Exception: Occupancies with an existing, permitted automatic fire - extinguishing system.

14X-5-504.3.1 Public utility structures.

Every existing structure that is owned or operated by any person whose primary business is the generation or transmission of electrical power and that houses one or more electrical generators, electrical transformers, or switching equipment for a service area beyond the structure in which the equipment is located must be equipped throughout with an automatic fire-extinguishing system.

14X-5-504.3.2 Telecommunication equipment areas.

Every fire area within an existing structure containing a telecommunication equipment area that exceeds 150 square feet (13.93 m2) must be equipped with an automatic fire-extinguishing system.

14X-5-504.3.3 Telephone exchanges.

Every existing structure which is used as a telephone exchange must be equipped throughout with an automatic fire-extinguishing system.

14X-5-504.4 Standpipes.

Existing structures must be equipped with standpipes installed in accordance with Section 905 of the Chicago Building Code where required in Sections 14X-5-504.4.1 through 14X-5-504.4.4. The fire code official is authorized to approve the installation of manual dry or manual wet standpipe systems to achieve compliance with this section.

Exceptions:

1.   Occupancies with existing, permitted standpipes.

2.   Standpipes are not required in grain elevators or similar storage structures where standpipes would be ineffective due to the type of structure and inaccessibility of hose connections.

14X-5-504.4.1 Group A-1.

Every existing building containing a Group A-1 occupancy must have standpipes provided on each side of the stage block. In fire areas not equipped with an automatic sprinkler system, standpipes must also be provided on each tier of dressing rooms and within 50 feet (15.2 m) of all property rooms, store rooms, or work rooms.

14X-5-504.4.2 Group A, exhibition areas.

Every existing building must be equipped with standpipes in each fire area containing an exhibition area , spaced to provide complete coverage with 100 foot (30.5 m) hose lengths and 30 foot (9.1 m) hose streams.

Exception: Buildings that do not contain more than 5,000 square feet (465 m2) of floor area, in aggregate, used as an exhibition area.