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9.23.9.4.(3)
OS2OP2OH1OH4OS1OS3
ObjectiveOS2 Structural Safety
Attribution
[F20,F22-OS2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Bridging and strapping for lumber floor joists used to support floors in residential applications or where the floor live load does not exceed 1.9 kPa, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.], where:
  • panel-type ceilings are not installed,
  • the subfloor is not topped with concrete, and
  • where the vibration-controlled span is selected from Table A-1..
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Intent
Intent 1: 
To limit the probability of inadequate dimensions, proximity to supports or fastening, which could lead to inadequate restraint of the bottoms of joists, which could lead to excessive twisting of joists, which could lead to an inability to resist expected gravity and lateral loads, which could lead to the excessive movement, deformation or failure of floor assemblies.
This is to limit the probability of compromised structural integrity, which could lead to:
  • the structural collapse of wood-frame construction, or
  • for exterior floors or floors supporting environmental separators, 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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