# Civil Engineering - Steel Structure Design

### Exercise :: Steel Structure Design - Section 5

16.

Under a concentrated load, bearing stress fb in a beam, is given by (where b is the length of the bearing plate and h is the depth of the root of the fillet).

 A. B. C. D.

Explanation:

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17.

If R is the reaction on the bearing plate, the minimum moment of. inertia of the bearing stiffener provided at the support of a plate girder of overall depth D, the maximum thickness of the compression flange T, carrying total load W, is

 A. B. C. D.

Explanation:

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18.

A beam may be designed as a cased beam if

 A. section is of double open channel form with the webs not less than 40 mm apart B. overall depth and width of the steel section do not exceed 750 and 450 mm respectively. C. beam is solidly encased in concrete with 10 mm aggregate having 28 days strength 160 kg/cm2 D. width of the solid casing is kept at least 100 mm more than the width of the steel flange and having a concrete cover of 50 mm E. all the above.

Explanation:

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19.

The economical depth d of a web plate in which allowable bearing stress is fb, and the maximum bending moment is M, as suggested by Rawater and Clark, is

 A. B. C. D. E.

Explanation:

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20.

For a single section used as a tension member, the given area is assumed

 A. 20% to 30% in excess of the net area B. 30% to 40% in excess of the net area C. 40% to 50% in excess of the net area D. 50% to 60% in excess of the net area E. 60% to 70% in excess of the net area.