Structural Analysis
If in a rigid-jointed space frame, (6m + r) < 6j, then the frame is

Stable and statically indeterminate
Unstable
Stable and statically determinate
None of these

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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
All of these
Single I-beam or channels back with or without flange plates may be used

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