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9.9.7.1.(2)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Location and minimum number of means of egress from roofs that are intended for an occupant load of more than 60 persons, in 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 delays in the evacuation or movement of persons to a safe place in the event that one of the means of egress becomes obstructed or inaccessible in an emergency, which could lead to harm to persons.
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