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9.12.3.3.(3)
ApplicationIntent
OS2OP2OH1OS3
ObjectiveOP2 Structural Sufficiency of the Building
Attribution
[F20-OP2.1,OP2.3]
Application
Application 1: 
Backfill for foundations, where foundation walls are:
  • cast-in-place concrete,
  • concrete block insulated on the exterior, or
  • concrete block protected from the backfill by a separation layer.
This applies to 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 excessive lateral loading on foundation walls or jacking pressures from adfreezing to foundation walls, which could lead to movement or cracking of foundation walls.
This is to limit the probability of:
  • compromised structural integrity of the foundation or of supported elements, or
  • where foundation walls act as or support environmental separators, compromised environmental separation elements, which could lead to
    • condensation,
    • rainwater ingress, or
    • the ingress of moisture from the ground.
This is to limit the probability of the deterioration of protected or supported elements, which could lead to compromised structural integrity, which could lead to damage to the building.
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