Unless otherwise expressly stated, the following words and terms shall, for the purposes of this code, have the meanings indicated in this chapter.
Words used in the present tense include the future; words in the masculine gender include the feminine and neuter; the singular number includes the plural and the plural, the singular.
Where terms are not defined in this code such terms shall have meanings ascribed to them as in other code publications of the International Code Council.
Where terms are not defined through the methods authorized by this section, such terms shall have ordinarily accepted meanings such as the context implies.
. Signifies access that requires the removal of an access panel or similar removable obstruction.
. Signifies access without the necessity for removing a panel or similar obstruction.
stories in height, the use of which is customarily accessory to and incidental to that of the dwelling(s) and which is located on the same lot.. A structure not greater than 3,000 square feet (279 m2) in floor area, and not over two
. An extension or increase in floor area or height of a building or structure.
. Stone or masonry veneer secured and supported through the adhesion of an approved bonding material applied to an approved backing.
plumbing drainage system when a negative pressure develops in the piping. This device shall close by gravity and seal the terminal under conditions of zero differential pressure (no flow conditions) and under positive internal pressure.. A one-way valve designed to allow air into the
fixture, appliance or device drains indirectly into a receptor below the flood-level rim of the receptor, and above the trap seal.(DRAINAGE SYSTEM). An arrangement in which a discharge pipe from a
plenums by mechanical means.. A means of providing space conditioning utilizing movement of air through ducts or
shall include any apparatus installed in connection therewith.. A system that consists of heat exchangers, blowers, filters, supply, exhaust and return-air systems, and
. An insulation having an air permanence equal to or less than 0.02 L/s-m2 at 75 Pa pressure differential tested according to ASTM E 2178 or E 283.
repair or addition that requires a permit. Also, a change in a mechanical system that involves an extension, addition or change to the arrangement, type or purpose of the original installation that requires a permit.. Any construction or renovation to an existing structure other than
. Stone or masonry veneer secured with approved mechanical fasteners to an approved backing.
Supports.”. See “
. A term applied to valves or mechanical devices that eliminate siphonage.
. A device or apparatus that is manufactured and designed to utilize energy and for which this code provides specific requirements.
. The ratio of longest to shortest perpendicular dimensions, or for wall sections, the ratio of height to length.
story, complying with all of the following requirements:. A finished or unfinished area, not considered a
1. The occupiable floor area is at least 70 square feet (17 m2), in accordance with Section R304,
3. The occupiable space is enclosed by the roof assembly above, knee walls (if applicable) on the sides and the floor-ceiling assembly below.
. A reversal of flow in the drainage system.
. A device or means to prevent backflow.
venting to atmosphere internally loaded to a normally open position between two tightly closing shutoff valves and with means for testing for tightness of the checks and opening of relief means.. A backflow-prevention device consisting of two independently acting check valves, internally force loaded to a normally closed position and separated by an intermediate chamber (or zone) in which there is an automatic relief means of
potable water-supply piping from any sources other than its intended source. Backsiphonage is one type of backflow.. The flow of water or other liquids into the
water distribution system, which by being in excess of the pressure in the water supply mains causes a potential backflow condition.. Pressure created by any means in the
. A pressure less than or equal to 4.33 psi (29.88 kPa) or the pressure exerted by a 10-foot (3048 mm) column of water.
potable water-supply pipe due to a negative pressure in such pipe.. The flowing back of used or contaminated water from piping into a
basement and has an average below grade wall area that is 50 percent or more of the total opaque and non-opaque area of that enclosing side.. The opaque portion of a wall that encloses one side of a
. Three-second gust speed at 33 feet (10 058 mm) above the ground in Exposure C (see Section R301.2.1) as given in Figure R301.2(4)A.
fixtures, including or excluding a bidet, consisting of a water closet, lavatory, and bathtub or shower. Such fixtures are located together on the same floor level.. A group of
drainage fitting, designed to provide a change in direction of a drain pipe of less than the angle specified by the amount necessary to establish the desired slope of the line (see “Elbow” and “Sweep”).. A
appliance from which hot water is circulated for heating purposes and then returned to the boiler, and which operates at water pressures not exceeding 160 pounds per square inch gage (psig) (1102 kPa gauge) and at water temperatures not exceeding 250°F (121°C).. A self-contained
. A horizontal grouted element within masonry in which reinforcement is embedded.
. A straight line through the building plan that represents the location of the lateral resistance provided by the wall bracing.
braced wall line with structural sheathing applied to all sheathable surfaces including the areas above and below openings.. A
anchors. The panel's length meets the requirements of its particular bracing method, and contributes toward the total amount of bracing required along its braced wall line in accordance with Section R602.10.1.. A full-height section of wall constructed to resist in-plane shear loads through interaction of framing members, sheathing material and
Fixture branch, drainage.”. See “
Horizontal branch, drainage.”. See “
developed length, between the connections of horizontal branches to a drainage stack. Measurements are taken down the stack from the highest horizontal branch connection.. A vertical measurement of distance, 8 feet (2438 mm) or more in
appliance, absorption unit or burner expressed in British thermal units input per hour.. The listed maximum capacity of an
shall mean any one- and two-family dwelling or portion thereof, including townhouses, that is used, or designed or intended to be used for human habitation, for living, sleeping, cooking or eating purposes, or any combination thereof, and shall include accessory structures thereto.. Building
Existing building is a building erected prior to the adoption of this code, or one for which a legal building permit has been issued..
shall not extend, except as specifically provided by law.. The line established by law, beyond which a building
. The officer or other designated authority charged with the administration and enforcement of this code.
building drain and conveys its discharge to a public sewer, private sewer, individual sewage-disposal system or other point of disposal.. That part of the drainage system that extends from the end of the
basement walls, exterior walls, floor, roof and any other building element that enclose conditioned spaces.. The
. Two or more layers of felt cemented together and surfaced with a cap sheet, mineral aggregate, smooth coating or similar surfacing material.
structural insulated panel (SIP) construction. The cap plate is cut to match the panel thickness such that it overlaps the wood structural panel facing on both sides.. The top plate of the double top plates used in
. The clear vertical distance from the finished floor to the finished ceiling.
