For steel members exposed to weather and not accessible for repainting, the thic

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Question
For steel members exposed to weather and not accessible for repainting, the thickness of steel should not be less than
Options
A. 4.5 mm
B. 6 mm
C. 8 mm
D. 10 mm

Correct Answer

8 mm

Steel Structure Design problems

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1. 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
Options
A.
B.
C.
D.

4. Compression members composed of two channels back-to-back and separated by a small distance are connected together by riveting so that the minimum slenderness ratio of each member between the connections, does not exceed
Options
A. 40
B. 50
C. 60
D. 70

6. Long column is one
Options
A. which is more than 3 m long
B. whose lateral dimension is less than 25 cm
C. which is free at its top
D. which has a ratio of effective length and least lateral dimension more than 15.

7. For a cantilever beam of length L continuous at the support and unrestrained against torsion at the support and free at the end, the effective length l is equal to
Options
A. l = L
B. l = 2L
C. l = 0.5L
D. l = 3L
E. l = 3.5L

8. 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.

9. 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.

10. 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.

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