Warning This information has been archived because it is outdated and no longer relevant.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats on the "Contact Us" page.

9.21.3.8.(2)
OS1OH1OS3OP1OS2
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Clear space between chimney liners for rectangular masonry or concrete chimneys that are not more than 12 m in height and that serve fireplaces or appliances having a combined total rated heat output of 120 kW or less, and surrounding masonry, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Application 2: 
This also applies to rectangular masonry or concrete chimneys, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6], as stated in Sentence 6.3.1.2.(1).
Top of Page
Intent
Intent 1: 
To limit the probability that, on severe overheating [i.e. during a chimney fire], the expansion of the liners will put stress on the masonry surrounding the flue liners, which could lead to the failure of surrounding masonry or the displacement of liner sections, which could lead to the escape of hot gases and flame, which could lead to the ignition of combustible building components, which could lead to harm to persons.
Top of Page