ALL REINFORCEMENT SHALL BE FREE FROM LOOSE MILL SCALES, LOOSE RUST AND COATS OF PAINTS ,OIL ,MUD OR OTHER COATINGS WHICH MAY DESTROY OR REDUCE BOND AND THE MODULUS OF ELASTICITY OF STEEL SHALL BE TAKEN AS 200 kN /SQUARE MM

ASSEMBLY OF REINFORCEMENT:-- In the case of straightening, cutting and bending, reinforcement shall be bent and fixed in accordance with the procedure specified in IS:2502-1963 and shall not be straightened in a manner that will injure the material.(2) All reinforcement shall be placed and maintained in the position shown in the Drawings approved by the competent higher authority.(3) Crossing bars should not be tack - welded for assembly of reinforcement unless permitted by the Engineer incharge.(4) As regards tolerance on placing of reinforcement, unless otherwise specified by the Engineer incharge reinforcement shall be placed with in the following tolerance.(a) For effective depth 200 mm or less plus minus ten mm and  in case of more than 200 mm it should be plus minus fifteen mm .The cover in no case shall be reduced by more than one third of the specified cover or 5mm which ever is less .(5) In case of the welded joints and mechanical connections reinforcement may be used  but in all cases of important connections,tests shall be made to prove that the joints are of the full strength of the bars connected . Welding of reinforcement shall be done in accordance with the recommendations of the IS :2751 -1966 and the Indian Standard recommendations for welding cold worked steel bars for reinforced concrete construction.(6) Where reinforcement bars are bent aside at construction joints and afterwards bent back in to their original position,care should be taken that at no time is the radius of the bend less than 4 bar dia for plain MS or 6 bar dia for deformed bars . Care shall also be taken when bending back bars , to ensure that the concrete around the bar is not damaged .