Warning This information has been archived because it is outdated and no longer relevant.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

9.23.13.4.(3)
OS2OP2OH1OS1
ObjectiveOS1 Fire Safety
Attribution
[F20,F22-OS1.2] Applies to assemblies required to provide fire resistance.
Application
Application 1: 
Fastening together of lumber rafters at ridges of roofs where each half of the roof is assembled separately, such as for factory-built buildings, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.].
Top of Page
Intent
Intent 1: 
To limit the probability of the inadequate connection of rafters at ridges, which could lead to:
  • an inability to transfer expected gravity loads or positive wind loads at their upper ends, or
  • an inability to resist expected negative wind loads, which could lead to tension separation of roof peaks.
Where assemblies are required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.
Intent 2: 
To exempt situations from the application of Sentence 9.23.13.4.(2) where the roof framing on opposite sides of the peak is assembled separately.
Top of Page