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9.35.3.2.(1)
OS2OH1OP2OH4OS3
ObjectiveOH1 Indoor Conditions
Attribution
Application
Application 1: 
Depth of foundations for carports or garages connected to a dwelling unit directly or by a breezeway and serving not more than one dwelling unit, where such foundations are built in clay-type soils subject to significant movement with a change in soil moisture content, for buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of differential vertical movement of soil beneath and between the foundations of dwelling units and the foundations of structurally-attached garages or carports, which could lead to damage to foundations.
This is to limit the probability of:
  • the ingress of pollutants from the exterior, including soil gas, combustion products from parking garages, and particulates,
  • the ingress of precipitation,
  • condensation, or
  • the ingress of moisture from the ground.
This is to limit the probability of:
  • an inadequate control of the temperature of interior spaces or water accumulation,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of environmental separators or of elements protected by the 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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