Sentence 9.21.3.3.(2)

  1. OH1
  2. OP1
  3. OS3
  4. OS1
  5. OS2

Objective

OP1 Fire Protection of the Building

Attribution

Intent

Intent 1:

To limit the probability that:

  • slight variations in liner dimensions and minor misalignments will lead to a mortar bed of less than 6 mm as required by CAN/CSA-A324-M, “Clay Flue Liners,” or
  • in the event of a chimney fire, the flue liner will fail due to high flue gas temperatures.

This is to limit the probability of the ignition of combustible building components, which could lead to damage to the building.

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