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ORDINANCE NS - 1163 Horizontal exit walls used for compartmenting a building shall not have openings therein which would per- mit transfer of smoke from one compartment to the other except for required exits. For sprinkler alternate see Subsection (m). (c) Fire Alarm. A manual fire alarm box shall be located adjacent to exit doors into stairway shafts and in every elevator lobby. The box shall be connected to the Central Control Station and to the voice communica- tion system as required by Subsections (f) and (g). The system shall be designed in accordance with U.B.C. Standard No. 18-1. (d) Fire Detectors. An approved system which will provide for automatic detection of products of combustion other than heat shall be installed in every mechanical equipment room and in the return air portion of every air conditLoning and mechanical ventilation system that serves floors other than the floor on which the equipment is lo- cated. The detectors shall be set to operate within the limitations of U.B.C. Standard No. 43-6 and shall be located at each opening into the vertical shaft. (e) Voice Alarm System. Both the detection system and the fire alarm system shall activate a voice alarm system capable of being operated from the Central Control Station on both a general as well as a selective basis dependent upon the compartmentation involved. The alarm shall be designed to be heard by all occupants within the building or designated portions thereof as specified for the voice communication system. The elevator lobby detec- tor required by Chapter 51 shall be connected to the system. (f) Voice Communication System. There shall be two separate approved continuously electrically supervised voice communication systems; one for Fire Department communication system and the other a public voice communi- cation (address) system between the central control station and the following areas: 1. Elevators, elevator lobbies, corridors and stairways. 2. Every office area exceeding 1,000 square feet in area. 3. Each dwelling unit and hotel guest room. When approved, the fire department system may be combined with the public voice communication system and voice alarm system. (g) Central Control Station. A central control station for Fire Department operations shall be provided in a location approved by the Fire Department. It shall contain the voice communication systems panel; fire detec- tion and alarm system panels; status indicators and controls for elevators; air handling systems; controls for unlocking stairway doors; a public telephone; sprinkler valve and water flow detectors; and standby power controls. -2-