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5.1.4.1.(4)
ApplicationIntent
+OS2OH1OS2OH1
ObjectiveOH1 Indoor Conditions
Attribution
(a) [F20,F21,F22-OH1.1,OH1.2,OH1.3]
Application
Application 1: 
Design for resistance to deterioration and structural loads such as:
  • the structural loads identified in Part 4,
  • air pressure loads imposed on air barrier systems,
  • wind up-lift imposed on roofing, and
  • hydrostatic pressure imposed on protection from moisture in the ground.
This applies to building materials, components, assemblies and their interfaces described in Sentence 5.1.2.1.(1) that are installed in buildings to which Part 5 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 5].
Application 2: 
This also applies to cladding assemblies installed on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] where:
  • the cladding assembly is not addressed in Section 9.27., or
  • the cladding assembly does not comply with the prescriptive requirements of Section 9.27.
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Intent
Intent 1: 
To limit the probability of using inadequate design procedures for environmental separation elements that are subject to structural loads.
This is to limit the probability of insufficient capacity and integrity of such elements to resist or accommodate such loads, which could lead to damage and deterioration of building elements, which could lead to:
  • air infiltration and exfiltration,
  • condensation,
  • precipitation ingress,
  • moisture ingress from the ground, or
  • pollutant ingress, including soil gas, combustion products from parking garages, or particulates.
This is to limit the probability of:
  • the inadequate control of temperatures of 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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