Design of Steel Structure
A circular column section is generally not used in actual practice because

All of these
it is difficult to connect beams to the round sections
it is uneconomical
it cannot carry the load safely

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Design of Steel Structure
The sway bracing is designed to transfer

2Vi % of the top panel wind load to bottom bracing
10% of the top panel wind load to bottom bracing
50% of the top panel wind load to bottom bracing
25% of the top panel wind load to bottom bracing

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