(1) The walls, floor and ceiling of every passageway, or ramp forming a component of an exit-way in any occupancy-unit graded in section 4, as falling within grade A or grade B construction, shall be constructed of non-combustible materials.

(2) The headroom at every point in such passage-ways and ramps shall be not less than 2,3 metres, and the width shall be not less than the width prescribed for exit-ways in section 26.

(3) No door or window shall open so as to obstruct any such passageway or ramp.

(4) There shall be no step or ramp within a distance of 750 millimetres on either side of any doorway in any such passage-way.

(5) No such ramp shall have a slope exceeding 1 in 12.

(6) The floor of every such passageway and ramp shall have a non-slip surface free from any projections which might cause stumbling.

(7) Every such passageway and ramp which is not bounded by walls shall be provided with parapets, railings or other means of protection against falling, and such means of protection shall be not less than 1,05 metres in height.

(8) It shall be permitted to connect two buildings or separate divisions or portions of a building by means of a bridge, gallery, balcony or passage, constructed of non-combustible materials and of a width of not less than the width prescribed for exit-ways in section 26.