Design of Steel Structure
For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?

unqual legged angles with long legs back to back
equal angles back to back
both (b) or (c)
unequal legged angles with short legs back to back

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Design of Steel Structure
The elastic strain for steel is about

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

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