Design of Steel Structure
According to IS Specifications, the maximum pitch of rivets in compression is (where t is thickness of thinnest outside plate or angle)

lesser of 300 mm and 32 t
lesser of 200 mm and 161
lesser of 3 00 mm and 24 t
lesser of 200 mm and 12 t

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Design of Steel Structure
The bracing between two columns of a steel tank will be designed to resist

column loads + 2.5% of horizontal shear due to wind or earthquake
horizontal shear due to wind or earthquake only
column loads + full horizontal shear due to wind or earthquake
horizontal, shear due to wind or earthquake + 2.5% of column loads

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