Intent 1:
To limit the probability of excessive height or
inadequate thickness of thin portions of concrete or unit masonry
foundation walls, which could lead to inadequate strength, which could
lead to an inability to support expected vertical loads, which could
lead to structural damage to the foundation and the building.
Where elements support or are part of an environmental separator,
this is to limit the probability of cracking, which could lead to:
- condensation,
- rainwater ingress,
- the ingress of moisture from the ground, or
- compromised thermal performance of components intended
to provide resistance to heat transfer.
This is to limit the probability of:
- an inadequate control of temperatures of interior spaces,
relative humidity, or water accumulation,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting, or
- compromised integrity of elements supported by foundations,
which could lead to the deterioration of building elements.
This is to limit the probability of:
- negative effects on the air quality of indoor spaces,
- the inadequate thermal comfort of persons, and
- contact with moisture.
This is to limit the probability of harm to persons.