Intent 1:
To limit the probability of excessively long spans,
which could lead to roofs being unable to support additional loads
imposed by heavier roofing materials, which could lead to excessive
movement, deformation or damage to roofing.
This
is to limit the probability of compromised structural integrity, which
could lead to:
- the structural collapse of wood-frame construction,
or
- where wood-frame construction supports or is part 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.
This is to limit the probability of:
- the space being unsuitable for its intended use,
- compromised operation of windows or doors, or
- damage to the building.