Warning This information has been archived because it is outdated and no longer relevant.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

9.15.3.4.(2)
ApplicationIntent
OS2OP2OH1OH4OS3
ObjectiveOH1 Indoor Conditions
Attribution
[F20,F21-OH1.1,OH1.2,OH1.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Minimum width of concrete footings for foundations or loadbearing columns, for buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] with light wood-frame walls, floors and roofs, where the span of supported joists exceeds 4.9 m and:
  • the foundations are not subject to surcharge, and
  • the specified live load on any floor supported by the footings does not exceed 2.4 kPa.
Exceptions: 
except as stated in:
  • Sentence 9.15.1.2.(1), which applies to foundations and footings for buildings erected on permafrost,
  • Sentence 9.15.3.4.(3), which applies to foundations resting on gravel, sand or silt in which the water table level is located less than the width of the footings below the bearing surface,
  • Article 9.15.3.5., which applies to adjustments to footings for exterior walls,
  • Article 9.15.3.6., which applies to adjustments to footings for interior walls, and
  • Article 9.15.3.7., which applies to adjustments to footings for columns.
Top of Page
Intent
Intent 1: 
To limit the probability of an insufficient bearing area for footings, which could lead to compressive failure and excessive settlement of underlying soil, which could lead to structural damage to the foundation and the building, which could lead to an inability to support vertical building loads or lateral earth loads.
Where elements support or are part of an environmental separator, this is to limit the probability that foundations will crack, which could lead to:
  • condensation,
  • rainwater ingress,
  • the ingress of moisture from the ground, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of temperatures of interior spaces, relative humidity, or water accumulation,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • compromised integrity of elements supported by foundations, which could lead to the deterioration of building elements.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces,
  • the inadequate thermal comfort of persons, and
  • contact with moisture.
This is to limit the probability of harm to persons.
Top of Page