Of collars shall be according to details given in

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Unformatted text preview: given in Table 2. The ends of collar reinforcement shall have a full ring at both ends and the longitudinal reinforcement shall be proportional to the length of the collar. Dimensions of spigot and socket for unreinforced concrete pipes shall be as given in Table 8. Dimensions of spigot and socket for rubber ring roll on jointed pipes shall be as given in Tables 9 to 13. Reinforcement in socket of rubber ring jointed pipes shall be as giveu in Table 14. 5.1.3 Longitudinal reinforcement shall be provided to ensure rigidity and correct location of cages ( grids ) longitudinally and to limit the effects of transverse cracking. Minimum longitudinal reinforcement shall be as given in Table 2 to 7. 5.2 Reinforcement - The reinforcement in the reinforced concrete pipe shall extend throughout the length of the pipe and shall be so designed that it may be readily placed and maintained to designed shape and in, the proper position within the pipe mould during the manufacturing process. The circumferential and longitudinal reinforcement shall be adequate to satisfy the requirements specified under 5.1. 5.2.1 The pitch of circumferential shall be not more than the following: Nora 1 - Bends, junctions and specials for concrete pipes covered under this standard shall conform to the requirements of IS : 7322.1985l. reinforcement Nor~2- All the joints in pressure pipes shall be flexible rubber ring joints by the end of the year 1990. a) 200 mm for pipes of nominal internal diameter 80 to 150 mm, typical arrangements of reinforNOTE 3 -Some cement in socket are illustrated in Fig. 3 and 4. b) 150 mm for pipes of nominal internal diameter 200 to 350 mm, and 5.3.1 The pipe joints shall be capable of withstanding the same pressures as the pipe. c) 100 mm for pipes of nominal internal diameter 400 mm and above. NOTE- The requirement of 5.3.1 does not imply that the collar shall also be tested for the test pressure for pipes specified in 3.1, 3.2 and 9.2. The pitch shall also be not less than the maximum size of aggregate plus the diameter of the reinforcement bar used. /’ ’ ISpecification for specials for steel concrete pipes (first revision ). 4 cylinder reinforced IS : 458 - 1988 LENGTH OF JOINT NOTE- No. of Z bars : Minimum half the number of Iongitudinals. Maximum equal to number of longitudin&ls. 3A Socket Cage Connected to Barrel Cage by Means of Z Bars CAULKING SPA&’ IA ’ Internal Flush Joints [Ia30t+#-CAULKlNG SPACE 38 Socket Cage Longitudinals7Suitably Connecting to Barrel Cage Bent for (10 mm1 3C Cage Made of Continuous Longitudinals FIG. 3 TYPICAL ARRANGEMENTS OF REINFORCEMENT SOCKET FOR IN SINGLE CAGE IB External Flush Joints t = wall thickness s = 0.002 of internal a = included diameter or 2 mm, Min NOTE No. of Z bars : Minimum half the number of longitudinals. Maximum equal to number of longitudinals. 4A Socket Cage Connected angle not more than 25” to Barrel Cage by Means of Z Bars ID = internal diameter FIG. 1 DETAILS F FLUSH JOINTS O 48 rCOLLAR CE...
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