms shall be used wherever required to confine concrete and shape it to the required dimensions. Forms shall be of sufficient strength to withstand the pressure resulting from the placement and vibration of concrete and of sufficient rigidity to maintain required dimensions. Forms shall be constructed of either plywood or metal. The forms shall be tight to prevent leakage, straight, and without dents. Before placing either reinforcing steel or concrete, clean all form surfaces of mortar, grout and foreign material and cover the surfaces of forms with a coating (form release agents) that will prevent the absorption of moisture and prevent bonding with concrete.
Form Work a. Form work shall conform to the slope lines, curvature and dimensions of concrete and RCC structure as shown in the relevant drawings. Form work for concrete shall be plywood, steel plates, seasoned timber or other approved materials as per directions of the Engineer. It shall besufficiently tightened to prevent loss of cement slurry and all holes and joints shall be chaulked with putty. For casting R.C.C. slab polythene sheet may have to be used to prevent leakage as advised by the Engineer Incharge for which no extra payment will be made to the Contractor.
Form Work. 5.7.1 Form work shall be all as described in clause 4.11.6 and 7.15 of MES Schedule Part I.
Form Work. Irrespective of whatever is specified elsewhere and in MES Schedule, steel formwork and standard shuttering telescoping type steel props shall be used for all the works/structures included in this work. However for location like RCC fascias, chajjas etc. where use of steel from work is not feasible, PWP plywood formwork may be used subject to approval of GE. Steel formwork and steel props etc. shall be conforming to relevant IS.
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.
Form Work. 7.0.1. Form work shall be designated and constructed to shapes, lines and dimensions as ordered by Engineer – In – Charge. All forms shall be sufficiently water tight to prevent leakage of mortar. Form shall be so constructed as to removable in sections. It shall be provided for the sufficient stripping time as mentioned in M.E.S SSR Part - I (2009) Clause No. 4.11.6.3. In case of bad weather these periods may be increased on the direction of Engineer – in – Charge.
Form Work. Refer para 4.11.6.1 to 4.11.6.5 of MES schedule Part-I.
