A minimum compressive strength of 35 nmm2 at 28 days

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Unformatted text preview: mm for 35 mm K + 1.75 mm for 20 mm rubber ring chord diameter and + 2.5 mm for 25 mm rubber ring chord diameter. L . (Page 16, I'?bfe 12 . the existing Note: Note 2) - Substitute the following for 'NOTE 2 - The dimensions DSZ, DS:J, LSD, TS, T, H, S, HT md K shall conform to the values given in this table as these care critical dimens ions Other dimensions are for guidance only. The following tolerances shall apply on the critical dimensjons: Diienvions To 1~‘rances Is‘?, DS3 The tolerances shall be as given below: LSP ChOlYf Diameter mm Tolerance Tolerance for DS2 for DS3 mm mm 11 12 36 20 22 25 1'andHT +2 +2 + 2.5 +3 + 3.5 +4 Tolezance for LSP mm +3 +3 + 3.5 +4 + 4.5 +5 +4 +4 +5 + 5.5 +6 +7 Same 8s that of wall thickness given in 7.2 TS and H Half the tolerance in 7.2 on wall thickness K and S The tolerances shall be as given given below: Chord Dirrmc=ter Tolerar,ce for Tolerance for K mm mm II 12 16 20 22 _t 1.25 + 1.25 + 2.00 + 2.25 + 2.75 8 s mm + 0.75 + 0.75 L 1.25 !I 1.50 + 1.50' (Page 17, Table the existing note: i;he following for 13, Note 2) - Substitute The dimensions DSZ, DS3, LSP, TS, T, H, S, HT and to the values given in this table as these are critical dimensions. Other dimensions are for guidance only. The following tolerances shall apply on the critical dimensions: 'NOTE 2 - K shall conform Dimensions Tolerances 0.52, US3 The tolerances shall be as given below: & LSP Ch0rd Diameter mm 11 HT ?L2 4 2.5 +3 + 3.5 +4 as +4 +4 +5 + 5.5 _+6 +7 +3 +3 A 3.5 +4 + 4.5 +5 that of wall thickness given in 7.2 TS and H Half the tolerance on in 7.2 K and S The toleranties shall be as Chord mm , +2 Same To.7 er.~nce for LSF' mm mm 12 16 20 22 25 T and Tolerance f0r DS3 Tolerance for US2 Diameter wall Tolerance K mm mm 11 12 16 20 + + + + 9 1.25 1.25 2.00 2.25 thickness given given below: for Tolerance S mm 2: 0.75 + 0.75 + 1.25 + 1.50' fez (Page 19, Table 14) - Insert table the following 'TABLE 15 DESIGN REQUIREtlENTS OF REINFORCED COLLARS FOR PIPES OF CLASS NP2 (Clause 5.3) NOMINAL INTERNAL DIAMETER OF PIPE 80 100 150 200 225 250 300 350 400 450 500 600 700 800 900 1000 1100 1200 1400 1600 1800 2000 22po tables after (2) mm. 13 13 13 13 13 13 16 16 16 19 19 19 19 19 19 19 19 19 19 19 19 19 19 (3) mm. CONCRETE REINFORCEMENTS Longitudinil,Mild Steel Sprial:Hardor Hard-drawn Steel drawn Steel ,COLLAR DIMENSIONS -Xl M1n MiIl Caulking ThickLenne5.5 Space gth Min. nos. (1) mm. new 14: (4) mm. (5) Weight (6) kg per collar 6 6 0.08 0.08 0.08 : 6 25 25 25 25 25 25 30 32 32 35 35 40 40 45 50 55 60 65 75 60 90 100 110 0.08 0.08 0.08 0.11 0.11 0.11 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 : 6 6 6 0 0 8 6 8 a 0 8 12 12 or 0+0 12 or 8+8 12t12 12+12 reinforcement NOTE 1 - If mild steel is used for spiral specified in co1 7 shall be increased by a factor 140/125. (7) kg per collar 0.07 0.08 0.10 0.12 0.14 0.16 0.22 0.25 0.27 0.40 0.60 0.70 1.05 1.85 2.05 2.25 3.09 4.11 5.08 6.55 9.00 12.15 13.30 the weight steel wire for spirals ma...
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This document was uploaded on 10/01/2013.

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