Structural Analysis
For heavily reinforced concrete member, the nominal maximum size of the aggregates should be restricted to

5 mm less than the minimum cover to the reinforcement
Greater of A and B
5 mm less than the minimum clear distance between the main bars
Smaller of A and B

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Structural Analysis
Pick up the correct statement applicable to cased columns.

The surface and edges of the steel column should be provided a concrete cover not less than 50 mm
All of these
Single I-beam or channels back with or without flange plates may be used
Single I-beam or channels back with or without flange plates may be used

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