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9.16.2.2.(1)
ApplicationIntent
OS2OP2OH1OS3
ObjectiveOH1 Indoor Conditions
Attribution
[F21-OH1.1,OH1.2,OH1.3]
Application
Application 1: 
Material that is susceptible to changes in volume due to variations in moisture content or chemical-microbiological oxidation and is used as fill supporting floors-on-ground, in 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 that moisture-content-related soil movement or the weathering of pyritic material will lead to the heaving or subsidence of floors-on-ground, which could lead to:
  • the failure of floors-on-ground, or
  • the compromised structural integrity of floors-on-ground, which could lead to the ingress of moisture from the ground, which could lead to the deterioration of building elements.
This is to limit the probability of:
  • precipitation ingress,
  • condensation, or
  • the ingress of moisture from the ground.
This is to limit the probability of:
  • an inadequate control of 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 compromised integrity of elements protected by floors-on-ground.
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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