(1)
The minimum clear width of an exterior doorway used as an exit shall be 750 mm.
(2)
Except as provided in Sentence (3), the minimum headroom clearance in every exit shall conform to Article 3.4.3.4.
(3)
An openable window or panel used as an exit shall have
(a)
an opening not less than 900 mm by 550 mm, and
(b)
a fire escape or stair, where required by Article 2.2.7.9.