9.23.14.8.(1)

Objective

OS2 Structural Safety

Attribution

Intent

Intent 1:

To limit the probability of inadequate ridge support, which could lead to an inability to resist expected gravity loads, which could lead to the lower ends of rafters or joists 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.

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

  • the structural collapse of wood-frame construction,
  • where roof and ceiling framing members support required elements of environmental separators, the excessive deformation, displacement or failure of these 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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