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9.12.3.3.(2)
OS2OP2OH1OS3
ObjectiveOS3 Safety in Use
Attribution
[F20-OS3.1] Applies to floors and elements that support floors.
Application
Application 1: 
Backfill for foundations of buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in Sentence 9.12.3.3.(3), which applies to foundation constructions that are not susceptible to damage from ice lensing.
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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, or
  • damage to a foundation's moisture-control elements.
For floors and elements supporting floors, this is to limit the probability of excessive deflection or damage, which could lead to rough or uneven floor surfaces, which could lead to persons tripping or falling, which could lead to harm to persons.
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