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9.8.10.2.(1)
OS2OS3OH1
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Minimum thickness of foundation walls supporting exterior concrete steps that are cantilevered from foundation walls, 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 the excessive deflection of stairs or the failure of foundation walls at the point of stair attachment due to dead and live loads imposed by stairs and users, which could lead to:
  • persons falling,
  • persons falling in an emergency, which could lead to delays in the evacuation or movement of persons to a safe place.
This is to limit the probability of harm to persons.
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