(1)
An ancillary space in a rapid transit station shall be separated from the remainder of the floor area by a fire separation having a fire-resistance rating not less than 1 h.
(2)
Except as provided in Sentence (3), a door opening from a service room onto a means of egress in a rapid transit station shall be located not less than 5 m from an escalator balustrade and from the top and bottom riser of a flight used as a means of egress from the rapid transit station.
(3)
The requirements in Sentence (2) do not apply where
(a)
the service room is sprinklered, or
(b)
there is a vestibule between the service room and the means of egress.
(4)
Where a door from a service room opens onto a means of egress less than 5 m wide
(a)
the service room shall be sprinklered, or
(b)
there shall be a vestibule between the service room and the means of egress.