In buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]:

• glass sidelights greater than 500 mm wide that could be mistaken for doors,
• glass in storm doors,
• glass in sliding doors within or at entrances to dwelling units and in public areas, and
• entrance doors to dwelling units and in public areas, where the glass area exceeds 0.5 m² and extends to less than 900 mm from the bottom of the door [see Sentence 9.6.6.2.(3)].

This also applies in buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], with respect to glass in doors and in sidelights that could be mistaken for doors, within or at the entrance to dwelling units and in public areas, as stated in Sentence 3.3.1.19.(5).

To limit the probability that the performance of glass in sidelights and doors, with respect to strength, will fall significantly below expectations, which could lead to the glass being unable to resist accidental impact loads from people or objects, which could lead to glass breakage, which could lead to harm to persons.

To limit the probability that the performance of glass in sidelights and doors, with respect to strength, will fall significantly below expectations, which could lead to the glass being unable to resist accidental impact loads from people or objects in an emergency, which could lead to delays in the evacuation or movement of persons to a safe place in an emergency, which could lead to glass breakage, which could lead to harm to persons.