Answer / dksharma5076@gmail.com

3.5 N/mm2

Answer / senthil473

1st class brick > 10 N/mm2
2nd class brick > 7 N/mm2
class 40 ie. heavy duty bricks > 40 N/mm2

if a pipe those configuration (ASTM c 76 class b 450mm dia 2500mm length) fixing for water course those lining of water is 7000 running meter. my question is that if 8 joints of pipe ls leakage and we have not permission to stop the water so which treatment we apply on joint in that in condition.

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