Intent 1:
To limit the probability that the eccentric loading
of footings will lead to uneven pressure on soil beneath columns,
which could lead to soil settlement and footing and column failure.
For columns that support exterior walls or roofs, this is
to limit the probability of excessive deformation or deflection of
walls or roofs, or compromised air barrier systems, which could lead
to:
- condensation,
- precipitation ingress, 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 in interior spaces,
relative humidity, or water accumulation,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting, or
- further compromised integrity of environmental separators,
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.
Intent 2:
To direct Code users to Section 9.15. which contains requirements for footings.