3.3.1.9. Corridors (1) The minimum width of a public corridor shall be 1 100 mm. (2) Except as required by Sentences 3.3.3.3.(2) and (3), the minimum unobstructed width shall be 1 100 mm for every (a) corridor used by the public, (b) corridor serving classrooms, and (c) corridor in a Group B, Division 2 or 3 occupancy where the corridor (i) serves a service room, (ii) serves an administrative area, (iii) will not be used by non-ambulatory outpatients, or (iv) will not be used by non-ambulatory residents. (3) Except as permitted by Sentence (4), obstructions located within 1 980 mm of the floor shall not project more than 100 mm horizontally in a manner that would create a hazard for a person with a visual disability travelling adjacent to the walls in (a) an exit passageway, (b) a public corridor, (c) a corridor used by the public, (d) a corridor serving classrooms, or (e) a corridor serving patients’ or residents’ sleeping rooms in a Group B, Division 2 or Division 3 occupancy. (4) The horizontal projection of an obstruction referred to in Sentence (3) is permitted to be more than 100 mm provided the clearance between the obstruction and the floor is less than 680 mm. (5) If a public corridor, a corridor used by the public, a corridor serving classrooms or a corridor serving patients’ or residents’ sleeping rooms in a Group B, Division 2 or Division 3 occupancy, contains an occupancy, the occupancy shall not reduce the unobstructed width of the corridor to less than its required width. (6) If a public corridor conforming to Clause 3.4.2.5.(1)(d) contains an occupancy (a) the occupancy shall be located so that for pedestrian travel there is an unobstructed width not less than 3 m at all times adjacent and parallel to all rooms and suites that front onto the public corridor, and (b) the combined area of all occupancies in the public corridor shall be not more than 15% of the area of the public corridor. (7) Except as provided in Sentence 3.3.3.3.(1), a dead end corridor shall conform to Sentences (8) to (14). (8) A dead end corridor is permitted in an assembly occupancy where there is a second and separate egress doorway from each room or suite not leading into a dead end corridor. (9) In a residential occupancy, except for corridors served by a single exit as described in Sentence 3.3.4.4.(7), a dead end public corridor is permitted provided it is not more than 6 m long. (10) Dead end corridors in Sentence (9) shall contain no door openings to service rooms containing fuel-fired appliances or rooms which may be considered a hazard. (11) A dead end public corridor is permitted in a business and personal services occupancy where (a) the dead end corridor (i) serves an occupant load of not more than 30 persons, (ii) is not more than 9 m long, and (iii) is provided with doors having self-closing devices, or (b) there is a second and separate egress doorway from each room or suite not leading into a dead end corridor. (12) A dead end corridor is permitted in a mercantile occupancy where (a) the dead end corridor (i) serves an occupant load of not more than 30 persons, (ii) is not more than 9 m long, and (iii) is provided with doors having self-closing devices, or (b) there is a second and separate egress doorway from each room or suite not leading into a dead end corridor. (13) A dead end corridor is permitted in a low or medium hazard industrial occupancy where (a) the dead end corridor (i) serves an occupant load of not more than 30 persons, (ii) is not more than 9 m long, and (iii) is provided with doors having self-closing devices, or (b) there is a second and separate egress doorway from each room or suite not leading into a dead end corridor. (14) A dead end corridor is permitted in a high hazard industrial occupancy where there is a second and separate egress doorway from each room or suite not leading into a dead end corridor.