Intent 1:
To exempt certain public corridors from the application
of Sentence 3.3.1.4.(1), which would otherwise require a fire
separation between a public corridor and the remainder of the storey,
on the basis that the storey is sprinklered throughout and:
- the travel distance to an exit is limited and the corridor
does not serve certain occupancies, or
- the corridor has a minimum width and ceiling height,
and the combined area of the occupancies in the corridor is restricted.
This [the sprinklering] is to limit
the probability that a fire will not be suppressed or controlled,
which could lead to the spread of fire into the public corridor, or
from the public corridor into a suite.
This [limitation on travel distance] is to limit the probability
of excessive travel distance during a fire situation.
This is to limit the probability of:
- delays in the evacuation or movement of persons to a
safe place, which could lead to harm to persons, and
- fire emergency response operations being delayed or
ineffective, which could lead to:
- delays in the evacuation or movement of persons to a
safe place, which could lead to harm to persons, including emergency
responders, and
- the spread of fire to other parts of the building, which
could lead to harm to persons.
This [the minimum corridor width and the restriction on
the area of occupancies] is to limit the probability of insufficient
corridor width during a fire situation, which could lead to:
- delays in the evacuation or movement of persons to a
safe place, which could lead to harm to persons,
- the spread of fire from occupancies on one side of the
corridor to occupancies on the other side of the corridor by means
of activities and occupancies in the corridor, and
- delays or inefficiencies in emergency response operations,
which could lead to:
- delays in the evacuation or movement of persons to a
safe place, which could lead to harm to persons, and
- the spread of fire to other parts of the building, which
could lead to harm to persons.
Intent 2:
To exempt certain public corridors from the application
of Sentence 3.3.1.4.(1) by waiving the requirement for a fire
separation of the corridor from a space containing plumbing fixtures
required by Subsection 3.7.2., on the basis that:
- the space is treated as part of the public corridor
since there is expected to be no appreciable fire load in the room,
- the storey is sprinklered throughout, and
- the room and the public corridor are separated from
the remainder of the storey.
This is to limit the probability of
the spread of fire into the public corridor, or from the public corridor
into a suite, which could lead to:
- delays in the evacuation or movement of persons to a
safe place, which could lead to harm to persons, and
- fire emergency response operations being delayed or
ineffective, which could lead to:
- delays in the evacuation or movement of persons to a
safe place, which could lead to harm to persons, including emergency
responders, and
- the spread of fire to other parts of the building, which
could lead to harm to persons.