9.8.2.2.(1)ATTRIBUTION:
Functional Statement:
F30
To minimize the risk of injury to persons as a result of tripping, slipping, falling, contact, drowning or collision.
F10
To facilitate the timely movement of persons to a safe place in an emergency.
Objective:
OS3.1, OS3.7
APPLICATION:
Minimum clear height over stairs, in buildings to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application
of Part 9].
This also applies to stairs within dwelling units in buildings to which Part 3 applies [see Sentence
1.3.3.2.(1) of Division A for application of Part 3], as
stated in Sentence
3.3.4.7.(1).
INTENT:
To limit the probability of insufficient clear height over
stairs:
- in dwelling units (1.95 m), where occupants are likely to be intimately familiar with their surroundings, or
- in other than dwelling units (2.05 m), where occupants might not be familiar with their surroundings.
This is to limit the probability of:
- persons accidentally contacting the ceiling with their head, or
- persons accidentally contacting the ceiling with their head in an emergency, which could lead to persons falling, which could lead to delays in the evacuation or movement of persons to a safe place.
This is to limit the probability of harm to persons.