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UPSC Civil Service Exam Questions

Q1: Gross flange area for a riveted plate girder is to be designed considering net area as 80% of its gross area. Consider width of the flange as 500 mm while web plate as 1000 mm x 12 mm. The girder is to resist a maxi-mum BM of 4500 kNm. Maximum allowable bending stress in tension is 150 MPa. Gross flange area is

A 22000 mm2

B 35500 mm2

C 46000 mm2

D 73000 mm2

ANS:B - 35500 mm2

M = 4500*10^6=150*1000*(0.8Af+1000*12/8) or, Af=35625 mm^2 near to option B.



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