Intent 1:
To limit the probability of:
- lintels that are inadequate in size or have an excessive
span, which could lead to the excessive deflection or failure of lintels,
which could lead to the cracking or structural failure of masonry
veneer over openings, or
- an inadequate bearing area between lintels and supported
masonry veneer, which could lead to shear or compression failure of
masonry veneer.
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.