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9.9.2.4.(1)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Design in accordance with the requirements for exits of at least one door at every principal entrance to a building providing access from the exterior from ground level, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except for doors serving a single dwelling unit.
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Intent
Intent 1: 
To limit the probability that persons will be impeded in their exit path of travel should they chose to use the most familiar egress route (the principal entrance door they likely came in through) in an emergency situation, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
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