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Q: The rolled l-section steel beams exhibit:
  • A. a small amount of both warping and torsional rigidity
  • B. small amount of torsional rigidity only
  • C. comparable torsional and warping rigidities
  • D. small amount of warping rigidity only
Correct Answer: Option C - The rolled I–section steel beams exhibit comparable torsional and warping rigidities. Torsional rigidity 'K' = GJ Warping it is a behaviour of beams to resist torsion that results from in–plane to deformation of the cross-section.
C. The rolled I–section steel beams exhibit comparable torsional and warping rigidities. Torsional rigidity 'K' = GJ Warping it is a behaviour of beams to resist torsion that results from in–plane to deformation of the cross-section.

Explanations:

The rolled I–section steel beams exhibit comparable torsional and warping rigidities. Torsional rigidity 'K' = GJ Warping it is a behaviour of beams to resist torsion that results from in–plane to deformation of the cross-section.