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Q: The function of sway bracing is to-
  • A. Stiffen the structure laterally
  • B. To maintain a rectangular cross section
  • C. To control the drift
  • D. All of the above
Correct Answer: Option A - The main function of sway bracing is to prevent the oscillation of the trusses under the action of live load but they also stiffen the bridge against wind and other lateral forces.
A. The main function of sway bracing is to prevent the oscillation of the trusses under the action of live load but they also stiffen the bridge against wind and other lateral forces.

Explanations:

The main function of sway bracing is to prevent the oscillation of the trusses under the action of live load but they also stiffen the bridge against wind and other lateral forces.