A beam may be designed as a cased beam if section is of double open channel form

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Question
A beam may be designed as a cased beam if
Options
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.

Correct Answer

all the above.

Steel Structure Design problems

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3. If P is the allowable bending stress in a slab, whose greater and lesser projections from the column faces, are A and B, the thickness (t) of the slab base, is (where w is the intensity of earth pressure.)
Options
A.
B.
C.
D.

4. Pick up the correct statement from the following:
Options
A. The slenderness ratio of lacing bars for compression members should not exceed 145
B. The minimum width of lacing bar connected with rivets of nominal diameter 16 mm, is kept 50 mm
C. The minimum thickness of a flat lacing bar is kept equal to one-fortieth of its length between inner end rivets
D. The angle of inclination of lacing bars and the axis of the members should be between 40� and 70�
E. All the above.

5. If N is the number of rivets in the joint, the strength of a riveted joint against shearing of rivets, is given by
Options
A. P_s = N x (?/4) d² x P_s
B. P_s = N x (d x t x p_s)
C. P_s = N x (p - d) x t x P_s
D. P_s = N x (P + d) x t x p_s.
E. none of these.

6. Design of a riveted joint is based on the assumption:
Options
A. Bending stress in rivets is accounted for
B. Riveted hole is assumed to be completely filled by the rivet
C. Stress in the plate in not uniform
D. Friction between plates is taken into account
E. None of these.

9. At a road junction, 7 cross conflict points are severe if
Options
A. both are one-way roads
B. both are two-way roads
C. one is two-way road and other is one-way road
D. none of these.

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