. A mixture of portland or blended cement, portland cement or blended cement and hydrated lime, masonry cement or plastic cement and aggregate and other approved materials as specified in this code.
flues, for the purpose of carrying gaseous products of combustion and air from a fuel-burning appliance to the outside atmosphere.. A primary vertical structure containing one or more
chimney for removing the products of combustion from fuel-burning, residential-type appliances producing combustion gases not in excess of 1,000°F (538°C) under normal operating conditions, but capable of producing combustion gases of 1,400°F (760°C) during intermittent forces firing for periods up to 1 hour. All temperatures shall be measured at the appliance flue outlet. Residential-type appliance chimneys include masonry and factory-built types.. An approved
vent that connects to a horizontal drainage branch and vents two traps to a maximum of eight traps or trapped fixtures connected into a battery.. A
. The exterior materials that cover the surface of the building envelope that is directly loaded by the wind.
. An accessible opening in the drainage system used for the removal of possible obstruction.
. A small room or chamber used for storage.
waste piping embodying the horizontal wet venting of one or more sinks, lavatories or floor drains by means of a common waste and vent pipe adequately sized to provide free movement of air above the flow line of the drain.. A specially designed system of
. Any material not defined as noncombustible.
equipment including air for fuel combustion, draft hood dilution and ventilation of the equipment enclosure.. The air provided to fuel-burning
[CE] Section N1101.9.. See
flue gases and water that condenses from air circulating through the cooling coil in air conditioning equipment.. The liquid that separates from a gas due to a reduction in temperature, e.g., water that condenses from
appliance that condenses water generated by the burning of fuels.. An
. Air treated to control its temperature, relative humidity or quality.
appliances capable of maintaining, through design or heat loss/gain, 68°F (20°C) during the heating season and/or 80°F (27°C) during the cooling season, or has a fixed opening directly adjacent to a conditioned area.. That area within a building provided with heating and/or cooling systems or
equipment or systems capable of maintaining, through design or heat loss/gain, 50°F (10°C) during the heating season and 85°F (29°C) during the cooling season, or communicates directly with a conditioned space. For mechanical purposes, an area, room or space being heated or cooled by any equipment or appliance.. For energy purposes, space within a building that is provided with heating and/or cooling
potable water that creates an actual hazard to the public health through poisoning or through the spread of disease by sewage, industrial fluids or waste.. An impairment of the quality of the
. A system-incorporating heating element in an enclosure in which air enters an opening below the heating element, is heated and leaves the enclosure through an opening located above the heating element.
structural insulated panel composed of foam plastic insulation, which provides the link between the two facing shells.. The light-weight middle section of the
. The ability of a material to withstand deterioration of its surface or its properties when exposed to its environment.
. Any connection between two otherwise separate piping systems whereby there may be a flow from one system to the other.
branch leading from a DWV system terminating at a developed length of 2 feet (610 mm) or more. Dead ends shall be prohibited except as an approved part of a rough-in for future connection.. A
walls, floors, roofs, ceilings, stairways, built-in partitions, finishes, cladding, and other similarly incorporated architectural and structural items, and fixed service equipment.. The weight of all materials of construction incorporated into the building, including but not limited to
Dalle glass or glazing material whose purpose is decorative or artistic, not functional; whose coloring, texture or other design qualities or components cannot be removed without destroying the glazing material; and whose surface, or assembly into which it is incorporated, is divided into segments.. A carved, leaded or
. The length of a pipeline measured along the center line of the pipe and fittings.
diaphragm” is used, it includes horizontal bracing systems.. A horizontal or nearly horizontal system acting to transmit lateral forces to the vertical resisting elements. When the term “
appliance with a sealed combustion system that draws all air for combustion from the outside atmosphere and discharges all flue gases to the outside atmosphere.. A fuel-burning
appliance or any component part and the atmosphere, that causes a continuous flow of air and products of combustion through the gas passages of the appliance to the atmosphere.. The pressure difference existing between the
vent or chimney because of its height, and the temperature difference between the flue gases and the atmosphere.. The pressure difference created by a
appliance, or a part of the vent connector from an appliance, which is designed to provide for the ready escape of the flue gases from the appliance in the event of no draft, backdraft or stoppage beyond the draft hood; prevent a backdraft from entering the appliance; and neutralize the effect of stack action of the chimney or gas vent on the operation of the appliance.. A device built into an
wastes in a building drainage system.. Any pipe that carries soil and water-borne
slope in the system. These fittings are made from a variety of both metals and plastics. The methods of coupling provide for required slope in the system (see “Durham fitting”).. A pipe fitting designed to provide connections in the drainage system that have provisions for establishing the desired
plenums, fans and accessory air-handling equipment and appliances. For definition applicable in Chapter 11, see Section N1101.9.. A continuous passageway for the transmission of air which, in addition to ducts, includes duct fittings, dampers,
drainage fitting for use in the Durham systems installations in which the joints are made with recessed and tapered threaded fittings, as opposed to bell and spigot lead/oakum or solvent/cemented or soldered joints. The tapping is at an angle (not 90 degrees) to provide for proper slope in otherwise rigid connections.. A special type of
waste systems where all piping is of threaded pipe, tube or other such rigid construction using recessed drainage fittings to correspond to the types of piping.. A term used to describe soil or
dwelling units used, intended, or designed to be built, used, rented, leased, let or hired out to be occupied, or that are occupied for living purposes.. Any building that contains one or two
. A single unit providing complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.
