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,
- where elements support or are part of an environmental
separator, the failure of required environmental separation elements,
which could lead to deterioration, or
- an inability to resist expected loads, which could lead
to:
- the excessive deflection or vibration of floors, or
- the excessive movement or deformation of walls.
This is to limit the probability of:
- compromised operation of doors or windows required for
egress in an emergency, and
- persons losing their balance, tripping or falling.
This is to limit the probability of harm to persons.