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9.23.3.4.(2)
ApplicationIntent
OS2OP2OH1OS1OH4OS3
ObjectiveOH1 Indoor Conditions
Attribution
[F20,F22-OH1.1,OH1.2,OH1.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Fastening of lumber exterior-wall framing to lumber floor framing, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.], where the sole plate is not fastened to the floor joists or blocking with nails at least 82 mm long spaced not more than 400 mm o.c.
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Intent
Intent 1: 
To limit the probability of inadequate fastening or an excessive rate of deterioration of fasteners, which could lead to an inability to resist expected wind loads, which could lead to the separation of exterior walls or wall elements from floors, which could lead to overturning, lifting or sliding of exterior walls.
Where wood-frame construction supports or is part of an environmental separator, this is to limit the probability of the displacement or failure of required environmental separation elements, which could lead to:
  • condensation,
  • precipitation ingress,
  • excessive heat transfer,
  • pollutant ingress, or
  • compromised thermal performance of components intended to resist heat transfer.
This is to limit the probability of:
  • inadequate control of temperatures of interior spaces, drafts, relative humidity or water accumulation,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to further compromised integrity of environmental separators.
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.
Intent 2: 
To exempt situations from the application of Sentence 9.23.3.4.(1) where another means of fastening the wall framing to the floor framing is provided.
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