Page 52 - 2018_IFC

DEFINITIONS

cally detects a fire and discharges an approved fire-extin- magazine or building containing explosives when the trees
guishing agent onto or in the area of a fire. are bare of leaves.
AUTOMATIC SMOKE DETECTION SYSTEM. A fire BARRICADED. The effective screening of a building con-
alarm system that has initiation devices that utilize smoke taining explosive materials from the magazine or other build-
detectors for protection of an area such as a room or space ing, railway or highway by a natural or an artificial barrier. A
with detectors to provide early warning of fire. straight line from the top of any sidewall of the building con-
AUTOMATIC SPRINKLER SYSTEM. An automatic taining explosive materials to the eave line of any magazine
sprinkler system, for fire protection purposes, is an integrated or other building or to a point 12 feet (3658 mm) above the
system of underground and overhead piping designed in accor- center of a railway or highway shall pass through such bar-
dance with fire protection engineering standards. The system rier.
includes a suitable water supply. The portion of the system [BG] BASEMENT. A story that is not a story above grade
above the ground is a network of specially sized or hydrauli- plane.
cally designed piping installed in a structure or area, generally
overhead, and to which automatic sprinklers are connected in a BATTERY SYSTEM, STATIONARY STORAGE. A
systematic pattern. The system is usually activated by heat rechargeable energy storage system consisting of electro-
from a fire and discharges water over the fire area. chemical storage batteries, battery chargers, controls and
associated electrical equipment designed to provide electrical
AUTOMATIC WATER MIST SYSTEM. A system con-
sisting of a water supply, a pressure source and a distribution power to a building. The system is typically used to provide
piping system with attached nozzles which, at or above a standby or emergency power, an uninterruptable power sup-
minimum operating pressure, defined by its listing, dis- ply, load shedding, load sharing or similar capabilities.
charges water in fine droplets meeting the requirements of BATTERY TYPES.
NFPA 750 for the purpose of the control, suppression or
extinguishment of a fire. Such systems include wet-pipe, dry- Flow battery. A type of storage battery that includes
pipe and pre-action types. The systems are designed as engi- chemical components dissolved in two different liquids.
neered, preengineered, local-application or total flooding sys- Ion exchange, which provides the flow of electrical cur-
tems. rent, occurs through the membrane while both liquids cir-
culate in their respective spaces.
AUTOMOTIVE MOTOR FUEL-DISPENSING FACIL-
ITY. That portion of property where flammable or combusti- Lead-acid battery. A storage battery that is comprised of
ble liquids or gases used as motor fuels are stored and lead electrodes immersed in sulphuric acid electrolyte.
dispensed from fixed equipment into the fuel tanks of motor Lithium-ion battery. A storage battery with lithium ions
vehicles.
serving as the charge carriers of the battery. The electro-
AVERAGE AMBIENT SOUND LEVEL. The root mean lyte is a polymer mixture of carbonates with an inorganic
square, A-weighted sound pressure level measured over a 24- salt and can be in a liquid or a gelled polymer form. Lithi-
hour period, or the time any person is present, whichever time ated metal oxide is typically a cathode and forms of car-
period is less. bon or graphite typically form the anode.
[BG] AWNING. An architectural projection that provides Nickel-cadmium (Ni-Cd) battery. An alkaline storage
weather protection, identity or decoration and is partially or battery in which the positive active material is nickel
wholly supported by the building to which it is attached. An oxide, the negative contains cadmium and the electrolyte
awning is comprised of a lightweight frame structure over is potassium hydroxide.
which a covering is attached.
Preengineered stationary storage battery system. An
[BE] BALANCED DOOR. A door equipped with double- energy storage system consisting of batteries, a battery
pivoted hardware so designed as to cause a semicounter bal- management system, components and modules that are
anced swing action when opening. produced in a factory, designed to comprise the system
BALED COTTON. See “Cotton.” when assembled on the job site.
BALED COTTON, DENSELY PACKED. See “Cotton.” Prepackaged stationary storage battery system. An
energy storage system consisting of batteries, a battery
BARRICADE. A structure that consists of a combination of
walls, floor and roof, which is designed to withstand the rapid management system, components and modules that is fac-
release of energy in an explosion and which is fully confined, tory assembled and shipped as a complete unit for installa-
partially vented or fully vented; or other effective method of tion at the job site.
shielding from explosive materials by a natural or artificial Sodium-beta storage battery. A storage battery, also
barrier. referred to as a Na-beta battery or NBB, which uses a solid
Artificial barricade. An artificial mound or revetment beta-alumina electrolyte membrane that selectively allows
with a minimum thickness of 3 feet (914 mm). sodium ion transport between a positive electrode such as
metal halide and a negative sodium electrode.
Natural barricade. Natural features of the ground, such
as hills, or timber of sufficient density that the surrounding Stationary storage battery. A group of electrochemical
exposures that require protection cannot be seen from the cells interconnected to supply a nominal voltage of DC

2018 INTERNATIONAL FIRE CODE ® 19
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