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The effective length factor for a column with both ends pinned is

  • A.Two
  • B.Zero point seven
  • C.One
  • D.One half

Answer: C

The pinned-pinned case is the reference against which the others are quoted. Fixing both ends halves the effective length and so quadruples the critical load, while a cantilevered column doubles it and cuts the load to a quarter.

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