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9.23.13.7.(4)
OS2OP2OH1OS1
ObjectiveOS1 Fire Safety
Attribution
[F20,F22-OS1.2] Applies to assemblies required to provide fire resistance.
Application
Application 1: 
Minimum dimensions and installation of struts acting as intermediate support for lumber roof joists and rafters, 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 that struts will be unable to transfer compressive roof loads to loadbearing walls, which could lead to inadequate intermediate support for rafters or roof joists.
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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