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9.23.2.2.(2)
OS2OP2OH1OS1OH4OS3
ObjectiveOS3 Safety in Use
Attribution
[F81-OS3.1] Applies to floors and elements that support floors.
Application
Application 1: 
Air spaces at the ends and sides of untreated wood joists, beams, columns and other wood members framed into masonry or concrete at or below the surface of the ground, 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 provision for drying, which could lead to the entrapment of surface water or water from the ground transferred through masonry or concrete, which could lead to wood decay, which could lead to an inability to resist expected gravity or lateral loads.
For floors and elements supporting floors, this is to limit the probability of:
  • compromised structural integrity, or
  • where members support or are part of an environmental separator, the displacement or failure of required environmental separation elements, which could lead to deterioration.
This is to limit the probability of excessive deflection or vibration, which could lead to persons losing their balance, tripping or falling, which could lead to harm to persons.
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