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9.23.4.2.(2)
OS2OP2OH1OH4OS1OS3
ObjectiveOS2 Structural Safety
Attribution
[F20,F22-OS2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Maximum spans, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.], for lumber floor joists that are not selected from the span tables and that are used to support floors:
  • in residential areas, or
  • where the live load on any floor does not exceed 1.9 kPa.
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Intent
Intent 1: 
To limit the probability of inappropriate design, which could lead to an inability to resist expected lateral, gravity or, for exterior floors, wind-uplift loads.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural collapse of wood-frame construction, or
  • where wood-frame construction supports or 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.
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