Dimensions 6 to1 eraces the tolerances be as shall

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Unformatted text preview: y be used for NOTE 2 - Soft grade mild collars of pipes of internal diameter UP to 150 mm only by increasing weight by a factor 140/84. NOTE 3 - Internal diameter of collar to suit the actual diameter pipes with minimum caulking space as given in co1 2. 10 of TABLE NOMIElAL INTERNAL DIAMETER OF PIPE CONCRETE DESIGN REQUIREtlENTS OF REINFORCED PIPES OF NE'3 AND NP4 CLASS (Clause 5.3) 16 COLLAR DLMEti SECN_s-, M&1 MiX Min. LenCaulking ThickSpace ness gth (2) mm. 80 13 13 13 13 13 13 16 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 100 150 200 225 250 300 350 400 450 500 600 700 800 900 1000 1100 1200 1400 1600 1800 2000 (3) mm 25 25 zz 25 25 30 35 35 35 40 40 45 50 55 60 65 75 80 90 100 110 FOR REINFORCEJl_E~~~~S r__---_ .-Nilb.<<;eL Longitudinal, SpiriiyHard or Hard-drawn Steel drawn Steel Mlfl. nos. (1) mm. COLLARS (4) mm. (51 150 15 0 150 150 150 150 150 200 200 200 200 200 200 6 6 6 6 6 6 8 8 0 6 8 8 6 200 200 200 200 200 200 200 200 NOTE 1 - Collars for sizes 2200 mm of mild steel plate of 6 mm thickness, with outside: painted. : 8 8 12 12 or 8+8 12 or 8+8 12+12 12+12 Weight (6) kg per collar 0 OB 0.08 0.08 0.08 0.08 0.08 0.11 0.15 0.15 0.15 0.15 0.23 0.23 0.23 0.33 0.33 0.33 0.50 0.67 0.67 1.00 1.00 (7) kg per collat 0.07 0.08 0.10 0.12 0.14 0.16 0.22 0.40 0.50 0.60 0.70 1.05 1.65 2.05 2.25 3.09 4.11 5.08 6.55 9.06l 12.15 13.30 and above shall be made out steel conforming to IS 226:1975 NOTE 2 - If mild steel is used for spiral reinforcement,the weight specified in co1 7 shall be increased by a factor 140/125. NOTE 3 - Soft grade mild steel collars of pipes of internal diameter ing weight by a factor 140/84.' (Page wire for spirals may be used for up to 150 mm only by increas- 20, Clause 6.2.2) - Delete and renumber 6.2.3 as 6.2.2 (Page 20, Clause 6.3.1, First sentence) Substitute the following for the first sentence: 'Pipes having barrel thickness 100 mm and ahove shall have double reinforcement cage and the amount of spiral steel in the outer cage shall be 75 percent of the mass of spiral steel in the inner cage, whilst the total shall conform to the requirements specified in the relevant tables of this standard. 1) 11 longitudinals in the outer and, inner cage The mass of cage should he the same, that is equal to half the total &ss of Ion-gitudinals specified in the relevant tables. :i 2) Insert cage with the following Clause (Page 20, following<for the last ‘Diagonal not be counted (Page (Pa&S substitute Note below ‘NOTE - It is preferable near should be located adequate clear cover: 20, Last 6.3.2, sentence: the sentence) '- Substitute C_Zause 6.3.3) - Delete in 7.2 (b) and thickness: including + 30 mm 2) Over 30 mm and 50 mm up to and up to and incl.uding m 5) Over 80 mm and 95 mm 6) Over 20, the f 4 mm % mm 4) Over 65 mm and.up 80 mm (Paw for 1m including 3) Over 50 mm and 65 mm 1: - 1) Up to and lowing the reinforcement is a process requirement and shall against longitudinal and spiral reinforcement.' ‘or socket' 20. Clause 7.2) - Delete the following for 7.2 (c): 'c) Wall ‘: clause: that single reinforcement. the inner surface of the pipe to and including i- !, mm - L!.Smm up to and includine t 6 mm -...
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This document was uploaded on 10/01/2013.

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