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The maximum tension reinforcement ratio permitted in a flexural member of a ductile frame is

  • A.0.025
  • B.0.25
  • C.0.004
  • D.unlimited

Answer: A

An over-reinforced section crushes its concrete before the steel has yielded appreciably, which is a brittle failure and destroys the ductility the design assumed. Capping the ratio at two and a half per cent keeps the section under-reinforced and therefore ductile.

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