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

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

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Structural Analysis
For under water concreting.

At least 10 percent more cement is required as compared to dry conditions
All of these
The volume of coarse aggregates shall not be less than one and half times and not more than twice that of fine aggregate
De-watering by pumping is not done or until 24 hours thereafter

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