In this Chapter, unless the context otherwise requires,—
(a) "exit" means an escape route which includes passage, channel or means of access from any buildings, storeys or floor area to a street or other open space of safety and includes a vertical exit or a horizontal exit or an outside exit;
Explanation.—In this clause,— "vertical exit" means an exit used for ascension or descension between two or more levels including stairways, smoke proof towers, ramps, lifts, escalators and fire escapes,
(ii) "horizontal exit" means a protected opening through or around a fire wall or a bridge connecting two buildings,
(iii) "outside exit" means an exit from the building to a street or to an open area leading to a street or to an enclosed fire resistive passage leading to a street;
(b) "travel distance" means the distance from the exit of a tenement of any premises on a floor of a building to a place of safety, be it a vertical exit, a horizontal exit or an outside exit, measured along the line of travel.