Intent 1:
To limit the probability that masonry adjacent to
chases or recesses will be unable to resist concentrated vertical
loads or to transfer horizontal loads to supporting elements, which
could lead to cracking.
Where masonry units support
or are part of an environmental separator, this is to limit the probability
of the excessive deformation, displacement or failure of required
environmental separation elements.
This is to limit the probability of:
- condensation,
- precipitation ingress,
- moisture ingress,
- excessive heat transfer,
- pollutant ingress, or
- compromised thermal performance of components intended
to resist heat transfer.
This is to limit the probability of:
- an inadequate control of temperatures in interior spaces,
drafts, 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 further compromised
integrity of environmental separators.
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.