9.20.12.1.(2)

Intent 1:

To limit the probability of excessive eccentricity of loads, which could lead to foundation walls being unable to resist gravity loads or earth pressure from the exterior, which could lead to cracking of foundation walls and supported walls or floors.

Where exterior masonry walls support an environmental separator or act as one, 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.