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3.2.7.1.(1)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Minimum average level of illumination at floor or tread level, and angles and intersections at changes of level where there are stairs or ramps, in:
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
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Intent
Intent 1: 
To limit the probability that egress routes and exits will have inadequate illumination, which could lead to safety hazards [bumping, tripping, falling, etc.], which could lead to harm to persons.
Intent 2: 
To limit the probability that egress routes and exits will have inadequate illumination, 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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