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9.12.3.3.(1)
OS2OP2OH1OS3
ObjectiveOS3 Safety in Use
Attribution
[F81-OS3.1] Applies to floors and elements that support floors.
Application
Application 1: 
Deleterious debris and boulders in backfill that is within 600 mm of foundations of 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 inappropriate backfill material, which could lead to point loads being applied to foundation walls by boulders in the backfill under lateral soil pressure, which could lead to:
  • the 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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