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9.23.11.3.(3)
ApplicationIntent
OS2OP2OH1OS1OH4OS3
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.1,OS2.5]
[F22-OS2.5]
[F20,F22-OS2.3] Applies to elements that support or are part of an environmental separator.
Application
Application 1: 
Minimum number of top wall plates in loadbearing stud walls where the studs are not more than 50 mm to one side of the supported framing above and in non-loadbearing stud walls, 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 capacity to transfer loads from supported floor and roof framing members in construction where supported loads are transferred directly to the studs or where the supported load is limited, which could lead to an inability to resist expected gravity and lateral loads, which could lead to:
  • the inadequate distribution of vertical loads to and from studs, which could lead to the excessive deflection of wall plates, or
  • inadequate diaphragm action of plates, which could lead to the excessive deflection of walls.
This is to limit the probability of compromised structural integrity, which could lead to:
  • the 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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