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9.23.2.3.(1)
OS2OP2OH1OS1OH4OS3
ObjectiveOS1 Fire Safety
Attribution
[F80-OS1.2] Applies to assemblies required to provide fire resistance.
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.
Where assemblies are required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.
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