100 1 090 65 19 200 8 176 1274 406 2550 3825 4046 60 1

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Unformatted text preview: to 140/125. If mild steel is used for spiral reinforcement, the weight specified under co1 9 and 10 shall be increased NOTE 2 - Soft grade mild steel wire for spirals may be used 150 mm only, by increasing weight to 140/84. for pipes of internal diameters 80 mm, 100 mm and The longitudinal reinforcement given in this table is valid for pipes up to 2 m effective length for Nora3internal diameter of pipe up to 250 mm and up to 3 m effective length for higher diameter pipes. 7 IS:458 -1988 TABLE 3 DESIGN AND STRENGTH TEST REQUIREMENTS OF CONCRETE PIPES OF CLASS REINFORCED CONCRETE, MEDIUM-DUTY, NON-PRESSURE PIPES NP3 - ( Clauses 5.1.1, 51.2, 5.1.3, 52.2, 6.3.2 and 7.1 ) NOMMAL INIZ~~NAL BARREL WALL T~~ICKNESS ::%E A I (1) (2) Emil mm Spiral, Hard: Drawn Steel W Longitudinal, Mild Steel orsH&r,d-Drawn (3) MitZ number , STRENGTH TEST REQUIREMEINTS FOR Tmum EDQE BEARING TEST Load to Produce 0.25 mm Crack 1 (4) Ultimate (6) (5) kg/linear metre kg/linear metre kN/linear metre Load (7) kN/linear metre 80 25 6 0’33 0’15 13’00 19’50 300 25 6 0’33 0’22 13’00 19’50 150 25 6 0’33 0’46 13’70 20’55 200 30 6 0’33 0’81 14’50 21’75 225 30 6 0’33 1’03 14’80 22’20 250 30 6 0’33 1’24 15.00 22’50 300 350 40 8 0’78 23’25 8 0’78 1’80 2’95 15’50 75 16’77 25’16 400 75 8 O-78 3’30 19’16 28’74 450 75 8 0’78 3’79 21’56 32’34 SO0 75 8 0’78 4’82 23’95 35’93 600 85 6+6 1’18 7’01 28’74 43’1 l 780 85 6+6 1’18 10’27 33’53 50’30 800 95 6+6 2’66 13’04 38’32 57’48 900 100 6+6 2’66 18’30 43’11 64’67 I 000 115 6f6 2’68 21’52 47’90 71’85 1 100 I?5 6+6 2’66 27’99 52’69 79’00 f 200 ?20 8+8 3’55 33’57 57’48 86’22 1 400 135 8+8 3’55 46’21 67’06 100’60 76’64 114’96 1 600 140 8f8 3’55 65’40 1 800 150 12+12 9’36 87’10 86’22 129’33 2 000 170 12+12 9’36 97.90 95’80 143’70 2 200 185 12+12 9’36 113’30 105’38 158’07 2 400 200 12+12 14’88 146’61 114’96 172’44 2 600 215 12+12 14’88 175’76 124’54 186’83 NOTEI - The actual internal diameter is to be declared on the declared diameter ( see also 0.3.2 ). by the manufacturer and the tolerance is to be applied Nora2Minimum thickness and minimum length of collars shall be the same as that for the next available in NP2 class pipes corresponding to the calculated inner diameter of collars. higher size Nom 3 - The longitudinal reinforcement given in this table is valid for pipes up to 2 m effective internal diameter of pipe up to 250 mm and up to 3 m effective length for higher diameter pipes. length fos strength of NOTE 4 --Concrete for pipes above l 800 mm nominal diameter 35 N/mm* at 28 days and a minimum cement content of 400 kg/m*. Nora 5 - If mild steel is used for spiral reinforcement, shall have a minimum compressive the weight specified in co1 5 shall be increased 8 to 140/125. IS : 458 - 198% TABLE 4 DESIGN AND STRENGTH TEST REQUIREMENTS OF CONCRETE REINFORCED CONCRETE, HEAVY-...
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