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The most common seismic deficiency found in Indian reinforced concrete buildings of the pre-code era is

  • A.foundations very much larger than the loads carried by the columns above them
  • B.inadequate confinement at member ends and joints
  • C.concrete of far higher strength than the design of the frame actually required
  • D.an excess of transverse reinforcement

Answer: B

Widely spaced hoops with hooks turned outwards, and joints with no transverse steel at all, are the features that most often limit performance. They are also the hardest to correct, because the reinforcement is already cast in.

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