9.20.9.5.(1)

Objective

OH1 Indoor Conditions

Attribution

[F20,F22,F80-OH1.1,OH1.2,OH1.3]Applies to elements that support or are part of an environmental separator.

Intent

Intent 1:

To limit the probability of:

  • excessive corrosion of straps,
  • inadequate strength of straps, or
  • failure of the bond between mortar and straps under lateral loads.

This is to limit the probability of buckling or tensile failure of the straps under lateral loads, which could lead to the excessive flexing of masonry veneer, which could lead to cracking or buckling.

Where masonry units support or are part of an environmental separator, this is to limit the probability of excessive moisture transfer through mortar joints or cracked masonry.

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.

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