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9.3.2.9.(4)
ApplicationIntent
OS2OP2OH1OH4OS3OS1
ObjectiveOH4 Vibration and Deflection Limitation
Attribution
[F80-OH4] Applies to floors and elements that support floors.
Application
Application 1: 
Pressure treatment--with a preservative--of structural wood elements in retaining walls and cribbing, where:
  • the retaining wall or cribbing supports ground that is critical to the stability of building foundations, or
  • the retaining wall or cribbing is greater than 1.2 m in height.
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, or
  • where the cribbing or retaining walls support 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 compromised structural integrity.
This is to limit the probability of:
  • the excessive deformation of walls, ceilings and roofs, and
  • the deflection or vibration of floors.
This is to limit the probability of negative effects on the psychological well-being of persons.
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