Minimum thickness of steel work directly exposed to weather and accessible for c

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Question
Minimum thickness of steel work directly exposed to weather and accessible for cleaning and repainting, the thickness should be not less than
Options
A. 4 mm
B. 6 mm
C. 8 mm
D. 7 mm

Correct Answer

6 mm

Structural Design Specifications problems

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1. Pick up the correct statement from the following:
Options
A. Net sectional area of a tension member is its gross area less deductions for holes
B. Gross diameter of river hole is 1.5 mm in excess of its normal diameter if it is greater than 25 mm
C. Gross diameter of the rivet hole is 2.0 mm in excess of its normal diameter if it is greater than 25 mm
D. The total deduction area for the holes is obtained by the product of the thickness and sum of the diameters of the holes in any chain across the member
E. All the above.

5. Pick up the correct statement from the following:
Options
A. The effective span of a simply supported beam is clear span plus its effective depth or centre to centre of supports whichever is less
B. The effective span of a simply supported slab is clear span plus its effective depth or centre to centre of supports whichever is less
C. The effective span of a continuous beam or slab is the clear span plus its effective depth or centre to centre of supports whichever is less, provided the width of the support is less than of clear span
D. For spans with roller or rocker bearing, the effective span is the distance between the centres of bearings
E. All the above.

9. The thickness of the steel
Options
A. exposed to weather and accessible for repainting, should be not less than 6 mm
B. in main members not directly exposed to weather should not be less than 6 mm
C. in secondary members not directly exposed to weather shall be not less than 4.5 mm
D. All the above.

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