Question

For steel construction where secondary effects are considered without wind of earthquake loads, the permissible stresses on the members or connections, as specified, may be exceeded

• A. 25%
• B. 33%
• C. 33.33%
• D. 40%

Answer 1

The correct option is A 25%

As per IS 800 clause 3.9.2.2
(a) Secondary effect without wind or earthquake loads : For construction secondary effects are considered without wind or earthquake loads, the permissible stress on the member or its connected as specified may be exceeded 25%.
(b) Secondary effect combined with wind or earthquake loads : In case of wind or earthquake, permissible stresses are increased by 25% in the connection design (i.e. Rivets, bolts and tension rod) and 33.33% in case of member design.