Q.

Which of the following load combination is not considered for design of roof trusses?

A. dead load + crane load
B. dead load + wind load
C. dead load + earthquake load
D. dead load + live load + wind load
Answer» C. dead load + earthquake load
Explanation: earthquake loads are not significant for roof trusses because of the small self weights. the following load combinations can be considered : (i) dead load + snow load, (ii) dead load + partial/full live load, (iii) dead load + live load + internal positive air pressure, (iv) dead load + live load + internal suction air pressure, (v) dead load + live load + wind load.
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