diameter of a circle and if the opening is not circular, the diameter of a circle of equivalent cross-sectional area. (This is applicable to air gap.). The minimum cross-sectional area at the point of water-supply discharge, measured or expressed in terms of
. An operable exterior window, door or similar device that provides for a means of escape and access for rescue in the event of an emergency.
vents, control devices and other components of systems other than appliances that are permanently installed and integrated to provide control of environmental conditions for buildings. This definition shall also include other systems specifically regulated in this code.. All piping, ducts,
slope generally separating two levels or gently sloping areas.. With respect to topographic wind effects, a cliff or steep
gray water and fluids having a Gosselin rating of 2 or more including ethylene glycol, hydrocarbon oils, ammonia refrigerants and hydrazine.. Soil, water or
. A device used for reducing air temperature by the process of evaporating water into an airstream.
plumbing system regulated by this code that was legally installed prior to the effective date of this code, or for which a permit to install has been issued.. Any
exterior wall cladding systems that consist of an insulation board attached either adhesively or mechanically, or both, to the substrate; an integrally reinforced base coat; and a textured protective finish coat.(EIFS). EIFS are nonstructural, nonload-bearing
EXTERIOR INSULATION AND FINISH SYSTEMS (EIFS) WITH DRAINAGE. An EIFS that incorporates a means of drainage applied over a water-resistive barrier.
grade wall that defines the exterior boundaries of a building. Includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and basement walls with an average below-grade wall area that is less than 50 percent of the total opaque and nonopaque area of that enclosing side.. An above-
exterior walls for the purpose of providing a weather-resistive barrier, insulation or for aesthetics, including but not limited to, veneers, siding, exterior insulation and finish systems, architectural trim and embellishments such as cornices, soffits, and fascias.. A material or assembly of materials applied on the exterior side of
wood structural panel facings that form the two outmost rigid layers of the structural insulated panel.. The
labeled chimney composed of factory-made components assembled in the field in accordance with the manufacturer's instructions and the conditions of the listing.. A listed and
Skylights, roof windows, vertical windows (whether fixed or moveable); opaque doors; glazed doors; glass block; and combination opaque/glazed doors. For definition applicable in Chapter 11, see Section N1101.9.
Fiber-cement siding products have either smooth or textured faces and are intended for exterior wall and related applications.. A manufactured, fiber-reinforcing product made with an inorganic hydraulic or calcium silicate binder formed by chemical reaction and reinforced with discrete organic or inorganic nonasbestos fibers, or both. Additives which enhance manufacturing or product performance are permitted.
fireblocking, installed to resist the free passage of flame to other areas of the building through concealed spaces.. Building materials or materials approved for use as
labeled fireplace and chimney system composed of factory-made components, and assembled in the field in accordance with manufacturer's instructions and the conditions of the listing.. A listed and
Masonry chimney. A field-constructed chimney composed of solid masonry units, bricks, stones or concrete.
chimney-connected solid-fuel-burning heater designed to be operated with the fire chamber doors in either the open or closed position.. A free-standing,
. The opening between the top of the firebox and the smoke chamber.
. Pressure-treated lumber and plywood that exhibit reduced surface burning characteristics and resist propagation of fire.
. A process where the wood raw material is treated with a fire-retardant formulation while undergoing creation as a finished product.
. A process for treating wood using an initial vacuum followed by the introduction of pressure above atmospheric.
. The distance measured from the building face to one of the following:
1. To the closest interior lot line; or
2. To the centerline of a street, an alley or public way; or
3. To an imaginary line between two buildings on the lot.
The distance shall be measured at a right angle from the face of the wall.
fixture or is used with an open or atmospheric discharge.. A fitting that controls the volume and/or directional flow of water and is either attached to or accessible from a
main water-distribution pipe (or secondary branch) serving a plumbing fixture grouping such as a bath, kitchen or laundry area to which two or more individual fixture branch pipes are connected.. The
plumbing fixtures, used to size DWV piping systems. The drainage fixture-unit value for a particular fixture depends on its volume rate of drainage discharge, on the time duration of a single drainage operation and on the average time between successive operations.. A measure of probable discharge into the drainage system by various types of
plumbing fixtures used to size water-piping systems. The water-supply fixture-unit value for a particular fixture depends on its volume rate of supply, on the time duration of a single supply operation and on the average time between successive operations.. A measure of the probable hydraulic demand on the water supply by various types of
. The propagation of flame over a surface.
