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9.23.9.8.(4)
ApplicationIntent
OS3OS1OP2OH4OS2OH1
ObjectiveOS3 Safety in Use
Attribution
[F22-OS3.1]
[F22-OS3.7] Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.
Application
Application 1: 
Support for interior loadbearing walls parallel to supporting floor joists, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.].
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Intent
Intent 1: 
To limit the probability of inadequate vertical support, which could lead to an inability to resist expected gravity loads, which could lead to the excessive movement, deformation or failure of floor assemblies.
This is to limit the probability of:
  • compromised structural integrity,
  • where elements support or are part of an environmental separator, the failure of required environmental separation elements, which could lead to deterioration, or
  • an inability to resist expected loads, which could lead to:
    • the excessive deflection or vibration of floors, or
    • the excessive movement or deformation of walls.
This is to limit the probability of:
  • compromised operation of doors or windows required for egress in an emergency, and
  • persons losing their balance, tripping or falling.
This is to limit the probability of harm to persons.
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