Unnatti Methodology and quality procedure.pdf

Ltd iso 90012000 19 formwork shall be so constructed

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UNNATTI CONSTRUCTIONS PVT. LTD . (ISO 9001:2000) 19 Formwork shall be so constructed that vertical adjustments can be made to compensate for take up and settlements. Wedges shall be used at the top or bottom of timber shores, to facilitate vertical adjustment or dismantling of the formwork. Good quality 'Acrow' spans, steel plates, steel props shall be mobilized for the provision of smooth surface finishes. We shall indicate quantities of such formwork and associated materials on mobilizing after award of work and receipt of dregs. Fabricated structural steel sagging (as read. based on structure) and steel pipe scaffolding shall be used. DESIGN OF FORMWORK The design and engineering of the formwork such as drawings, sketch or calculations shall be submitted to the Client / Consultant Engineer for approval before proceeding with the work. The design shall take into account all the loads such as live loads, self weight, vibration loads etc. The Adjustable Steel Props with stirrups heads shall carry vertical loads and steel pipes shall be clamped for horizontal bracings. FORMWORK REQUIREMENTS Formwork shall conform to the shapes, lines, grades and dimensions including cambers of the concrete as required by design. Ample struts, walers, braces, ties, shores etc. shall be used to hold the formwork in proper position without any distortion whatsoever until the concrete has set sufficiently to permit removal. Formwork shall be strong enough to permit the use of immersion vibrators. Faces coming into contact with concrete shall be free from adhering grout, plaster, paint, projecting nails, splits or other defects. Joints shall be sufficiently tight to present loss of water, cement and fine materials from concrete.
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UNNATTI CONSTRUCTIONS PVT. LTD . (ISO 9001:2000) 20 All new and used timber shall be maintained in a good condition with respect to shape, strength, rigidity, water tightness, smoothness and cleanliness of surfaces. BRACINGS, STRUTS AND PROPS Formwork shall be braced, strutted, propped and supported so that it shall withstand the load of concrete, movement of men and materials. Formwork to beams and slabs shall be so erected that the formwork on the sides of beams and under the soffits of slabs can be removed without disturbing the beams bottoms. Vertical props shall be supported on wedges or by means of adjustable stirrups head whereby props can be gently lowered vertically while striking the formwork. For double high support either H - frame/cuplock shall be used or double staging support shall be erected. SHEAR WALL / COLUMNS - TIES Tie Rods - threaded on both sides with bolts and cone shall be used for External Shear wall / Columns of size greater than 600 mm and Tie Rods threaded on both sides with pipe sleeve shall be used for internal Shear wall /Columns of size greater than 600 mm. The Side of Shear wall / Column will be made out of Plywood or Steel Plates.
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