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9.23.15.7.(1)
OS2OP2OH1OH4OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Minimum thickness of roof sheathing for flat roof surfaces used as walking decks, 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 an inadequate grade or thickness of sheathing relative to framing member spacing and edge support, which could lead to an inability to resist expected gravity and lateral loads, which could lead to excessive deflection, which could lead to damage to roofing or walking surfaces.
For floors and elements supporting floors, this is to limit the probability of persons tripping or falling, which could lead to harm to persons.
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