Question

Which of the following load combination is not possible?

(a) Dead load + imposed load + wind load

(b) Dead load + imposed load + earthquake load

(c) Dead load + wind load + earthquake load

(d) Dead load + imposed load

I got this question in a national level competition.

Question is from Determination of Wind Loads & Load Combinations in portion Structural Analysis, Loading and Load Combinations of Design of Steel Structures

Answer 1

Correct option is (c) Dead load + wind load + earthquake load

To explain I would say: According to IS code, it is assumed that  maximum wind load and earthquake load will not occur simultaneously on a structure. The following combination of loads with appropriate partial safety factors may be considered : (i)Dead load + imposed load, (ii) Dead load + imposed load + earthquake load or wind load, (iii) Dead load + wind load or earthquake load, (iv) Dead load + erection load.