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9.23.13.11.(6)
ApplicationIntent
OS2OP2OH1OS1
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.1,OS2.3,OS2.5] [F22-OS2.3,OS2.5]
Application
Application 1: 
Performance modeling of wood roof trusses that have not been designed in accordance with Part 4, 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 determination of compliance with specified strength criteria, which could lead to inadequate strength, which could lead to an inability to resist expected gravity loads, which could lead to the excessive deflection of roofs.
This is to limit the probability of compromised structural integrity, which could lead to:
  • the structural collapse of wood-frame construction,
  • where roof and ceiling framing members support required elements of environmental separators, the excessive deformation, displacement or failure of these elements, which could lead to deterioration, which could lead to further compromised structural integrity of roofs or environmental separators, or
  • where roof and ceiling framing members support assemblies exposed to the exterior, excessive water ingress, which could lead to deterioration.
This is to limit the probability of harm to persons.
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