WSR 97-03-017
PERMANENT RULES
BUILDING CODE COUNCIL
[Filed January 7, 1997, 8:40 a.m., effective July 1, 1997]
Date of Adoption: December 4, 1996.
Purpose: To exempt unstaffed equipment shelters used solely for personal wireless service facilities from the building envelope insulation requirements of the Washington State Energy Code (chapter 51-11 WAC) in response to ESHB 2828.
Citation of Existing Rules Affected by this Order: Amending chapter 51-11 WAC, Washington State Energy Code, Sections 1210 and 1301.
Statutory Authority for Adoption: RCW 19.27.074, 19.27A.020, and 19.27A.025.
Adopted under notice filed as WSR 96-21-105 on October 21, 1996.
Changes Other than Editing from Proposed to Adopted Version: A correction was made in Exception 3 of Section 1301 to update an occupancy classification that was changed in the Uniform Building Code in 1994 but not reflected in this code.
Number of Sections Adopted in Order to Comply with Federal Statute: New 0, amended 0, repealed 0; Federal Rules or Standards: New 0, amended 0, repealed 0; or Recently Enacted State Statutes: New 0, amended 0, repealed 0.
Number of Sections Adopted at Request of a Nongovernmental Entity: New 0, amended 0, repealed 0.
Number of Sections Adopted on the Agency's own Initiative: New 0, amended 0, repealed 0.
Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 0, amended 0, repealed 0.
Number of Sections Adopted using Negotiated Rule Making: New 0, amended 2, repealed 0; Pilot Rule Making: New 0, amended 0, repealed 0; or Other Alternative Rule Making: New 0, amended 0, repealed 0.
Effective Date of Rule: July 1, 1997.
December 4, 1996
James R. Beaver
Chair
AMENDATORY SECTION (Amending WSR 93-21-052, filed 10/18/93, effective
4/1/94)
WAC 51-11-1210 Application of terms. For the purposes of this
Code, certain abbreviations, terms, phrases, words and their derivatives,
shall be as set forth in this chapter. Where terms are not defined, they
shall have their ordinary accepted meanings within the context with which
they are used. In the event there is a question about the definition of
a term, the definitions for terms in the Codes enumerated in RCW
19.27.031 and the edition of Webster's dictionary referenced therein
shall be considered as the sources for providing ordinarily accepted
meanings.
AAMA: American Architectural Manufacturers Association.
ADDITION: See the Washington State Building Code.
ADVANCED FRAMED CEILING: Advanced framing assumes full and even depth
of insulation extending to the outside edge of exterior walls. (See
Standard Framing and Section 2007.2 of this Code.)
ADVANCED FRAMED WALLS: Studs framed on twenty-four inch centers with
double top plate and single bottom plate. Corners use two studs or other
means of fully insulating corners, and one stud is used to support each
header. Headers consist of double 2X material with R-10 insulation
between the header and exterior sheathing. Interior partition
wall/exterior wall intersections are fully insulated in the exterior
wall. (See Standard Framing and Section 2005.2 of this Code.)
AFUE - ANNUAL FUEL UTILIZATION EFFICIENCY: Unlike steady state
conditions, this rating is based on average usage including on and off
cycling as set out in the standardized Department of Energy Test
Procedures.
AIR CONDITIONING, COMFORT: The process of treating air to control
simultaneously its temperature, humidity, cleanliness and distribution
to meet requirements of the conditioned space.
ARI: Air Conditioning and Refrigeration Institute.
ASHRAE: American Society of Heating, Refrigerating and Air Conditioning
Engineers, Inc.
ASTM: American Society for Testing and Materials.
AUTOMATIC: Self-acting, operating by its own mechanism when actuated by
some impersonal influence, as for example, a change in current strength,
pressure, temperature or mechanical configuration. (See Manual.)
BELOW GRADE WALLS: Walls or the portion of walls which are entirely
below the finished grade or which extend two feet or less above the
finish grade.
