Intent 1:
To supersede the requirements of Sentence 3.4.4.1.(1) for a rated fire separation and of Sentence 3.4.4.2.(1) prohibiting exits to lead through lobbies, if certain
measures are taken.
This is to limit the probability
that:
- excessive height above grade of the lobby will delay
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,
- excessive travel distances through the lobby will lead
to delays in evacuating, which could lead to harm to persons, and
- smoke from a fire in a room, premise or interconnected
floor space, or a fire in an adjacent occupancy, will spread into
the lobby, which could 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,
- harm to persons, and
- 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.