9.23.14.8.(7)

Objective

OS1 Fire Safety

Attribution

[F20,F22-OS1.2]Applies to assemblies required to provide fire resistance.

Intent

Intent 1:

To limit the probability of the inadequate splicing of ceiling joists, which could lead to ceiling joist splices being unable to resist the tension forces imposed by expected gravity and lateral loads on rafters, which could lead to the lower end of rafters moving outward, which could lead to:

  • the failure of roof rafters or joists, or supporting walls, or
  • the excessive deflection of roof rafters or joists, which could lead to damage to roofing.

Where assemblies are required to provide fire resistance, this is to limit the probability of compromised fire resistance of the assembly, which could lead to harm to persons.

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