. A comparative measure, expressed as a dimensionless number, derived from visual measurements of the spread of flame versus time for a material tested in accordance with ASTM E 84 or UL 723.
winders or combination thereof from one landing to another.. A continuous run of rectangular treads or
plumbing fixture for recess in the floor having a floor-level strainer intended for the purpose of the collection and disposal of waste water used in cleaning the floor and for the collection and disposal of accidental spillage to the floor.. A
furnace suspended from the floor of the space being heated, taking air for combustion from outside such space, and with means for lighting the appliance from such space.. A self-contained
Vent.”. See “
fixtures for flushing purposes.. A device integrated within an air accumulator vessel that is designed to discharge a predetermined quantity of water to
flushometer valve is a device that discharges a predetermined quantity of water to fixtures for flushing purposes and is actuated by direct water pressure.. A
. Foam plastic used in siding applications where the foam plastic is a component of the siding.
trim.. A plastic that is intentionally expanded by the use of a foaming agent to produce a reduced-density plastic containing voids consisting of open or closed cells distributed throughout the plastic for thermal insulating or acoustic purposes and that has a density less than 20 pounds per cubic foot (320 kg/m3) unless it is used as interior
handrails, ceiling beams, door trim and window trim and similar decorative or protective materials used in fixed applications.. Exposed foam plastic used as picture molds, chair rails, crown moldings, baseboards,
equipment to the point of fuel delivery.. All piping, tubing, valves and fittings used to connect fuel utilization
. A valve that in the full open position has an opening cross-sectional area equal to a minimum of 85 percent of the cross-sectional area of the connecting pipe.
appliance designed or arranged to discharge heated air into a conditioned space or through a duct or ducts.. A vented heating
fenestration, including the area of sash, curbing or other framing elements, that enclose conditioned space. Includes the area of glazed fenestration assemblies in walls bounding conditioned basements.. The interior surface area of all glazed
. A window or other opening located such that the sill height of the opening is not more than 44 inches (1118 mm) above or below the finished ground level adjacent to the opening.
Slope.”. See “
exterior walls. Where the finished ground level slopes away from the exterior walls, the reference plane shall be established by the lowest points within the area between the building and the lot line or, where the lot line is more than 6 feet (1829 mm) from the building between the structure and a point 6 feet (1829 mm) from the building.. A reference plane representing the average of the finished ground level adjoining the building at all
Waste discharged from lavatories, bathtubs, showers, clothes washers and laundry trays..
water distribution system where every water distribution pipe is interconnected so as to provide two or more paths to each fixture supply pipe.. A
exterior walls, including the area of all windows and doors installed therein.. The normal projection of all
heat pump. Included in this definition are closed loop systems in which the liquid is recirculated and open loop systems in which the liquid is drawn from a well or other source.. Piping buried in horizontal or vertical excavations or placed in a body of water for the purpose of transporting heat transfer liquid to and from a
. A building component or a system of building components located near the open sides of elevated walking surfaces that minimizes the possibility of a fall from the walking surface to the lower level.
. Any room or rooms used or intended to be used by one or more guests for living or sleeping purposes.
. A horizontal or sloping rail intended for grasping by the hand for guidance or support.
Supports.”. See “
. Any location considered to be a fire hazard for flammable vapors, dust, combustible fibers or other highly combustible substances.
appliance having heating or heating/cooling capability and that uses refrigerants to extract heat from air, liquid or other sources.. An
(HDD). The sum, on an annual basis, of the difference between 65°F (18°C) and the mean temperature for each day as determined from “NOAA Annual Degree Days to Selected Bases Derived from the 1960-1990 Normals” or other weather data sources acceptable to the code official.
grade plane to the average height of the highest roof surface.. The vertical distance from
story, from the top of the floor finish to the top of the ceiling joists or, where there is not a ceiling, to the top of the roof rafters.. The vertical distance from top to top of two successive tiers of beams or finished floor surfaces; and, for the topmost
chimney complying with the requirements of UL 103. A Type H.T. chimney is identifiable by the markings “Type H.T.” on each chimney pipe section.. A high temperature
. With respect to topographic wind effects, a land surface characterized by strong relief in any horizontal direction.
drain pipe extending laterally from a soil or waste stack or building drain, that receives the discharge from one or more fixture drains.. A
. Any pipe or fitting that makes an angle of less than 45 degrees (0.79 rad) with the horizontal.
. Water at a temperature greater than or equal to 110°F (43°C).
basic wind speed is greater than 90 miles per hour (40 m/s), and Hawaii, Puerto Rico, Guam, Virgin Islands, and America Samoa.. Areas vulnerable to hurricanes, defined as the U.S. Atlantic Ocean and Gulf of Mexico coasts where the
appliances utilize electrolysis, reformation, chemical, or other processes to generate hydrogen.. A self-contained package or factory-matched packages of integrated systems for generating gaseous hydrogen. Hydrogen generating
appliance burners, burner ignitions and electrical switching devices.. A flame, spark or hot surface capable of igniting flammable vapors or fumes. Such sources include
waste pipe that discharges into the drainage system through an air gap into a trap, fixture or receptor.. A
sewage by means of a septic tank or mechanical treatment, designed for use apart from a public sewer to serve a single establishment or building.. A system for disposal of
vent a single-fixture drain that connects with the vent system above or terminates independently outside the building.. A pipe installed to
. A supply other than an approved public water supply that serves one or more families.
concrete forming system using stay-in-place forms of rigid foam plastic insulation, a hybrid of cement and foam insulation, a hybrid of cement and wood chips, or other insulating material for constructing cast-in-place concrete walls.(ICF). A
. The governmental unit that has adopted this code under due legislative authority.
approved agency and that indicates that the representative sample of the product or material has been tested and evaluated by an approved agency. (See also “Manufacturer's designation” and “Mark.”). An identification applied on a product by the manufacturer which contains the name of the manufacturer, the function and performance characteristics of the product or material, and the name and identification of an
Equipment, materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory, inspection agency or other organization concerned with product evaluation that maintains periodic inspection of the production of the above-labeled items and whose labeling indicates either that the equipment, material or product meets identified standards or has been tested and found suitable for a specified purpose..
