Page 83 - 2018_IFC

DEFINITIONS

portation. Nontransportation vessels, such as houseboats and ZONE. A defined area within the protected premises. A zone
boathouses, are included in this definition. can define an area from which a signal can be received, an
area to which a signal can be sent or an area in which a form
VISIBLE ALARM NOTIFICATION APPLIANCE. A
notification appliance that alerts by the sense of sight. of control can be executed.
ZONE, NOTIFICATION. An area within a building or
WATER MIST SYSTEM, AUTOMATIC. See “Automatic
water mist system.” facility covered by notification appliances which are acti-
vated simultaneously.
WATER-REACTIVE MATERIAL. A material that
explodes; violently reacts; produces flammable, toxic or other
hazardous gases; or evolves enough heat to cause autoigni-
tion or ignition of combustibles upon exposure to water or
moisture. Water-reactive materials are subdivided as follows:
Class 3. Materials that react explosively with water with-
out requiring heat or confinement.
Class 2. Materials that react violently with water or have
the ability to boil water. Materials that produce flammable,
toxic or other hazardous gases, or evolve enough heat to
cause autoignition or ignition of combustibles upon expo-
sure to water or moisture.
Class 1. Materials that react with water with some release
of energy, but not violently.
WET FUELING. See “Mobile fueling.”
WET HOSING. See “Mobile fueling.”
WET-CHEMICAL EXTINGUISHING AGENT. A solu-
tion of water and potassium-carbonate-based chemical, potas-
sium-acetate-based chemical or a combination thereof,
forming an extinguishing agent.
WHARF. A structure or bulkhead constructed of wood,
stone, concrete or similar material built at the shore of a har-
bor, lake or river for vessels to lie alongside of, and to anchor
piers or floats.
WILDFIRE RISK AREA. Land that is covered with grass,
grain, brush or forest, whether privately or publicly owned,
which is so situated or is of such inaccessible location that a
fire originating upon it would present an abnormally difficult
job of suppression or would result in great or unusual damage
through fire or such areas designated by the fire code official.
[BE] WINDER. A tread with nonparallel edges.
WIRELESS PROTECTION SYSTEM. A system or a part
of a system that can transmit and receive signals without the
aid of wire.
WORKSTATION. A defined space or an independent prin-
cipal piece of equipment using HPM within a fabrication area
where a specific function, laboratory procedure or research
activity occurs. Approved or listed hazardous materials stor-
age cabinets, flammable liquid storage cabinets or gas cabi-
nets serving a workstation are included as part of the
workstation. A workstation is allowed to contain ventilation
equipment, fire protection devices, detection devices, electri-
cal devices and other processing and scientific equipment.
[BG] YARD. An open space, other than a court, unob-
structed from the ground to the sky, except where specifically
provided by the International Building Code, on the lot on
which a building is situated.

50 2018 INTERNATIONAL FIRE CODE ®
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