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9.30.2.3.(2)
ApplicationIntent
OS3OS2OH1
ObjectiveOS3 Safety in Use
Attribution
[F81-OS3.1]
Application
Application 1: 
Minimum length of nails for panel-type underlay in floors, in 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 nail withdrawal, which could lead to the deformation or movement of underlay, which could lead to the displacement or cracking of finished flooring.
This is to limit the probability of:
  • rough or uneven finished floor surfaces, which could lead to persons tripping or falling, or
  • where finished flooring is required to provide water resistance, the ingress of water into the subfloor, which could lead to compromised physical integrity of the supporting structure, which could lead to uneven finished floor surfaces, which could lead to persons tripping or falling.
This is to limit the probability of harm to persons.
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