Sentence 9.17.5.1.(1)

  1. OS2
  2. OP2
  3. OH1
  4. OH4
  5. OS3

Objective

OH1 Indoor Conditions

Attribution

[F20,F22-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 that the performance of the masonry units used, with respect to their properties and compressive strength, will fall significantly below expectations.

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.

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