Intent 1:
To limit the probability that inappropriate grades
of visually graded lumber will be used, which could lead to compromised
structural integrity of the visually graded lumber or of elements
supported by the visually graded lumber, which could lead to excessive
movement, deformation or failure under expected lateral, gravity 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.