Structural performance of 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].

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.

To limit the probability of insufficient strength, dimensional stability and rigidity, which could lead to an inadequate resistance to expected structural loads, which could lead to excessive deflection, movement or failure of required environmental separation elements, which could lead to damage or deterioration of such 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.