Intent 1:
To limit the probability of the failure to adjust
spans for undersized joists, rafters, lintels or beams, which could
lead to inadequate strength or rigidity, which could lead to an inability
to resist expected gravity, lateral or wind uplift loads.
This is to limit the probability of compromised structural
integrity, which could lead to:
- structural failure,
- where lumber supports or is used in an environmental
separator, the displacement or failure of required environmental separation
elements, which could lead to the deterioration of building elements,
which could lead to further compromised structural integrity, or
- an inability to resist expected loads, which could lead
to
- the excessive deformation or deflection of walls, or
- the excessive deflection or vibration of floors.
This is to limit the probability of:
- the space being unsuitable for its intended use,
- compromised operation of windows and doors, and
- damage to the building.