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9.23.2.3.(1)
OS2OP2OH1OS1OH4OS3
ObjectiveOS2 Structural Safety
Attribution
Application
Application 1: 
Moisture protection for untreated wood joists, beams, sill plates, columns and other members supported on concrete or masonry in contact with 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.].
Exceptions: 
except as stated in Sentence 9.23.2.3.(2), which applies where the wood is at least 150 mm above the ground.
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Intent
Intent 1: 
To limit the probability of inadequate resistance to or protection from surface water or water from the ground transferred by capillary action through masonry or concrete, which could lead to wood decay, which could lead to an inability to resist expected gravity or lateral loads.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural collapse of wood-frame construction, or
  • where framing members are part of an environmental separator, the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to further compromised structural integrity.
This is to limit the probability of harm to persons.
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