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4.2.5.2.(2)
OS2OP2OP4
ObjectiveOS2 Structural Safety
Attribution
Application
Application 1: 
Placing of material, or operation of equipment in or adjacent to excavations.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A and buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A] that are required to be designed to the requirements of Part 4.
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Intent
Intent 1: 
To limit the probability that, during construction, loads placed adjacent to an excavation will not be greater than the capacity of the excavation, including its supports, which could lead to the collapse of the excavation, which could lead to harm to persons.
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