ARCHIVED - 3.4.6.7.(6)

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3.4.6.7.(6)

Application

Intent

OS3


Objective	OS3 Safety in Use
Attribution	[F30-OS3.1]
Application	Application 1: Leading edge of stair treads covered with resilient material. This applies--in buildings described in Sentence 1.3.3.2.(1) of Division A--to: interior and exterior exits, as stated in Appendix Note A-3.4.6., and exits serving floor areas that are intended for occupancy, including mezzanines as stated in Sentence 3.4.2.2.(1). Application 2: This also applies to: stairways used by the public as access to exits, as stated in Appendix Note A-3.4.6., tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1), stairs in a means of egress from a roof, where a roof is used or intended for an occupant load more than 60, as stated in Sentence 3.3.1.3.(4), and stairways, as stated in Sentence 3.3.1.14.(1). Exceptions: except as stated in: Sentence 3.1.6.2.(1), which prohibits air-supported structures to be located above the first storey on any building, Sentence 3.1.6.2.(2), which prohibits air-supported structures to be used for classrooms or for Groups B, C, or Group F, Division 1 major occupancies, Sentence 3.1.6.2.(3), which requires air-supported structures to be designed as open floor spaces without interior walls, mezzanines, intermediate floors or similar construction, Sentence 3.3.1.3.(5), which applies to rooftop enclosures, Sentence 3.3.1.14.(2), which applies to service rooms, service spaces and industrial occupancies, Subsection 3.3.2., which applies to assembly occupancies, Sentence 3.3.4.7.(1), which applies to dwelling units, Sentence 3.4.2.2.(2), which applies to mezzanines that: are not required to terminate at a vertical fire separation [see Article 3.2.8.1.], are not intended for an occupant load more than 60, do not exceed the area limits for rooms and suites in Table 3.4.2.2., and have limited travel distances to egress doors or stairs, Sentence 3.4.2.2.(3), which applies to at least half of the required means of egress from a mezzanine if the mezzanine is not required to terminate at a fire separation as permitted by Sentence 3.2.8.2.(1), and Sentence 3.4.7.5.(1), which applies to fire escapes.
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Intent	Intent 1: To limit the probability that a person tripping and falling against the leading edge of a stair tread will be harmed. Intent 2: To limit the probability that persons using the stairway will catch their heel or toe on the leading edge of a stair tread, which could lead to persons tripping or falling, which could lead to harm to persons.
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