Structural Analysis
The Castigliano's second theorem can be used to compute deflections

At the point under the load only
For beams and frames only
For any type of structure
In statically determinate structures only

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

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