1. OH1
  2. OS2
  3. OS2
  4. OP2
  5. OH1
  6. OH4
  7. OS3


OH1 Indoor Conditions


(b) [F21-OH1.1,OH1.2,OH1.3]Applies where foundations serve as or support an environmental separator.


Intent 1:

To limit the probability of excessive lateral loading on foundation walls, which could lead to the movement or cracking of the foundation walls or building superstructures.

This is to limit the probability of:

  • excessive heat transfer,
  • pollutant ingress (from the exterior or from adjacent interior space, including soil gas, combustion products from parking garages, and particulates),
  • precipitation ingress,
  • condensation, or
  • moisture ingress from the ground.

This is to limit the probability of:

  • an inadequate control of the temperature of interior spaces, 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 supported by foundation walls.

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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