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9.29.3.1.(1)
ApplicationIntent
OS2OH1OS1OP2
ObjectiveOS1 Fire Safety
Attribution
[F20,F22-OS1.2] Applies where interior finishes are required to act as fire protection for foamed plastics or to contribute to the required fire resistance of assemblies.
Application
Application 1: 
Wood furring for the attachment of interior wall and ceiling finishes, 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 inadequate strength or rigidity, which could lead to an inability to resist expected impact, gravity or lateral loads, which could lead to splitting, excessive deflection, bending failure or the withdrawal of fasteners.
This is to limit the probability of the deformation or detachment of interior finishes, which could lead to:
  • where interior finishes are required to protect foamed plastics, a loss of fire protection, or
  • where interior finishes are installed to contribute to the required fire resistance of assemblies, a loss of fire resistance.
This is to limit the probability of the growth and spread of fire, which could lead to harm to persons.
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