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Discussion

Deciding between retrofit and demolition turns principally on

  • A.the number of storeys the building has above its ground floor level
  • B.the seismic zone in which the building happens to be situated
  • C.the cost of each against the value retained
  • D.the age of the building expressed in years since its original construction

Answer: C

Where strengthening approaches the cost of rebuilding, and where no heritage or occupancy value argues otherwise, replacement wins. Heritage fabric, a functioning tenancy or a difficult site all shift the balance towards retrofit.

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