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9.35.3.2.(2)
OS2OH1OP2OH4OS3
ObjectiveOH1 Indoor Conditions
Attribution
Application
Application 1: 
Construction joints for carports or garages attached to dwelling units directly or by a breezeway, serving not more than one dwelling unit, for buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where both the main building and the garage or carport are supported by slab-on-ground construction.
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Intent
Intent 1: 
To limit the probability that frost-related soil movement beneath the adjacent slabs-on-ground will be transmitted, which could lead to excessive stresses, which could lead to the cracking of slabs-on-ground supporting attached buildings, which could lead to an inability to support vertical building loads.
This is to limit the probability of:
  • pollutant ingress from the exterior, including soil gas, combustion products from parking garages, or particulates,
  • compromised thermal performance of components intended to provide resistance to heat transfer,
  • condensation,
  • precipitation ingress, 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, 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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