. A type of construction whose vertical and horizontal structural elements are primarily formed by a system of repetitive wood or cold-formed steel framing members.
Equipment, materials, products or services included in a list published by an organization acceptable to the code official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment, material, product or service meets identified standards or has been tested and found suitable for a specified purpose..
. Those loads produced by the use and occupancy of the building or other structure and do not include construction or environmental loads such as wind load, snow load, rain load, earthquake load, flood load or dead load.
dwelling unit utilized for living, sleeping, eating, cooking, bathing, washing and sanitation purposes.. Space within a
dwelling where one or more occupants are primarily permanent in nature, and rent is paid for guestrooms.. A one-family
LOT. A portion or parcel of land considered as a unit.
. A line dividing one lot from another, or from a street or any public place.
sump with macerating pump and with connections for a water closet and other plumbing fixtures, that is designed to accept, grind and pump wastes to an approved point of discharge.. A system comprised of a
branches may be connected.. The principal pipe artery to which
main is fitted with multiple branches in close proximity in which water is distributed separately to fixtures from each branch.. A fabricated piping arrangement in which a large supply
Manufactured home means a structure, transportable in one or more sections, which in the traveling mode is 8 body feet (2438 body mm) or more in width or 40 body feet (12 192 body mm) or more in length, or, when erected on site, is 320 square feet (30 m2) or more, and which is built on a permanent chassis and designed to be used as a dwelling with or without a permanent foundation when connected to the required utilities, and includes the plumbing, heating, air-conditioning and electrical systems contained therein; except that such term shall include any structure that meets all the requirements of this paragraph except the size requirements and with respect to which the manufacturer voluntarily files a certification required by the secretary (HUD) and complies with the standards established under this title. For mobile homes built prior to June 15, 1976, a label certifying compliance to the Standard for Mobile Homes, NFPA 501, in effect at the time of manufacture is required. For the purpose of these provisions, a mobile home shall be considered a manufactured home..
Label.”). An identification applied on a product by the manufacturer indicating that a product or material complies with a specified standard or set of rules. (See also “Mark” and “
equipment as part of the conditions of listing and labeling.. Printed instructions included with
masonry heater is a solid fuel burning heating appliance constructed predominantly of concrete or solid masonry having a mass of at least 1,100 pounds (500 kg), excluding the chimney and foundation. It is designed to absorb and store a substantial portion of heat from a fire built in the firebox by routing exhaust gases through internal heat exchange channels in which the flow path downstream of the firebox includes at least one 180-degree (3.14-rad) change in flow direction before entering the chimney and which deliver heat by radiation through the masonry surface of the heater.. A
solid masonry units laid contiguously with the joints between the units filled with mortar.. Masonry consisting of
glass block or concrete block conforming to the requirements specified in Section 2103 of the International Building Code.. Brick, tile, stone,
. A building unit or block larger in size than 12 inches by 4 inches by 4 inches (305 mm by 102 mm by 102 mm) made of cement and suitable aggregates.
glass units bonded by mortar.. Nonload-bearing masonry composed of
masonry unit whose net cross-sectional area in any plane parallel to the loadbearing surface is less than 75 percent of its gross cross-sectional area measured in the same plane.. A
masonry unit whose net cross-sectional area in every plane parallel to the loadbearing surface is 75 percent or more of its cross-sectional area measured in the same plane.. A
concrete walls having a mass greater than or equal to 30 pounds per square foot (146 kg/m2), solid wood walls having a mass greater than or equal to 20 pounds per square foot (98 kg/m2), and any other walls having a heat capacity greater than or equal to 6 Btu/ft2 • °F [266 J/(m2 • K)].. Masonry or
shall be used for roof angle of less than or equal to 10 degrees (0.18 rad).. The average of the roof eave height and the height to the highest point on the roof surface, except that eave height
venting system designed to remove flue or vent gases by mechanical means, that consists of an induced draft portion under nonpositive static pressure or a forced draft portion under positive static pressure.. A
venting system using a fan or other mechanical means to cause the removal of flue or vent gases under positive static pressure.. A portion of a
venting system using a fan or other mechanical means to cause the removal of flue or vent gases under nonpositive static vent pressure.. A portion of a
venting system using a fan or other mechanical means to cause the removal of flue or vent gases under positive static vent pressure.. A portion of a
. A system for removing air from a room or space by mechanical means.
. An interlocking metal sheet having a minimum installed weather exposure of at least 3 square feet (0.28 m2) per sheet.
. An interlocking metal sheet having an installed weather exposure less than 3 square feet (0.28 m2) per sheet.
story with an aggregate floor area of not more than one-third of the area of the room or space in which the level or levels are located.. An intermediate level or levels between the floor and ceiling of any
shall be fully adhered or mechanically attached to the substrate or held in place with an approved ballast layer.. One or more layers of polymer modified asphalt sheets. The sheet materials
. Two or more single station alarm devices that are capable of interconnection such that actuation of one causes all integral or separate audible alarms to operate.
venting system designed to remove flue or vent gases under nonpositive static vent pressure entirely by natural draft.. A
. The heartwood of the following species with the exception that an occasional piece with corner sapwood is permitted if 90 percent or more of the width of each side on which it occurs is heartwood.
