Exceed the limit of i25 nmm2 in the case of mild

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Unformatted text preview: eel wires and high strength deformed steel bars and wires. 5.1 General - 5.1.1 The barrel thickness shall be such that under the specified hydrostatic test pressure, the maximum tensile stress in concrete, when considered as effective to take stress along with the tensile reinforcement, shall not exceed 2 N/mm2 but the wall thickness shall be not less than those given in Tables 1 to 7 subject to 7.2(c). Cjpecification for mild steel and medium tensile steel bars and hard-drawn steel wires for concrete reinforcement: Part I Mild steel and medium tensile steel bars (third revision ). Qpecification for mild steel and medium tensile steel bars and hard-drawn steel wires for concrete reinforcement: Part 2 Hard-drawn steel wire ( third revision ). YYpecification for structural steel ( standard quality ) (fifth revisio/l ). llSpectification for mild steel wire for general engineering purposes ( third revision ). lBSpecification for hard-drawn steel wire fabric for concrete reinforcement ( secotld revision ). Wpecification for high strength deformed steel bars and wires for concrete reinforcement ( third revision I. “Code of practice for plain and’ reinforced concrete ( third revision ). ‘Method of test for splitting tensile strength of concrete cylinders. *Code of practice for plain and reinforced concrete ( third revision ). 3Methods of test for strength of concrete. ‘Specification for rubber sealing rings for gas mains, water mains and sewers. 3 IS : 458 - 1988 5.1.2 Pipes of length above 3 m and up to 4 m may be supplied by agreement between the user and the supplier and for such pipes, the quantity of reinforcement shall be modified as below: 5.2.2 The quantity and disposition of steel in pipes may be decided by mutual agreement between the purchaser and the supplier; however, it shall be proved by calculations and tests that the quality of the pipes conforms to all the requirements specified in the standard. In the absence of calculations and tests, the reinforcement given in Tables 2 to 7 shall be used as minimum reinforcement. Longitudinal reinforcement - Reinforced cement concrete pipes of lengths up to 4 m may be accepted if the longitudinal reinforcement is increased in proportion to the square of length compared with what is used for 3 m length as specified in Tables 2 to 7. 5.2.3 If so required by the purchaser, the manufacturer shall give a certificate indicating the details relating to quality, quantity and dispersion of steel in the pipes as well as the clear cover to the steel provided in the pipe. For ‘L.’(in metre) length of pipe, longitudinal reinforcement shall be g times the longitudinal 3= reinforcement used for 3 m long pipes. 5.3 Ends of Pipes - The ends of concrete pipes shall be suitable for flush ( see Fig. 1 ), collar ( see Fig. 2 ), socket and’spigot, roll on joints or confined gasket joints. Dimensions of collars shall be according to details given in Tables 1 and 2. The reinforcement for the collars shall be as...
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This document was uploaded on 10/01/2013.

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