Question

Combination of partial safety factors for loads under limit state of collapse and limit state of serviceability will be

• A. 1.5(DL + LL) or 1.5 (DL +WL) or 1.2(DL + LL) and DL + 0.8 (LL + WL)
• B. 1.5(DL + LL) and DL + 0.8 (LL + WL)
• C. 1.5(DL + LL) or 1.5 (DL +WL) or 1.2(DL + LL + WL) and 1.0(DL + LL) or 1.0 (DL + WL) or DL + 0.8 (LL + WL)
• D. 1.2 ( DL + LL + WL) and 1.0 (DL + LL) or 1.0 (DL + WL) or DL + 0.8 (LL + WL)

Answer 1

The correct option is C 1.5(DL + LL) or 1.5 (DL +WL) or 1.2(DL + LL + WL) and 1.0(DL + LL) or 1.0 (DL + WL) or DL + 0.8 (LL + WL)

As per clause 1.8.2.3.1, 36.4.1 and B 4.3

$\text{Load}\text{combinations}$	$\text{Limit}\text{of collapse}$	$\text{Limit state of}\text{serviceability}\text{(for short term}\text{effects only)}$
DL + IL	DL	IL WL	DL	IL	WL
DL + WL	1.5 _ 1.0	1.0	1.0	-
	1.5 or 0.9	1.5	1.0	-	1.0
DL + IL + WL	1.2 1.2	1.0	0.8	0.8