Sentence 9.21.4.6.(3)

  1. OS2
  2. OS1
  3. OP1
  4. OS3

Objective

OS3 Safety in Use

Attribution

Intent

Intent 1:

To limit the probability that vertical expansion of the chimney liner when heated will lead to damage or lifting of the concrete cap, which could lead to water ingress, which could lead to structural damage to the chimney due to freeze-thaw stresses, which could lead to the leakage of carbon monoxide gas into living space, which could lead to the acute poisoning or asphyxiation of persons.

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