(1) If a fire escape serves any storey above the second, openings located in a zone described in Sentence (2), including access doorways in the exterior walls of the building to which the fire escape is attached, shall be protected by closures conforming to Subsection 3.1.8.
(2) The zone referred to in Sentence (1) extends from any balcony, platform or stairway of a fire escape to a distance,
(a) 3 m horizontally,
(b) 10 m below, and
(c) 1 800 mm above.