Page 57 - 2018_IFC

DEFINITIONS

DETONATION. An exothermic reaction characterized by DRAFT CURTAIN. A structure arranged to limit the spread
the presence of a shock wave in the material which estab- of smoke and heat along the underside of the ceiling or roof.
lishes and maintains the reaction. The reaction zone pro- [BF] DRAFTSTOP. A material, device or construction
gresses through the material at a rate greater than the velocity installed to restrict the movement of air within open spaces of
of sound. The principal heating mechanism is one of shock concealed areas of building components such as crawl spaces,
compression. Detonations have an explosive effect. floor/ceiling assemblies, roof/ceiling assemblies and attics.
DETONATOR. A device containing any initiating or pri- DRY-CHEMICAL EXTINGUISHING AGENT. A pow-
mary explosive that is used for initiating detonation. A deto-
der composed of small particles, usually of sodium bicarbon-
nator shall not contain more than 154.32 grains (10 grams) of ate, potassium bicarbonate, urea-potassium-based bicarbon-
total explosives by weight, excluding ignition or delay ate, potassium chloride or monoammonium phosphate, with
charges. The term includes, but is not limited to, electric added particulate material supplemented by special treatment
blasting caps of instantaneous and delay types, blasting caps to provide resistance to packing, resistance to moisture
for use with safety fuses, detonating cord delay connectors, absorption (caking) and the proper flow capabilities.
and noninstantaneous and delay blasting caps which use deto-
nating cord, shock tube or any other replacement for electric DRY CLEANING. The process of removing dirt, grease,
leg wires. All types of detonators in strengths through No. 8 paints and other stains from such items as wearing apparel,
1
cap should be rated at 1 / pounds (0.68 kg) of explosives per textiles, fabrics and rugs by use of nonaqueous liquids (sol-
2
1,000 caps. For strengths higher than No. 8 cap, consult the vents).
manufacturer. DRY CLEANING PLANT. A facility in which dry cleaning
[BG] DETOXIFICATION FACILITIES. Facilities that and associated operations are conducted, including the office,
provide treatment for substance abuse serving care recipients receiving area and storage rooms.
who are incapable of self-preservation or who are harmful to DRY CLEANING ROOM. An occupiable space within a
themselves or others. building used for performing dry cleaning operations, the
DIP TANK. A tank, vat or container of flammable or com- installation of solvent-handling equipment or the storage of
bustible liquid in which articles or materials are immersed for dry cleaning solvents.
the purpose of coating, finishing, treating and similar pro- DRY CLEANING SYSTEM. Machinery or equipment in
cesses. which textiles are immersed or agitated in solvent or in which
DISCHARGE SITE. The immediate area surrounding the dry cleaning solvent is extracted from textiles.
fireworks mortars used for an outdoor fireworks display. DUTCH DOOR. A door divided horizontally so that the top
DISPENSING. The pouring or transferring of any material can be operated independently from the bottom.
from a container, tank or similar vessel, whereby vapors, [BG] DWELLING. A building that contains one or two
dusts, fumes, mists or gases are liberated to the atmosphere. dwelling units used, intended or designed to be used, rented,
DISPENSING DEVICE, OVERHEAD TYPE. A dispens- leased, let or hired out to be occupied for living purposes.
ing device that consists of one or more individual units [BG] DWELLING UNIT. A single unit providing complete,
intended for installation in conjunction with each other, independent living facilities for one or more persons, includ-
mounted above a dispensing area typically within the motor ing permanent provisions for living, sleeping, eating, cooking
fuel-dispensing facility canopy structure, and characterized and sanitation.
by the use of an overhead hose reel.
EARLY SUPPRESSION FAST-RESPONSE (ESFR)
DISPLAY SITE. The immediate area where a fireworks dis- SPRINKLER. A sprinkler listed for early suppression fast-
play is conducted. The display area includes the discharge response performance.
site, the fallout area and the required separation distance from [BE] EGRESS COURT. A court or yard which provides
the mortars to spectator viewing areas. The display area does access to a public way for one or more exits.
not include spectator viewing areas or vehicle parking areas.
ELECTROSTATIC FLUIDIZED BED. A container hold-
DOOR, BALANCED. See “Balanced door.”
ing powder coating material that is aerated from below so as
DOOR, DUTCH. See “Dutch door.” to form an air-supported expanded cloud of such material that
DOOR, LOW ENERGY POWER-OPERATED. See is electrically charged with a charge opposite to that of the
“Low energy power-operated door.” object to be coated. Such object is transported through the
container immediately above the charged and aerated materi-
DOOR, POWER-ASSISTED. See “Power-assisted door.”
als in order to be coated.
DOOR, POWER-OPERATED. See “Power-operated door.”
ELEVATOR GROUP. A grouping of elevators in a building
DOORWAY, EXIT ACCESS. See “Exit access doorway.” located adjacent or directly across from one another that
respond to a common hall call button(s).
[BG] DORMITORY. A space in a building where group
sleeping accommodations are provided in one room, or in a EMERGENCY ALARM SYSTEM. A system to provide
series of closely associated rooms, for persons not members indication and warning of emergency situations involving
of the same family group, under joint occupancy and single hazardous materials.
management, as in college dormitories or fraternity houses.

24 2018 INTERNATIONAL FIRE CODE ®
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