Intent 1:
To limit the probability of inadequate end bearing
area, which could lead to excessive localized stress, which could
lead to:
- crushing of concrete at the base of the footing (or
of wood at the top, where a column supports a wood beam), or
- shear failure of wood beams (parallel to the grain),
which could lead to the structural failure of beams.
For columns that support exterior walls or roofs, this is
to limit the probability of excessive deformation or deflection, 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.