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9.23.14.5.(1)
OS3OP2OH4OS2
ObjectiveOS3 Safety in Use
Attribution
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 excessive deflection of subfloors, which could lead to an uneven walking surface, which could lead to persons tripping or falling, which could lead to harm to persons.
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