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9.29.5.9.(7)
OS2OP2OH1OS3OS1OH4OP1OP3
ObjectiveOS3 Safety in Use
Attribution
[F20-OS3.1,OS3.7] Applies where walls support floors and where interior finishes contribute to the required bracing or lateral support for studs or where interior finishes support or serve as required environmental separation elements.
Application
Application 1: 
Installation of screws in single-layer installations of gypsum board interior wall and ceiling finishes on wood furring or framing, 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 damaging the paper facing and crushing the gypsum board, which could lead to inadequate support for gypsum board, which could lead to an inability to resist expected impact, gravity or lateral loads.
This is to limit the probability of the deformation or detachment of interior finishes, which could lead to:
  • where interior finishes contribute to the required bracing or lateral support for studs, the buckling or racking of walls, which could lead to structural failure, or
  • where interior finishes support or serve as required environmental separation elements, the excessive deformation, displacement or failure of such elements, which could lead to deterioration, which could lead to further compromised structural integrity.
This is to limit the probability of excessive deflection or vibration of floors, which could lead to persons losing their balance, tripping or falling.
This is to limit the probability of harm to persons.
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