9.23.14.8.(7)

Objective

OS2 Structural Safety

Attribution

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.

This is to limit the probability of compromised structural integrity, which could lead to:

  • the structural collapse of wood-frame construction,
  • where supporting walls serve as an environmental separator or where roof and ceiling framing members support elements of an environmental separator, the excessive deformation, displacement or failure of required environmental separation elements, which could lead to deterioration, which could lead to further compromised structural integrity of roofs or environmental separators, or
  • where roof and ceiling framing members support assemblies exposed to the exterior, excessive water ingress, which could lead to deterioration.

This is to limit the probability of harm to persons.

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