Intent 1:
To limit the probability that using inappropriate
design pressures will lead to the walls being unable to resist expected
lateral pressure, which could lead to the cracking of foundations
or building superstructures.
For walls serving
as an environmental separator or supporting an environmental separator,
this is to limit the probability of:
- pollutant ingress (from the exterior or from adjacent
interior space, including soil gas, combustion products from parking
garages, and particulates),
- precipitation ingress,
- condensation, or
- moisture ingress from the ground.
This is to limit the probability of:
- an inadequate control of relative humidity or water
accumulation,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting, or
- deterioration, which could lead to compromised integrity
of elements supported by foundation walls.
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.
Intent 2:
To expand the application of Section 4.2. to walls supporting drained earth that are not
constructed in accordance with Section 9.15.