. Redwood, cedar, black locust and black walnut.
. Alaska yellow cedar, redwood, Eastern red cedar and Western red cedar including all sapwood of Western red cedar.
. Materials that pass the test procedure for defining noncombustibility of elementary materials set forth in ASTM E 136.
. The total area of all buildings or structures on any lot or parcel of ground projected on a horizontal plane, excluding permitted projections as allowed by this code.
. A combination of fittings that makes two changes in direction bringing one section of the pipe out of line but into a line parallel with the other section.
. Any person, agent, firm or corporation having a legal or equitable interest in the property.
exterior wall to direct water to the exterior and is premanufactured, fabricated, formed or applied at the job site.. Corrosion-resistant flashing at the base of an opening that is integrated into the building
appliance equipped with a fuel feed mechanism for burning processed pellets of solid fuel of a specified size and composition.. A closed combustion, vented
jurisdiction that authorizes performance of a specified activity.. An official document or certificate issued by the authority having
. An individual, heirs, executors, administrators or assigns, and also includes a firm, partnership or corporation, its or their successors or assigns, or the agent of any of the aforesaid.
roof covering composed of flat-plate photovoltaic modules fabricated into shingles.. A
Slope.”. See “
occupied space being conditioned.. A chamber that forms part of an air-circulation system other than the
plumbing refers to those installations, repairs, maintenance and alterations regulated by Chapters 25 through 33.. For the purpose of this code,
appliance with plumbing connections, such as a dishwasher, food-waste grinder, clothes washer or water heater.. An energized household
plumbing system and demands no additional water supply nor adds any discharge load to the system. It is presumed that it performs some useful function in the operation, maintenance, servicing, economy or safety of the plumbing system. Examples include filters, relief valves and aerators.. A device or assembly that is an adjunct to the basic
water supply system or discharges to a drainage system or both. Such receptacles or devices require a supply of water; or discharge liquid waste or liquid-borne solid waste; or require a supply of water and discharge waste to a drainage system.. A receptacle or device that is connected to a
plumbing fixtures, supports and appurtenances; soil, waste and vent pipes; sanitary drains and building sewers to an approved point of disposal.. Includes the water supply and distribution pipes,
potable water to a degree that does not create a hazard to the public health but that does adversely and unreasonably affect the aesthetic qualities of such potable water for domestic use.. An impairment of the quality of the
appliance utilizes a cord and plug connection to a grid-isolated load and has an integral fuel supply.. A fuel cell generator of electricity, which is not fixed in place. A portable-fuel-cell
roof deck, and additional slope has been provided to ensure drainage of the roof within 48 hours of precipitation.. The drainage condition in which consideration has been made for all loading deflections of the
concrete element cast elsewhere than its final position in the structure.. A structural
precast concrete wall panels that are designed to withstand specified stresses and used to build below-grade foundations.. Preengineered,
. A pressure-actuated valve held closed by a spring or other means and designed to automatically relieve pressure at the pressure at which it is set.
. A common sewer directly controlled by public authority.
. A water-supply pipe for public use controlled by public authority.
. Any street, alley or other parcel of land open to the outside air leading to a public street, which has been deeded, dedicated or otherwise permanently appropriated to the public for public use and that has a clear width and height of not less than 10 feet (3048 mm).
. To clear of air, gas or other foreign substances.
. A valve or faucet that closes automatically when released manually or controlled by mechanical means for fast-action closing.
R-VALUE, THERMAL RESISTANCE. The inverse of the time rate of heat flow through a building thermal envelope element from one of its bounding surfaces to the other for a unit temperature difference between the two surfaces, under steady state conditions, per unit area (h • ft2 • °F/Btu).
. A substance used to produce refrigeration by its expansion or evaporation.
refrigerant vapor.. A specific machine, with or without accessories, for compressing a given
refrigerant is circulated for the purpose of extracting, then rejecting, heat. A direct refrigerating system is one in which the evaporator or condenser of the refrigerating system is in direct contact with the air or other substances to be cooled or heated. An indirect refrigerating system is one in which a secondary coolant cooled or heated by the refrigerating system is circulated to the air or other substance to be cooled or heated.. A combination of interconnected parts forming a closed circuit in which
jurisdiction in which the project is to be constructed.. An individual who is registered or licensed to practice their respective design profession as defined by the statutory requirements of the professional registration laws of the state or
. A device to prevent excessive buildup of vacuum in a pressure vessel.
existing building for the purpose of its maintenance. For definition applicable in Chapter 11, see Section N1101.9.. The reconstruction or renewal of any part of an
conditioned space or location and recirculated or exhausted.. Air removed from an approved
hill characterized by strong relief in two directions.. With respect to topographic wind effects, an elongated crest of a
1. The vertical component of a step or stair.
2. A water pipe that extends vertically one full story or more to convey water to branches or to a group of fixtures.
roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof deck, vapor retarder, substrate or thermal barrier, insulation, vapor retarder, and roof covering.. A system designed to provide weather protection and resistance to design loads. The system consists of a
roof deck for weather resistance, fire classification or appearance.. The covering applied to the
. Reconstruction or renewal of any part of an existing roof for the purposes of its maintenance.
