alleryStart learning →In limit state design (LSD), partial safety factor for concrete is:
ANo factor
B2.0
C1.0
D1.5 (vs 1.15 for steel)
Answer & Solution
Correct answer: D. 1.5 (vs 1.15 for steel)
LSD partial safety factors (IS 456 / IS 800): for concrete γ_m = 1.5 (more variable, less reliable).
For steel γ_s = 1.15 (manufactured, more uniform).
**Load factors:** dead load 1.5, live load 1.5. Hence design strengths: f_cd = 0.67 f_ck / 1.5; f_yd = f_y/1.15.
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