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(a) Public Corridors and Area Separations.
(1) In business, mercantile, industrial and storage units or buildings fully protected by a standard sprinkler system as defined in Article II of Chapter 15-16 of this Code, partitions, floor construction and ceiling construction enclosing public corridors shall be of construction providing fire resistance of not less than one hour with doors not less fire-resistive than one and three-fourths-inch solid slab doors or shall be constructed of noncombustible materials; provided, however, that wherever glass is used it shall be of minimum thickness of one-fourth inch. Corridor partitions may terminate at noncombustible ceilings in new and existing buildings.
(2) In business, mercantile, moderate hazard industrial and moderate hazard storage units any area occupied by more than one business owner, firm or corporation, or for more than one business enterprise conducted by the same owner, firm or corporation, in separate enclosures on any one floor above the first story shall be divided by partitions providing fire resistance of not less than two hours into areas not exceeding the following:
Buildings equipped throughout with an approved system of automatic sprinklers – 20,000 square feet;
All other buildings – 10,000 square feet.
In new and existing buildings partitions may terminate at noncombustible ceilings and at partitions separating occupied areas from the public corridor.
(3) In all new and existing buildings of business, mercantile, moderate hazard industrial and moderate hazard storage occupancies, area separation partitions shall not be required on any floor, occupied by a single tenant or in any single tenant space on a multiple-tenant floor.
(4) Enclosure of public corridors and area separations in other occupancies shall be as provided in the chapters of this Code covering special occupancy requirements.
(5) In all new and existing residential buildings exceeding four stories in height all apartment doors opening upon public corridors shall be equipped with approved self-closing devices.
(6) In all new and existing single-room occupancy buildings all dwelling unit doors opening at public corridors shall be equipped with approved self- closing devices.
(b) Storage Rooms. In multiple dwellings, institutional units, and assembly units, all storage rooms exceeding 100 square feet in area shall be enclosed with partitions providing fire resistance of not less than two hours, except that in open schools equipped throughout with an approved sprinkler system, as defined in Article II of Chapter 15-16 of this Code, such partitions shall provide fire resistance of not less than one hour. Openings in such partitions shall be protected with Class C fire doors.
(Prior code § 62-5; Amend Coun. J. 5-4-94, p. 49750)