Civil Engineering MCQAE Level Civil Engineering
In Working Stress Method as per IS 456, the permissible bending compressive stress in M25 concrete is:
RCCPermissible Stresses WSMMEDIUM
Choose the correct answer
A
5 N/mm²
B
6 N/mm²
C
7 N/mm²
D
8.5 N/mm²
Correct Answer
D. 8.5 N/mm²
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IS 456:2000 Table 21 (WSM): Permissible stress in bending compression (σ_cbc) for M25 = 8.5 N/mm². For M20: 7 N/mm²; M15: 5 N/mm²; M30: 10 N/mm².
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