Design of Steel Structure
Diameter of a bolt hole is usually taken as

nominal diameter of bolt
gross diameter of bolt
nominal diameter + 2.0 mm
nominal diameter + 1.5 mm

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Design of Steel Structure
The sway bracing is designed to transfer

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

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