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9.3.2.9.(3)
ApplicationIntent
OS2OP2OH1OH4OS3OS1
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F80-OP2.3,OP2.4]
Application
Application 1: 
Pressure treatment of structural wood elements with a preservative, where the structural wood elements are:
  • less than 150 mm above ground, or
  • not protected from exposure to precipitation, where the configuration is conducive to moisture accumulation and the moisture index is greater that 1.0.
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of wood decay.
This is to limit the probability of compromised structural integrity, which could lead to:
  • structural failure,
  • where structural wood elements support or are used in an environmental separator, the displacement or failure of required environmental separation elements, which could lead to the deterioration of building elements, which could lead to further compromised structural integrity, or
  • an inability to resist expected loads, which could lead to
    • the excessive deformation or deflection of walls, or
    • the excessive deflection or vibration of floors.
This is to limit the probability of:
  • the space being unsuitable for its intended use,
  • compromised operation of windows and doors, and
  • damage to the building.
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