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9.7.5.3.(1)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Protection for windows over stairs, ramps and landings that extend to less than 1 070 mm above the surface of the treads, ramp or landing, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in Sentence 9.7.5.3.(2), which applies to protection for windows over stairs, ramps and landings that extend to less than 900 mm above the surface of the treads, ramp or landing.
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Intent
Intent 1: 
To limit the probability of inadequate protection under conditions of crowding in stairs, ramps or landings or for other reasons, which could lead to persons -- who are pushed or who lose their balance -- falling against windows, which could lead to harm to persons.
Intent 2: 
To limit the probability of inadequate protection under conditions of crowding in stairs, ramps or landings or for other reasons in an emergency, which could lead to persons--who are pushed or who lose their balance--falling against windows, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
Intent 3: 
To expand the application of Subsection 9.8.8. to include certain windows in stairs, ramps or landings.
Intent 4: 
To expand the application of the guard loading requirements in Part 4 [more specifically Article 4.1.5.15.] to certain windows covered in Part 9.
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