Design of Steel Structure
The elastic strain for steel is about

1/12 of strain at the initiation of strain hardening and about 1/120 of maximum strain
1/2 of strain at the initiation of strain hardening and about 1/12 of maximum strain
1/12 of strain at the initiation of strain hardening and 1/200 of maximum strain
1/24 of strain at the initiation of strain hardening and about 1/200 of maximum strain

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

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