Back3.4.4.2.(1)

ATTRIBUTION:

Functional Statement:

F05

To retard the effects of fire on emergency egress facilities.

F06

To retard the effects of fire on facilities for notification, suppression and emergency response.

Objective:

OS1.5

 

APPLICATION:

Exits from a floor area above or below the first storey leading through lobbies.
This applies to exits serving floor areas that are intended for occupancy, including mezzanines as stated in Sentence 3.4.2.2.(1), in buildings described in Sentence 1.3.3.2.(1) of Division A.
This also applies to tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1).

INTENT:

To limit the probability that a fire that has spread into a lobby from an adjacent floor area will lead to untenable conditions in the exit, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
To limit the probability that a fire that has spread into a lobby from an adjacent floor area will lead to untenable conditions in the exit, which could lead to delays or ineffectiveness in fire 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, including emergency responders.