(1) Every exit-way required by this Chapter shall consist of one or more of the components special-field in subsection (5), arranged in a series, so that—

a) Each component in a series discharges directly into the next component without the necessity for passing through any room or through any division-wall, except a wall forming part of a stair-enclosure; and

b) The last component in the series discharges directly through an exit into a street or public place or arcade of the width required by section 26.

(2) The width of any street or public place or arcade referred to in paragraph (b) of subsection (1) shall be not less than the required width of the exit from such exit-way, and in any case where two or more exit-ways from the same building discharge into the same street, public place or arcade, the width of such street, public place or arcade shall be not less than the combined required widths of the exits from such exit-ways:

Provided that, where a building is divided into two or more sections, each of which is completely cut off from the remainder by imperforate walls, floors and ceiling-floor assemblies having a fire-resistance rating of not less than two hours, each such section may, for the purposes of this subsection, be deemed to be a separate building.

(3) No exit-way shall decrease in width in the direction of travel towards the exit, except as set out in subsection (1) of section 26.

(4) Every change in level of the floor of an exit-way shall be effected by means of a ramp or a stairway.

(5) For the purposes of subsection (1), exit-way components shall comprise—

a) Passageways and ramps;

b) Stairways;

c) Foyers, vestibules and lobbies;

d) Doorways;

e) Exit-courts.