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9.23.11.1.(2)
ApplicationIntent
OS3OS1OP2OH4OH1OS2
ObjectiveOS1 Fire Safety
Attribution
[F20,F22-OS1.2] Applies to assemblies required to provide fire resistance.
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 assemblies are required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.
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