For the existing footrtote specification for steel for

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . (Page 8, Table 3, Note 1) — Delete. (Page 8, Table 3) – Insert the following new Tables after Table 3: Table 3A Design and Strength Test Requirements of Concrete Pipes of Class NP3 — Unreinforced Concrete, Medium-Duty, Non-Pressure Pipes Made by Casting Process (C/auses 4.5.1 ,5.1.1,5.3 and7.1) Internal Diameter of Pipes Barrel Wall Thickness Strength Test Requirement for Three Edge Bearing Test, Ultimate Load mm mm kN/linear metre (1) (2) (3) 15.50 300 50 16.77 350 55 400 19.16 60 450 21.56 65 23,95 500 70 600 28.74 75 700 85 33.53 800 95 38.32 900 43.11 I00 I 000 47.90 1“15 1 100 120 52.69 1200 125 57.48 1400 67.06 140 1600 165 76.64 1800 180 86.22 NOTE — Concrete for pipes shall have a minimum compressive strength of45 N/mm*at 28 days. 2 I I I Y Amendment No. 3 to IS 458:1988 Table 3B Design and Strmtgtb Test Requirements of Concrete Pipes of Class NP3 — Reinforced Concrete, Mc&am-Duty, Non-Pressure Pipes Made by Casting Process (Clauses 5.1.1, 5.1.2, Internal Diaacter &P@eJs 5.1.3, 6.3.2 and7.1) lkissforcements Wdi Ilsickoess . Lmgitudimd, Mild Steel or Hard-Drawn Steel mm mm ~ SpiralHardDrawnsteel kg/linear metre Strength Test Requirements for Three Edge Bearing Test A / Load to Produce 0.25 mm Crack kN/linear metre kN/linear metre (6) 15.50 16.77 19.16 21.56 23.95 28.74 33.53 38.32 43.11 47.90 52.69 57.48 67.06 76.64 86.22 95.80 105.40 115.00 (7) 23.25 25.16 28.74 32.34 35.93 43.11 50.30 57.48 64.67 71.85 79.00 86.22 100.60 114.96 129.33 143.70 158.07 172.44 Ultimate Load msmber (5) (4) (2) (3) (1) 1.53 8 0.78 300 50 1.58 0.78 8 350 55 1.60 0.78 400 60 8 1.90 0.78 450 65 8 2.00 70 8 0.78 500 2.20 1.18 75 8 or 6+6 6CXI 4.87 1.18 85 8 or 6+6 700 2.66 6.87 800 95 8 Of 6+6 6+6 11.55 2.66 900 100 6+6 15.70 2.66 I 000 115 19.61 6+6 2.66 1 100 120 8+8 21.25 125 3.55 1200 8+8 3.55 30.00 1400 140 8+8 3.55 50.63 i 600 165 12+12 9.36 64.19 I 800 180 12+12 9.36 83.12 2000 190 12+12 105.53 2200 9.36 210 12+12 14.88 133.30 2400 225 NOTE — Concrete for pipes shall have a mhdmum compressive strength of 35 N/mmz at 28 days. .. [Page 9, Table4,CO11, heading (see also Amendment No. 2)] : Delete the word ‘Nominal’. (Page 9, Table 4, Note 1) — Delete. (Page 9, Table 4) – Insert the following new Tables 4A and 4B after Table 4: Table 4A Design and Strength Test Requirements of Concrete Pipes of Class NP4 — Unreinforced Concrete, Heavy-Duty, Non-Pressure Pipes Made by Casting Process (Clauses 5.1.1,5.3 and 7.1) [eternal Diameter of Pipes Barrel Wall Thickness mm (1) 300 350 400 450 500 600 700 800 900 1000 1100 I 200 1400 I 600 1800 mm (2) 50 55 60 65 70 75 85 95 100 115 125 135 155 180 205 Strength Test Requirements for Three Edge Bearing Test, Ultimate Load klWlinearmetre (3) 26.4 29.8 33.9 36.9 40.0 46.3 52.2 59.3 66.3 72.6 80.4 88,3 104.2 119.6 135.3 NOTE — Concrete for pipes shall have a minimum compressive strength of 50 N/mmzat 28 days. 3 I Amendment No. 3 to IS 458:1988 Table 4B Design and Strength Test Requirements C...
View Full Document

This document was uploaded on 10/01/2013.

Ask a homework question - tutors are online