Intent 1:
To limit the probability of:
- the veneer being unable to support its own weight or
lateral loads,
- insufficient bonding area between ties and mortar in
loadbearing or non-loadbearing masonry cavity walls, which could lead
to an inability to resist lateral, tensile and compressive loads,
or
- insufficient bond strength between masonry veneer units
in loadbearing or non-loadbearing cavity walls, which could lead to
an inability to resist tensile stresses due to lateral loads.
This is to limit the probability of:
- compromised structural integrity of masonry construction,
- where masonry construction is part of an environmental
separator, the displacement or failure of required environmental separation
elements, which could lead to deterioration,
- in assemblies exposed to moisture or the exterior, damage
and deterioration, or
- an inability to resist expected loads, which could lead
to:
- the excessive movement or deformation 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 or doors, or
- damage to the building.
Intent 2:
To exempt masonry veneer in which the units are
not designed to provide vertical support to each other from the minimum
thickness requirement of this Sentence.