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9.23.14.5.(1)
ApplicationIntent
OS3OP2OH4OS2
ObjectiveOS2 Structural Safety
Attribution
[F20-OS2.1]
Application
Application 1: 
Plywood, OSB, waferboard, particleboard and lumber subflooring, in wood-frame constructions to which Section 9.23.applies [see Sentence 9.23.1.1.(1) for application of Section 9.23.].
Exceptions: 
except as stated in:
  • Sentence 9.23.14.5.(2), which applies to 19 mm matched wood strip flooring, and
  • Sentence 9.23.14.5.(3), which applies to ceramic tiles applied with adhesive over a separate panel-type underlay or concrete topping.
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Intent
Intent 1: 
To limit the probability of an inappropriate grade or thickness of subflooring relative to joist spacing, which could lead to inadequate stiffness or strength, which could lead to an inability to resist expected gravity loads, which could lead to the failure of subfloors between floor joists, which could lead to persons breaking through flooring, which could lead to harm to persons.
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