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The shear centre of a thin-walled angle section lies at

  • A.Where the two leg centrelines meet
  • B.The centroid of the section
  • C.The tip of the longer leg
  • D.The midpoint of the longer leg

Answer: A

Each leg's shear flow produces a force acting along that leg's centreline, so both resultants pass through their intersection and can generate no moment about it. The same argument applies to any section built from legs meeting at a single point, such as a tee.

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