Intent 1:
To limit the probability of:
- inadequate width of masonry units in loadbearing contact
with each other, which could lead to an inability to resist expected
gravity or lateral loads,
- insufficient bond strength to resist tensile stresses
in non-loadbearing masonry cavity walls, or
- inadequate bonding of ties with mortar, which could
lead to inadequate pullout and pushout resistance.
Where masonry units support or are part of an environmental
separator, this is to limit the probability of deformation or cracking,
which could lead to 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.