To facilitate the timely movement of persons to a safe place in an emergency.
Unobstructed width of hallways within
to which Part 9 applies [see
Sentence 220.127.116.11.(1) of Division A
for application of Part 9].
To limit the probability that an inadequate hallway width will impede egress during an emergency, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.