Page 63 - 2018_IFC

DEFINITIONS

that could be occasioned by the presence of flammable vola- ume. Gaseous hydrogen systems consist of items such as
tiles or combustible materials processed or heated in the fur- compressed gas containers, reactors and appurtenances,
nace. including pressure regulators, pressure relief devices, mani-
folds, pumps, compressors and interconnecting piping and
Note: Such flammable volatiles or combustible materials can,
for instance, originate from the following: tubing and controls.
GLOVE BOX. A sealed enclosure in which items inside the
1. Paints, powders, inks, and adhesives from finishing box are handled exclusively using long gloves sealed to ports
processes, such as dipped, coated, sprayed and impreg- in the enclosure.
nated materials.
[BG] GRADE FLOOR OPENING. A window or other
2. The substrate material.
opening located such that the sill height of the opening is not
3. Wood, paper and plastic pallets, spacers or packaging more than 44 inches (1118 mm) above or below the finished
materials. ground level adjacent to the opening.
4. Polymerization or other molecular rearrangements. [BG] GRADE PLANE. A reference plane representing the
average of finished ground level adjoining the building at
Potentially flammable materials, such as quench oil,
waterborne finishes, cooling oil or cooking oils, that present a exterior walls. Where the finished ground level slopes away
hazard are ventilated according to Class A standards. from the exterior walls, the reference plane shall be estab-
lished by the lowest points within the area between the build-
FURNACE CLASS B. An oven or furnace that has heat uti- ing and the lot line or, where the lot line is more than 6 feet
lization equipment operating at approximately atmospheric (1829 mm) from the building, between the building and a
pressure wherein there are no flammable volatiles or combus- point 6 feet (1829 mm) from the building.
tible materials being heated.
[BE] GRANDSTAND. Tiered seating supported on a dedi-
FURNACE CLASS C. An oven or furnace that has a poten- cated structural system and two or more rows high and is not
tial hazard due to a flammable or other special atmosphere a building element (see “Bleachers”).
being used for treatment of material in process. This type of
furnace can use any type of heating system and includes a [BG] GROUP HOME. A facility for social rehabilitation,
special atmosphere supply system. Also included in the Class substance abuse or mental health problems that contains a
C classification are integral quench furnaces and molten salt group housing arrangement that provides custodial care but
bath furnaces. does not provide medical care.
[BE] GUARD. A building component or a system of build-
FURNACE CLASS D. An oven or furnace that operates at
temperatures from above ambient to over 5,000°F (2760°C) ing components located at or near the open sides of elevated
and at pressures normally below atmospheric using any type walking surfaces that minimizes the possibility of a fall from
of heating system. These furnaces can include the use of spe- the walking surface to a lower level.
cial processing atmospheres. [BG] GUESTROOM. A room used or intended to be used
by one or more guests for living or sleeping purposes.
GAS CABINET. A fully enclosed, ventilated, noncombusti-
ble enclosure used to provide an isolated environment for [BS] GYPSUM BOARD. Gypsum wallboard, gypsum
compressed gas cylinders in storage or use. Doors and access sheathing, gypsum base for gypsum veneer plaster, exterior
ports for exchanging cylinders and accessing pressure-regu- gypsum soffit board, predecorated gypsum board or water-
lating controls are allowed to be included. resistant gypsum backing board complying with the standards
listed in Tables 2506.2 and 2507.2 and Chapter 35 of the
GAS DETECTION SYSTEM. A system or portion of a International Building Code.
combination system that utilizes one or more stationary sen-
sors to detect the presence of a specified gas at a specified [BG] HABITABLE SPACE. A space in a building for liv-
concentration and initiate one or more responses required by ing, sleeping, eating or cooking. Bathrooms, toilet rooms,
this code, such as notifying a responsible person, activating closets, halls, storage or utility spaces and similar areas are
an alarm signal, or activating or deactivating equipment. A not considered habitable spaces.
self-contained gas detection and alarm device is not classified HALOGENATED EXTINGUISHING SYSTEM. A fire-
as a gas detection system. extinguishing system using one or more atoms of an element

GAS ROOM. A separately ventilated, fully enclosed room in from the halogen chemical series: fluorine, chlorine, bromine
which only compressed gases and associated equipment and and iodine.
supplies are stored or used. HANDLING. The deliberate transport by any means to a
point of storage or use.
GAS ROOM, HYDROGEN FUEL. See “Hydrogen fuel
gas room.” [BE] HANDRAIL. A horizontal or sloping rail intended for
grasping by the hand for guidance or support.
GASEOUS HYDROGEN SYSTEM. An assembly of pip-
ing, devices and apparatus designed to generate, store, con- HAZARDOUS MATERIALS. Those chemicals or sub-
tain, distribute or transport a nontoxic, gaseous hydrogen- stances which are physical hazards or health hazards as
containing mixture having not less than 95-percent hydrogen defined and classified in this chapter, whether the materials
gas by volume and not more than 1-percent oxygen by vol- are in usable or waste condition.

30 2018 INTERNATIONAL FIRE CODE ®
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