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.