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Q: The factored loads at the limit state of collapse for DL + LL, DL + WL and DL + LL + WL combinations, according to IS : 456 – 2000 are respectively
  • A. 1.5 DL + 1.5 LL, 1.2 DL + 1.2WL, 1.5 DL + 1.5 LL + WL
  • B. (0.9 or 1.5) DL + 1.5 LL, 1.5 DL + 1.5 WL, 1.2 DL + 1.2 LL + 1.2 WL
  • C. 1.2 DL + 1.2 LL, 1.5 DL + 1.5 WL, 1.5 DL + 1.5 LL + 1.5 WL
  • D. 1.5 DL + 1.5 LL, (0.9 or 1.5) DL + 1.5 WL, 1.2 DL + 1.2 LL + 1.2 WL
Correct Answer: Option D - DL + LL, DL + WL and DL + LL + WL combinations, according to IS : 456 – 2000 are 1.5 DL + 1.5 LL, (0.9 or 1.5) DL + 1.5 WL, 1.2 DL + 1.2 LL + 1.2 WL
D. DL + LL, DL + WL and DL + LL + WL combinations, according to IS : 456 – 2000 are 1.5 DL + 1.5 LL, (0.9 or 1.5) DL + 1.5 WL, 1.2 DL + 1.2 LL + 1.2 WL

Explanations:

DL + LL, DL + WL and DL + LL + WL combinations, according to IS : 456 – 2000 are 1.5 DL + 1.5 LL, (0.9 or 1.5) DL + 1.5 WL, 1.2 DL + 1.2 LL + 1.2 WL