. An enclosed structure on or above the roof of any part of a building.
appliance installed in the space being heated and not connected to ducts.. A freestanding heating
plumbing system that must be completed prior to the installation of fixtures. This includes DWV, water supply and built-in fixture supports.. The installation of all parts of the
masonry units such that head joints in successive courses are horizontally offset at least one-quarter the unit length.. The placement of
sewage and excludes storm, surface and groundwater.. A sewer that carries
drain from a roof.. An opening in a wall or parapet that allows water to
(SDC). A classification assigned to a structure based on its occupancy category and the severity of the design earthquake ground motion at the site.
receptor that receives the discharge of a building sanitary drainage system and is constructed so as to separate solids from the liquid, digest organic matter through a period of detention, and allow the liquids to discharge into the soil outside of the tank through a system of open joint or perforated piping or a seepage pit.. A water-tight
waste containing animal matter, vegetable matter or other impurity in suspension or solution.. Any liquid
. The term, when used in the code, is construed as mandatory.
walls that are designed and constructed to resist racking from seismic and wind by use of masonry, concrete, cold-formed steel or wood framing in accordance with Chapter 6 of this code and the associated limitations in Section R301.2 of this code.. A general term for
vent connecting to the drain pipe through a fitting at an angle less than 45 degrees (0.79 rad) to the horizontal.. A
. A roofing membrane that is field applied using one layer of membrane material (either homogeneous or composite) rather than multiple layers.
equipment and alarm sounding device in one unit that is operated from a power supply either in the unit or obtained at the point of installation.. An assembly incorporating the detector, control
fixture traps. The joint tightness is obtained by compressing a friction-type washer such as rubber, nylon, neoprene, lead or special packing material against the pipe by the tightening of a (slip) nut.. A mechanical-type joint used primarily on
pitch) of a line of pipe in reference to a horizontal plane. In drainage, the slope is expressed as the fall in units vertical per units horizontal (percent) for a length of pipe.. The fall (
. A comparative measure, expressed as a dimensionless number, derived from measurements of smoke obscuration versus time for a material tested in accordance with ASTM E 84 or UL 723.
sewage containing fecal material.. A pipe that conveys
masonry units where the net cross-sectional area of each unit in any plane parallel to the bearing surface is not less than 75 percent of its gross cross-sectional area. Solid masonry units shall conform to ASTM C 55, C 62, C 73, C 145 or C 216.. Load-bearing or nonload-bearing construction using
wood structural panel cut from the same material used for the panel facings, used to connect two structural insulated panels. The strip (spline) fits into a groove cut into the vertical edges of the two structural insulated panels to be joined. Splines are used behind each facing of the structural insulated panels being connected as shown in Figure R613.8.. A strip of
main vertical DWV line, including offsets, that extends one or more stories as directly as possible to its vent terminal.. Any
masonry units in a bond pattern is such that head joints in successive courses are vertically aligned. For the purpose of this code, requirements for stack bond shall apply to all masonry laid in other than running bond.. The placement of
flights of stairs, either interior or exterior, with the necessary landings and platforms connecting them to form a continuous and uninterrupted passage from one level to another within or attached to a building, porch or deck.. One or more
. A self-contained package or factory-matched packages which constitute an automatically-operated assembly of integrated systems for generating useful electrical energy and recoverable thermal energy that is permanently connected and fixed in place.
. That portion of a building included between the upper surface of a floor and the upper surface of the floor or roof next above.
story having its finished floor surface entirely above grade plane, or in which the finished surface of the floor next above is:. Any
1. More than 6 feet (1829 mm) above grade plane; or
2. More than 12 feet (3658 mm) above the finished ground level at any point.
. Structural members manufactured using wood elements bonded together with exterior adhesives.
Examples of structural composite lumber are:
(LVL). A composite of wood veneer elements with wood fibers primarily oriented along the length of the member, where the veneer element thicknesses are 0.25 inches (6.4 mm) or less.
(PSL). A composite of wood strand elements with wood fibers primarily oriented along the length of the member, where the least dimension of the wood strand elements is 0.25 inch (6.4 mm) or less and their average lengths are a minimum of 300 times the least dimension of the wood strand elements.
(LSL). A composite of wood strand elements with wood fibers primarily oriented along the length of the member, where the least dimension of the wood strand elements is 0.10 inch (2.54 mm) or less and their average lengths are a minimum of 150 times the least dimension of the wood strand elements.
(OSL). A composite of wood strand elements with wood fibers primarily oriented along the length of the member, where the least dimension of the wood strand elements is 0.10 inch (2.54 mm) or less and their average lengths are a minimum of 75 times and less than 150 times the least dimension of the wood strand elements.
. That which is built or constructed.
drain that collects subsurface water or seepage water and conveys such water to a place of disposal.. A
sewage or waste, located below the normal grade of the gravity system and that must be emptied by mechanical means.. A tank or pit that receives
sump. These pumps are used for removing storm water only. The pump is selected for the specific head and volume of the load and is usually operated by level controllers.. A pump installed to empty a
story structure attached to a dwelling with a glazing area in excess of 40 percent of the gross area of the structure's exterior walls and roof. For definition applicable in Chapter 11, see Section N1101.9.. A one-
conditioned space through ducts or plenums from the heat exchanger of a heating, cooling or ventilating system.. Air delivered to a
drainage fitting designed to provide a change in direction of a drain pipe of less than the angle specified by the amount necessary to establish the desired slope of the line. Sweeps provide a longer turning radius than bends and a less turbulent flow pattern (see “Bend” and “Elbow”).. A
TEMPERATURE- AND PRESSURE-RELIEF (T AND P) VALVE. A combination relief valve designed to function as both a temperature-relief and pressure-relief valve.
