Page 44 - 2018_IRC

DEFINITIONS

[MP] HIGH-TEMPERATURE (H.T.) CHIMNEY. A high [MP] INDIVIDUAL SEWAGE DISPOSAL SYSTEM. A
temperature chimney complying with the requirements of UL system for disposal of sewage by means of a septic tank or
103. A Type H.T. chimney is identifiable by the markings mechanical treatment, designed for use apart from a public
“Type H.T.” on each chimney pipe section. sewer to serve a single establishment or building.
[RB] HILL. With respect to topographic wind effects, a land [MP] INDIVIDUAL VENT. A pipe installed to vent a single
surface characterized by strong relief in any horizontal direc- fixture drain that connects with the vent system above or ter-
tion. minates independently outside the building.
[RB] HISTORIC BUILDING. A building or structure that [MP] INDIVIDUAL WATER SUPPLY. A supply other
is one or more of the following: than an approved public water supply that serves one or more
1. Listed, or certified as eligible for listing, by the State families.
Historic Preservation Officer or the Keeper of the [RE] INFILTRATION. For the definition applicable in
National Register of Historic Places in the National Chapter 11, see Section N1101.6.
Register of Historic Places.
[RB] INSULATED SIDING. A type of continuous insula-
2. Designated as historic under an applicable state or local tion, with manufacturer-installed insulating material as an
law. integral part of the cladding product, having a minimum R-
3. Certified as a contributing resource within a National value of R-2. For the definition applicable in Chapter 11, see
Register-listed, or a state-designated or locally desig- Section N1101.6.
nated historic district. [RB] INSULATED VINYL SIDING. A vinyl cladding
For the definition applicable in Chapter 11, see Section product, with manufacturer-installed foam plastic insulating
N1101.6. material as an integral part of the cladding product, having a
thermal resistance of not less than R-2.
[MP] HORIZONTAL BRANCH, DRAINAGE. A drain
pipe extending laterally from a soil or waste stack or building [RB] INSULATING CONCRETE FORM (ICF). A con-
drain, that receives the discharge from one or more fixture crete forming system using stay-in-place forms of rigid foam
drains. plastic insulation, a hybrid of cement and foam insulation, a
[MP] HORIZONTAL PIPE. Any pipe or fitting that makes hybrid of cement and wood chips, or other insulating material
an angle of less than 45 degrees (0.79 rad) with the horizon- for constructing cast-in-place concrete walls.
tal. [RB] INSULATING SHEATHING. An insulating board
[MP] HOT WATER. Water at a temperature greater than or having a thermal resistance of not less than R-2 of the core
equal to 110°F (43°C). material.
[RB] HURRICANE-PRONE REGIONS. Areas vulnerable For the definition applicable in Chapter 11, see Section
to hurricanes, defined as the U.S. Atlantic Ocean and Gulf of N1101.6.
Mexico coasts where the ultimate design wind speed, V , is [RB] JURISDICTION. The governmental unit that has
ult
greater than 115 miles per hour (51 m/s), and Hawaii, Puerto adopted this code.
Rico, Guam, Virgin Islands and America Samoa.
[RB] KITCHEN. Kitchen shall mean an area used, or desig-
[MP] HYDROGEN-GENERATING APPLIANCE. A nated to be used, for the preparation of food.
self-contained package or factory-matched packages of inte-
grated systems for generating gaseous hydrogen. Hydrogen- [RB] LABEL. An identification applied on a product by the
generating appliances utilize electrolysis, reformation, chem- manufacturer that contains the name of the manufacturer, the
ical or other processes to generate hydrogen. function and performance characteristics of the product or
material, and the name and identification of an approved
[MP] IGNITION SOURCE. A flame, spark or hot surface agency and that indicates that the representative sample of the
capable of igniting flammable vapors or fumes. Such sources product or material has been tested and evaluated by an
include appliance burners, burner ignitions and electrical approved agency. (See also “Manufacturer’s designation”
switching devices. and “Mark.”)
[RB] IMPACT PROTECTIVE SYSTEM. Construction [RB] LABELED. Equipment, materials or products to which
that has been shown by testing to withstand the impact of test have been affixed a label, seal, symbol or other identifying
missiles and that is applied, attached, or locked over exterior mark of a nationally recognized testing laboratory, approved
glazing. agency or other organization concerned with product evalua-
[MP] INDIRECT SYSTEM. A solar thermal system in tion that maintains periodic inspection of the production of
which the gas or liquid in the solar collector loop circulates such labeled items and whose labeling indicates either that
between the solar collector and a heat exchanger and such gas the equipment, material or product meets identified standards
or liquid is not drained from the system or supplied to the or has been tested and found suitable for a specified purpose.
load during normal operation. For the definition applicable in Chapter 11, see Section
N1101.6.
[MP] INDIRECT WASTE PIPE. A waste pipe that dis-
charges into the drainage system through an air gap into a [RB] LIGHT-FRAME CONSTRUCTION. Construction
trap, fixture or receptor. whose vertical and horizontal structural elements are primar-

2018 INTERNATIONAL RESIDENTIAL CODE ® 19
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