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The main practical objection to base isolation in ordinary construction is

  • A.the impossibility of analysing an isolated building with any accuracy at all
  • B.the absence of any code provisions covering isolation in most countries
  • C.the inability of isolation bearings to carry ordinary vertical loading
  • D.its cost and the maintenance it requires

Answer: D

Bearings, the moat, flexible services and a lifetime of inspection all cost money that an ordinary building cannot justify. Codes cover the technique, the analysis is well established, and the bearings carry vertical load perfectly well.

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