In the following clauses shall also apply for collars

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Unformatted text preview: in Sl No 1 of co1 (5) 3) Substitute‘6 or 6+6* for‘6+6- in Sl No 12, 13 and 14 of co1 (3) 4) Substitute ‘2.5 m. for ‘2 m' in Note 3 !>IDelete Note 2 and renumber the subsequent Notes. 6) Delete ‘and a minimum cement content of 400 kg/ma' from Note 4. 3 7) Insert the following new Note: ‘NOTE - Total mass of longitudinal reinforcement shall be calculated by multiplying the values given in co1 4 by the length of the pipe and then deducting for the cover length provided at the two ends .’ (I&E 9, Table 4) - Insertthe following as Table 4: 'TABLE 4 : DESIGN AND STRENGTH TEST RRQUIRRMBNTSOF CONCRETE PIPES OF CLASS NP4 - RRINPORCED CONCRETE, HEAVY-DUTY, NON-PRRSSUREPIPES (Clauses 5.1.1. 5.1.2 6.1.3. 5.2.2. 6.3.2, and 7.1) NOMINAL INTERNAL DIAMETER OF PIPES (1) BARREL WALL THICKNESS (2) mm mm 60 25 25 25 30 30 30 40 75 75 100 150 200 225 250 300 350 400 450 500 600 700 800 900 1000 1100 1200 1400 1600 1800 2000 2200 2400 2600 ;"s 05 85 95 100 115 115 120 135 140 150 170 185 200 215 REINFORCEMENTSl SPiral* Lonaitludinal. HerdMild steel or drawn Hard-Drawn Steel Steel STRENGTH TEST REQUIREMENTS FOR THREE EDGE BEARING TEST Loab to Ultiimate Produce Load 0.25 mm Crack (7) (5) (6) (31 (4) kN/linear kN/linear kg/linear kg/linear Mfn metre metre Number metre metre 22.1 33.15 6 0.59 0.24 0.59 0.36 22.1 33.15 6 23.3 34.95 0.59 0.74 6 24.8 36.9 0.59 1.30 6 25.2 37.8 0.59 1.64 1.96 25.5 36.25 66 0.59 26.4 39.6 8 0.78 2.71 8 29.8 44.7 0.76 3.14 3.52 33.9 50.9 0.76 : 36.9 55.3 0.78 3.68 40.0 61.2 8 0.78 5.96 46.3 69.4 8 or 6+6 2.34 9.83 8 or 6+6 3.44 14.33 52.2 78.3 59.3 89.1 8 or 6+6 3.44 21.20 66.3 6+6 3.44 27.13 99.4 35.48 8+6 7216 108.9 6.04 6+6 6.04 43.76 80.4 120.6 6+6 6.04 53.07 86.3 132.4 Et8 9.36 77.62 104.2 156.4 12+12 106.97 9.36 119.6 179.5 12+12 14.88 150.22 135.3 203.0 12+12 14.88 151.79 135.3 203.0 12+12 14.88 160.90 142.2 213.3 12+12 14.88 216.96 155.0 232.5 12t12 14.88 258.93 166.7 250.0 NOTE 1 - The actual internal diameter is to be declared by the manufacturer and tolerance is to be applied on the declared diameter (see also 0.3.2) NOTE 2 - The longitudinal reinforcementgiven in this table is valid for pipes up to 2.5 m effective length for internal dla of pipe up to 250 mm and 3 m effective length for higher diameter pipes. MOTE 3 - Concrete for pipes above 1800 mm nominal diameter shall have a minimum compressive strength of 35 N/mm2 at 28 days. G * c --_~--~ NOTE 4 specified If mild steel is used for spiral reinforcement in ~01 5 shall be increased by a factor 1401125. - the weight NOTE 5 - Total mass of longitudinal reinforcement shall he calculin ~01 4 by the length of the the values given ated by multiplying pipe and then deducting for the cover length provided at the two ends.' (Page 9, TLTble 5) - 1) Substitute ‘0.59' for ‘0.33' in co1 2) Substitute '0.16' for ‘0.15' in Sl No 1 of co1 3) Substitute '2.5 m' for 4) Insert following the ‘2 m' in Note new (4) (5) 4 Note: ‘NOTE - Total mass of longitudinal reinfo...
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This document was uploaded on 10/01/2013.

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