GAIL (India) Limited

36It shall be ensured that the bars are not straightened in any manner that will injure the material. Any barsincorrectly bent shall be used only if means for straightening and rebinding be such as not to affectadversely the material. Reinforcement shall not be re-bent or straightened without prior review by theConsultant. No reinforcement shall be placed in position on the works without approval of the Consultant,whether or not it is partially embedded in hardened concrete.Reinforcement steel having a reduced section, visible transverse cracks in bends, or otherwise damaged inanyway shall not be used.Spiral reinforcement shall be accurately fabricated to the diameter and pitch shown on the drawings. Oneand one half finishing turns shall be provided at both top and bottom unless shown otherwise.Cut ends of galvanized rods shall be given a protective coat of an approved zinc paint immediately aftercutting.4.6 LAPPINGAs far as possible bars of maximum length available shall be used. All bars shall be in one length unlessotherwise shown on the drawings or agreed with the Consultant/Engineer-in-charge.Laps shown on the drawings or otherwise specified by the Consultant shall be based on the used of bars ofmaximum length by the contractor. In case the Contractor wishes to use shorter bars, laps shall beprovided at the Contractor’s cost in the manner and locations approved by the Consultant /Engineer-incharge.Not more than 1/3 rd of the bars or as specified in the drawings shall be lapped at one section.Reinforcement bars shall not be welded unless shown on the drawings or instructed by the Consultant /Engineer-in-charge.4.7 PLACEMENTAll reinforcement shall be placed accurately and maintained in the position indicated on the drawings.The contractor shall provide approved type of supports for maintaining the bars in position and ensuringrequired spacing and correct cover of concrete to the reinforcement as called for in drawings. Pre-castcement concrete blocks of required shapes and size, MS. chairs and spacers bars shall be used in order toensure accurate positioning of reinforcement. Pre-cast concrete blocks shall be cast well in advance andshall be at least equal in quality to the class of concrete specified in the work.In fair faces of concrete, temporary spacers only shall be used and removed or withdrawn as compactionof concrete proceeds. Spacers will not be permitted to be left in fair faces of concrete.All intersections of the reinforcements shall be securely tied with two strands of binds wire twisted tightto make the skeleton or net work rigid so that the reinforcement is not displaced during placing ofconcrete.Tack welding of crossing bars shall not be done except as authorized or directed by the Consultant /Engineer-in-charge. Nothing extra will be paid for tack welding.The contractor shall take all responsible precautions to ensure that when handling or erectingreinforcement no damage shall be done to finished concrete Bars that are partially embedded in concreteshall not be filed bent partially embedded in concrete shall not be field bent unless concurrence has beenobtained from the Consultant / Engineer-in-charge.Walkways and borrow runs for placing and compacting the concrete shall be independent of thereinforcement.Loose binding wire and other extraneous metal shall be removed from inside the form work prior toconcrete placing.