Warning This information has been archived because it is outdated and no longer relevant.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

9.3.2.5.(1)
ApplicationIntent
OS2OP2OS3OH1OS1OH4
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F21,F80-OP2.3,OP2.4]
Application
Application 1: 
Maximum moisture content of lumber at the time of its installation, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Top of Page
Intent
Intent 1: 
To limit the probability of the entrapment of moisture inside closed building envelopes, which could lead to:
  • excessive post-installation shrinkage and warping,
  • wood decay, which could lead to a loss of lumber strength, or
  • the exposure of other materials that are moisture-sensitive and susceptible to decay to high moisture levels and decay fungi.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure,
  • where lumber supports or is used in an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to further compromised structural integrity, or
  • an inability to resist expected loads, which could lead to
    • the excessive deformation or deflection of walls, or
    • the excessive deflection or vibration of floors.
This is to limit the probability of:
  • the space being unsuitable for its intended use,
  • compromised operation of windows and doors, and
  • damage to the building.
Top of Page