. A temperature-actuated valve designed to discharge automatically at the temperature at which it is set.
Section R318.1, naturally durable termite-resistant wood, steel, concrete, masonry or other approved material.. Pressure-preservative treated wood in accordance with the AWPA standards in
conditioned space(s) consisting of existing or new walls, doors and/or windows. The conditioned space(s) shall be controlled as separate zones for heating and cooling or conditioned by separate equipment. For definition applicable in Chapter 11, see Section N1101.9.. Physical and space conditioning separation from
THERMAL RESISTANCE, R-VALUE. The inverse of the time rate of heat flow through a body from one of its bounding surfaces to the other for a unit temperature difference between the two surfaces, under steady state conditions, per unit area (h • ft2 • °F/Btu) (m2 • K)/W.
THERMAL TRANSMITTANCE, U-FACTOR. The coefficient of heat transmission (air to air) through a building envelope component or assembly, equal to the time rate of heat flow per unit area and unit temperature difference between the warm side and cold side air films (Btu/h • ft2 • °F) W/(m2 • K).
approved agency operating a product or material certification system that incorporates initial product testing, assessment and surveillance of a manufacturer's quality control system.. An
third-party certification agency. Assertion of certification is in the form of identification in accordance with the requirements of the third-party certification agency.. Certification obtained by the manufacturer indicating that the function and performance characteristics of a product or material have been determined by testing and ongoing surveillance by an approved
. Procedure by which an approved testing laboratory provides documentation that a product material or system conforms to specified requirements.
dwelling unit constructed in a group of three or more attached units in which each unit extends from foundation to roof and with a yard or public way on at least two sides.. A single-family
fixture, that provides a liquid seal to prevent the emission of sewer gases without materially affecting the flow of sewage or waste water through it.. A fitting, either separate or built into a
trap, typically installed where infrequent use of the trap would result in evaporation of the trap seal, such as floor drains.. A device or system of piping to maintain a water seal in a
trap seal is the maximum vertical depth of liquid that a trap will retain, measured between the crown weir and the top of the dip of the trap.. The
handrails, door and window frames, and similar decorative or protective materials used in fixed applications.. Picture molds, chair rails, baseboards,
. The graphic depiction of an individual truss, which describes the design and physical characteristics of the truss.
labeled vent conforming to UL 641 for venting oil-burning appliances listed for use with Type L vents or with gas appliances listed for use with Type B vents.. A listed and
. A device which prevents back-siphonage of water by admitting atmospheric pressure through ports to the discharge side of the device.
Vapor retarder class shall be defined using the desiccant method with Procedure A of ASTM E 96 as follows:. A measure of the ability of a material or assembly to limit the amount of moisture that passes through that material or assembly.
Class I: 0.1 perm or less
Class II: 0.1 < perm ≤ 1.0 perm
Class III: 1.0 < perm ≤ 10 perm
venting system, in the outlet of an individual, automatically operated fuel burning appliance and that is designed to open the venting system automatically when the appliance is in operation and to close off the venting system automatically when the appliance is in a standby or shutdown condition.. A device intended for installation in the
appliances, plus excess air and dilution air, in the venting system above the draft hood or draft regulator.. Products of combustion from fuel-burning
vent pipe installed to provide circulation of air to and from the drainage system and which extends through one or more stories.. A vertical
trap seal loss or blow-back due to siphonage or back pressure.. Piping installed to equalize pneumatic pressure in a drainage system to prevent
. Removal of combustion products to the outdoors.
flue collar of an appliance to the outside atmosphere for the purpose of removing flue or vent gases. A venting system is usually composed of a vent or a chimney and vent connector, if used, assembled to form the open passageway.. A continuous open passageway from the
. Any pipe or fitting that makes an angle of 45 degrees (0.79 rad) or more with the horizontal.
exterior walls of buildings.. A shaped material, made principally from rigid polyvinyl chloride (PVC), that is used to cover
. A wall not laterally supported at the top, that resists lateral soil load and other imposed loads.
. A wall supporting any vertical load in addition to its own weight.
. A wall which does not support vertical loads other than its own weight.
waste that is free of fecal matter.. Liquid-borne
sewage not containing fecal material.. Piping that conveys only liquid
plumbing fixtures, appliances, appurtenances, equipment, devices or other systems served, including fittings and control valves.. Piping which conveys water from the service to the
appliance or equipment that heats potable water and supplies such water to the potable hot water distribution system.. Any heating
. A water supply pipe for public use.
potable water system supplying water to a plumbing fixture or plumbing appliance that requires either an air gap or backflow prevention device for protection of the supply system.. A valved discharge opening, including a hose bibb, through which water is removed from the
exterior wall covering that is intended to resist liquid water that has penetrated behind the exterior covering from further intruding into the exterior wall assembly.. A material behind an
water main or other source of potable water supply to the water distribution system inside the building, terminating at the service valve.. The outside pipe from the
water service pipe, the water-distributing pipes and the necessary connecting pipes, fittings, control valves and all appurtenances in or adjacent to the building or premises.. The
. A tread with nonparallel edges.
. A composite material made primarily from wood or cellulose-based materials and plastic.
wood structural panels are plywood, OSB or composite panels.. A panel manufactured from veneers; or wood strands or wafers; bonded together with waterproof synthetic resins or other suitable bonding systems. Examples of
court, unobstructed from the ground to the sky, except where specifically provided by this code, on the lot on which a building is situated.. An open space, other than a