SMOKE. Air-borne solid and liquid particulates and gases evolved when a material undergoes pyrolysis or combustion, including the quality of air that is entrained or otherwise mixed into the mass.

SMOKE ALARM. A single- or multiple-station alarm responsive to smoke and not connected to a fire alarm system. See "Multiple-station smoke alarm" and "Single-station smoke alarm."

SMOKE BARRIER. A continuous membrane, either vertical or horizontal, such as a wall, floor, or ceiling assembly, that is designed and constructed in accordance with Section 709 to restrict the movement of smoke.

SMOKE COMPARTMENT. A space within a building enclosed by smoke barriers on all sides, including the top and bottom.

SMOKE CONTROL MODE. A predefined operational configuration of a system or device for the purpose of smoke control.

SMOKE CONTROL SYSTEM, MECHANICAL. An engineered system that includes all methods that can be used singly or in combination to modify smoke movement.

SMOKE CONTROL SYSTEM, PASSIVE. A system of smoke barriers arranged to limit the migration of smoke.

SMOKE CONTROL ZONE. A space within a building enclosed by smoke barriers that is part of a smoke control system.

SMOKE DAMPER. See "Dampers, Types of."

SMOKE DETECTOR. A listed device that senses visible or invisible particles of combustion or smoke.

SMOKE PARTITION. A continuous vertical assembly that is designed and constructed to restrict the movement of smoke and is not generally required to have a fire-resistance rating in accordance with Section 710.

SMOKE-DEVELOPED INDEX. A comparative measure, expressed as a dimensionless number, derived from measurements of smoke obscuration versus time for a material tested in accordance with ASTM E 84.

SMOKEPROOF ENCLOSURE. An exit stairway, ramp or passageway designed and constructed so that the movement of the products of combustion produced by a fire occurring in any part of the building into the enclosure is limited.

FIRE ALARM CONTROL UNIT. A system component that receives inputs from automatic and manual fire alarm devices and may be capable of supplying power to detection devices and transponders or off-premises transmitters. The control unit may be capable of providing a transfer of power to the notification appliances and transfer of condition to relays or devices.

FIRE ALARM SIGNAL. A signal initiated by a fire alarm-initiating device such as a manual fire alarm box, automatic fire detector, waterflow switch, or other device whose activation is indicative of the presence of a fire or fire signature.

FIRE ALARM SYSTEM. A system or portion of a combination system consisting of components and circuits arranged to monitor and annunciate the status of fire alarm or supervisory signal-initiating devices and to initiate the appropriate response to those signals.

FIRE AREA. The aggregate floor area enclosed and bounded by fire walls, fire barriers, exterior walls and/or horizontal assemblies of a building. Areas of the building not provided with surrounding walls shall be included in the fire area if such areas are included within the horizontal projection of the roof or floor next above.

FIRE BARRIER. A fire-resistance-rated wall assembly of materials complying with Section 707 designed to restrict the spread of fire in which continuity of the fire-resistance rating is maintained.

FIRE COMMAND CENTER. The principal attended or unattended location where the status of detection, alarm communications and control systems is displayed, and from which the systems can be manually controlled.

FIRE DAMPER. See "Dampers, Types of."

FIRE DETECTOR, AUTOMATIC. A device designed to detect the presence of a fire signature and to initiate action.

FIRE DOOR. The door component of a fire door assembly.

FIRE DOOR ASSEMBLY. Any combination of a fire door, frame, hardware, and other accessories that together, as an opening protective, provide a specific degree of fire protection to the opening.

FIRE DOOR ASSEMBLY, FLOOR. See "Floor fire door assembly."

FIRE EXIT HARDWARE. Panic hardware that is listed for use on fire door assemblies.

FIRE LANE. A public or private road, roadway lane, parking lot lane or other surface designed to allow vehicular access, that has been specifically designated by means of signs or roadway markings as a priority thoroughfare for fire apparatus.

FIRE PARTITION. A vertical assembly of materials complying with Section 708, designed to restrict the spread of fire in which openings are protected.

FIRE PROTECTION RATING. The period of time that an opening protective assembly will maintain the ability to confine a fire as determined by tests prescribed in Section 716. Ratings are stated in hours or minutes.

FIRE PROTECTION SYSTEM. Approved devices, equipment and systems or combinations of systems used to detect a fire, activate an alarm, extinguish or control a fire, control or manage smoke and products of a fire or any combination thereof.

FIRE PUMP. A pump exclusively used to boost water supply pressures in a fire protection system.

FIRE PUMP, AUTOMATIC STANDPIPE. A fire pump located at or below street level or as required, at the design flood elevation, that supplies the lower 300 feet (91.4 m) of an automatic standpipe system or a combined standpipe and sprinkler system. This does not apply to manual wet standpipe systems which are combined with sprinkler systems.

FIRE PUMP, FOAM. A fire pump used to boost water supply pressures in a fire protection system where such system uses firefighting foam as an additive.

FIRE PUMP, LIMITED SERVICE. A fire pump with a motor rating not exceeding 30 hp and utilizing a limited service fire pump controller.

FIRE PUMP, SPECIAL SERVICE. A fire pump that is located above street level, and above flood level, and that receives its water supply from a gravity tank or suction tank.

FIRE PUMP, SPRINKLER BOOSTER PUMP. A fire pump that supplies sprinkler systems only.

FIRE PUMP, WATER MIST SYSTEM. A fire pump used to boost water supply pressures in a fire protection system where such system utilizes water misting technology.

FIRE RESISTANCE. That property of materials or their assemblies that prevents or retards the passage of excessive heat, hot gases or flames under conditions of use.

FIRE SAFETY FUNCTIONS. Building and fire control functions that are intended to increase the level of life safety for occupants or to control the spread of harmful effects of fire.

FIRE SEPARATION DISTANCE. The distance measured from the building face to one of the following:

The closest interior tax lot line;

To the centerline of a street, an alley or public space; or

To an imaginary line between two buildings on the same tax lot.

The distance shall be measured at right angles from the face of the wall.

FIRE WALL. A fire-resistance-rated smoke-tight wall having protected openings, which restricts the spread of fire and extends continuously from the foundation to or through the roof, with sufficient structural stability under fire conditions to allow collapse of construction on either side without collapse of the wall.

FIRE WINDOW ASSEMBLY. A window, as an opening protective, constructed and glazed to give protection against the passage of fire, smoke and hot gases.

FIREBLOCKING. A building material or materials approved for use as fireblocking to resist the free passage of flame or hot gases to other areas of the building through concealed spaces.

FIRECUT. A sloping cut on the ends of wood beams, joists and rafters resting on masonry or concrete walls.

FIREPLACE. A hearth and fire chamber or similar prepared place in which a fire may be made and that is built in conjunction with a chimney.

FIREPLACE THROAT. The opening between the top of the firebox and the smoke chamber.

FIRE-RATED GLAZING. Glazing with either a fire protection rating or a fire-resistance rating.

FIRE-RESISTANCE RATING. The period of time a building element, component or assembly maintains the ability to withstand fire exposure, continues to perform a given structural function, or both, as determined by the tests, or the methods based on tests, prescribed in Section 703.

FIRE-RESISTANT JOINT SYSTEM. An assemblage of specific materials or products that are designed, tested, and fire-resistance rated in accordance with either ASTM E 1966 or UL 2079 to resist for a prescribed period of time the passage of fire through joints made in or between fire resistance-rated assemblies.

FIRESTOPPING. A through-penetration firestop or a membrane penetration firestop.