Structural Analysis
The minimum horizontal distance between two parallel main reinforcing bars, is

Greatest value of the above
5 mm more than nominal maximum size of the coarse aggregate
The diameter of the longer bar if their diameters are unequal
The diameter of the bar if their diameters are same

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Structural Analysis
The effective length of lacing is the distance

0.7 of the distance between the inner end rivets of the bar for double lacing
Between the inner end rivets of the bar for single lacing
All of these
Between the inner ends of effective lengths of welds connecting the members

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

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
All of these

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