Design of Steel Structure
Study the following statements. i) Top lateral bracing prevents the sidesway buckling of the chord. ii) Sway bracing keeps the rectangular shape of the bridge cross-section. iii) Sway bracing transfers the load from top of end posts to bearings. The correct answer is

all (i), (ii) and (iii)
both (i) and (iii)
only (i)
both (i) and (ii)

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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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