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In a building where beams are much stronger than the code requires, the column design should be

  • A.revisited, since the capacity hierarchy depends on the beam capacity
  • B.left unchanged, since extra beam strength is always conservative
  • C.reduced, since the beams now carry more of the load
  • D.unaffected, since the two are designed independently

Answer: A

The columns were proportioned for a factor times the beam capacity actually provided, so a stronger beam raises the column requirement with it. This is the point at which a well-meaning increase on site can undo the hierarchy the design established.

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