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9.23.11.1.(2)
OS3OS1OP2OH4OH1OS2
ObjectiveOS3 Safety in Use
Attribution
[F22-OS3.1] Applies to floors and elements that support floors.
[F22-OS3.7] Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.
Application
Application 1: 
Minimum thickness of bottom wall plates, in wood-frame constructions to which Section 9.23. applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.]:
  • where wall studs are located directly over framing members, or
  • in non-loadbearing walls.
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Intent
Intent 1: 
To limit the probability of inadequate thickness of bottom wall plates in walls where stud loads are limited or are transferred directly to other supporting members, 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 or failure of wall plates,
  • inadequate diaphragm action of plates, which could lead to the excessive deflection of walls, or
  • inadequate lateral support for the ends of studs.
Where walls support floors, this is to limit the probability of:
  • the excessive deformation of floors, which could lead to compromised operation of doors required for egress in an emergency, and
  • excessive deflection or vibration of floors, which could lead to persons losing their balance, tripping or falling.
This is to limit the probability of harm to persons.
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