Warning This information has been archived because it is outdated and no longer relevant.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

9.23.15.5.(1)
ApplicationIntent
OS2OP2OH1OS1
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.1,OS2.3,OS2.5] [F22-OS2.3,OS2.5]
Application
Application 1: 
Maximum width, end support and end joints for lumber roof sheathing, 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:
  • excessive width, which could lead to excessive shrinkage, which could lead to:
    • buckling or tearing of roofing, or
    • excessively wide gaps between boards, which could lead to puncturing of roofing,
  • unsupported end joints, which could lead to an inability to resist point loads from foot traffic, which could lead to differential deflection of unsupported sheathing board ends, which could lead to damage to roofing, and
  • aligned end joints, which could lead to discontinuity in the roof structure, which could lead to an inability to resist expected lateral or gravity loads, which could lead to excessive deflection, which could lead to damage to roofing.
This is to limit the probability of compromised structural integrity, which could lead to:
  • the structural collapse of wood-frame construction, or
  • precipitation ingress, which could lead to deterioration, which could lead to further compromised structural integrity of the roof.
This is to limit the probability of harm to persons.
Top of Page