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 A. Only (i) B. Both (i) and (ii) C. Both (i) and (iii) D. All (i), (ii) and (iii)

The correct answer is B. Both (i) and (ii).

Top lateral bracing prevents the sidesway buckling of the chord by providing lateral support to the chord. Sway bracing keeps the rectangular shape of the bridge cross-section by preventing the lateral movement of the top chords. Sway bracing does not transfer the load from top of end posts to bearings.

The following is a brief explanation of each option:

• Option A: Only (i) is incorrect because sway bracing also keeps the rectangular shape of the bridge cross-section.
• Option B: Both (i) and (ii) is correct because top lateral bracing prevents the sidesway buckling of the chord and sway bracing keeps the rectangular shape of the bridge cross-section.
• Option C: Both (i) and (iii) is incorrect because sway bracing does not transfer the load from top of end posts to bearings.
• Option D: All (i), (ii) and (iii) is incorrect because sway bracing does not transfer the load from top of end posts to bearings.