Civil Engineering MCQJE Level Civil Engineering
As per IS 456, the partial safety factor (γm) for concrete in limit state design is:
RCCRCCEASY
Choose the correct answer
A
1.0
B
1.15
C
1.5
D
2.0
Correct Answer
C. 1.5
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γm for concrete = 1.5 (IS 456 Table 1). This accounts for variability in concrete strength and the difference between cube and in-situ strength. Design compressive strength = 0.67fck/1.5 = 0.447fck ≈ 0.45fck. For steel γm = 1.15.
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