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IS 13920 requires that at a beam-column joint the sum of the column moment capacities be at least

  • A.2.8 times the sum of the beam moment capacities
  • B.1.4 times the sum of the beam moment capacities
  • C.0.7 times the sum of the beam moment capacities
  • D.equal to the sum of the beam moment capacities

Answer: B

The margin of forty per cent covers the overstrength the beams may actually develop through strain hardening and material variability. It is the numerical expression of the strong-column weak-beam principle and applies about each principal axis in turn.

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