Warning This information has been archived because it is outdated and no longer relevant.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

9.20.6.1.(2)
ApplicationIntent
OH1OS2OP2OH4OS3
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.1,OS2.5]
[F22-OS2.5]
[F20,F22-OS2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Minimum thickness of above-ground, unreinforced masonry exterior walls in the bottom storeys of 2- storey buildings and the bottom 2 storeys of 3- storey buildings, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]:
  • not exceeding 11 m in height above the foundation wall,
  • in which the roof or floor system above the first storey is not of concrete construction, and
  • of more than one storey in regions where the spectral response acceleration Sa(0.2) is greater than 0.55 that are reinforced in accordance with Sentence 9.20.1.2.(1) and loadbearing masonry exterior walls of 3-storey buildings in regions where the spectral response acceleration Sa(0.2) is greater than 0.35 and less than or equal to 0.55 that are reinforced in accordance with Sentence 9.20.1.2.(2).
Exceptions: 
except as stated in:
  • Sentence 9.20.1.1.(2), which applies to buildings other than described above, or where the masonry is designed for specified loads on the basis of ultimate and serviceability limit states, and
  • Sentence 9.20.6.2.(3), which applies to cavity walls.
Top of Page
Intent
Intent 1: 
To limit the probability that masonry exterior walls will be unable to resist expected structural loads.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure of masonry construction, or
  • where masonry construction is part of an environmental separator, the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to further compromised structural integrity.
This is to limit the probability of harm to persons.
Top of Page