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9.24.3.1.(4)
ApplicationIntent
OH1OS2OP2OS3OS1
ObjectiveOS3 Safety in Use
Attribution
[F22-OS3.7] Applies to walls, and elements that support walls, that contain doors or windows required for emergency egress.
Application
Application 1: 
Provision, installation and fastening of runners to support the ends of studs at openings, where the studs are not full wall height, in non-loadbearing exterior and interior walls of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of inadequate means to anchor wall assemblies at openings, or inadequate means for the top and bottom attachment of cladding, sheathing or interior finish materials, which could lead to:
  • misaligned top and bottom ends of studs, or
  • the displacement of studs.
This is to limit the probability of the excessive movement or deformation of walls, which could lead to:
  • the structural failure of walls, or
  • for exterior walls, the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration.
This is to limit the probability of compromised operation of doors or windows required for egress in an emergency, which could lead to harm to persons.
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