BOILER CAPACITY: The rate of heat output in Btu/h measured at the boiler
outlet, at the design inlet and outlet conditions and rated fuel/energy
input.
BUILDING ENVELOPE: The elements of a building which enclose conditioned
spaces through which thermal energy may be transferred to or from the
exterior, or to or from unconditioned spaces, or to or from semi-heated
spaces, or to or from spaces exempted by the provisions of Section 1301.
BUILDING, EXISTING: See the Washington State Building Code.
BUILDING OFFICIAL: The official authorized to act in behalf of a
jurisdiction code enforcement agency or its authorized representative.
BUILDING PROJECT: A building or group of buildings, including on-site
energy conversion or electric-generating facilities, which utilize a
single submittal for a construction permit or are within the boundary of
a contiguous area under one ownership.
CONDITIONED FLOOR AREA: (See Gross Conditioned Floor Area.)
CONDITIONED SPACE: A cooled space, heated space (fully heated), heated
space (semi-heated), or indirectly conditioned space.
COOLED SPACE: An enclosed space within a building that is cooled by a cooling system whose sensible capacity
a. exceeds 5 Btu/(hft2), or
b. is capable of maintaining space dry bulb temperature of 90
degrees F or less at design cooling conditions.
COP - COEFFICIENT OF PERFORMANCE: The ratio of the rate of net heat
output (heating mode) or heat removal (cooling mode) to the rate of total
on-site energy input to the heat pump, expressed in consistent units and
under designated rating conditions. (See Net Heat Output, Net Heat
Removal, Total On-Site Energy Input.)
DAYLIGHTED ZONE:
a. Under overhead glazing: The area under overhead glazing whose horizontal dimension, in each direction, is equal to the overhead glazing dimension in that direction plus either the floor to ceiling height or the dimension to a ceiling height opaque partition, or one-half the distance to adjacent overhead or vertical glazing, whichever is least.
b. At vertical glazing: The area adjacent to vertical glazing
which receives daylighting from the glazing. For purposes of
this definition and unless more detailed daylighting analysis
is provided, the daylighting zone depth is assumed to extend
into the space a distance of 15 feet or to the nearest ceiling
height opaque partition, whichever is less. The daylighting
zone width is assumed to be the width of the window plus
either two feet on each side (the distance to an opaque
partition) or one-half the distance to adjacent overhead or
vertical glazing, whichever is least.
DAYLIGHT SENSING CONTROL (DS): A device that automatically regulates the
power input to electric lighting near the glazing to maintain the desired
workplace illumination, thus taking advantage of direct or indirect
sunlight.
DEADBAND: The temperature range in which no heating or cooling is used.
DESIGN COOLING CONDITIONS: The cooling outdoor design temperature from
the 0.5 percent column for summer from the Puget Sound Chapter of ASHRAE
publication "Recommended Outdoor Design Temperatures, Washington State,
ASHRAE."
DESIGN HEATING CONDITIONS: The heating outdoor design temperature from
the 0.6 percent column for winter from the Puget Sound Chapter of ASHRAE
publication "Recommended Outdoor Design Temperatures, Washington State,
ASHRAE."
DOOR AREA: Total area of door measured using the rough opening and
including the door and frame.
DOOR: All operable opening areas, which are not glazing, in the building
envelope including swinging and roll-up doors, fire doors, smoke vents
and access hatches.
DWELLING UNIT: See the Washington State Building Code.
EER - ENERGY EFFICIENCY RATIO: The ratio of net equipment cooling
capacity in Btu/h to total rate of electric input in watts under
designated operating conditions.
ECONOMIZER, AIR: A ducting arrangement and automatic control system
that allows a cooling supply fan system to supply outside air to reduce
or eliminate the need for mechanical refrigeration during mild or cold
weather.
ECONOMIZER, WATER: A system by which the supply air of a cooling system
is cooled directly, indirectly, or both, by evaporation of water or by
other appropriate fluid in order to reduce or eliminate the need for
mechanical refrigeration.
EFFICIENCY, HVAC SYSTEM: The ratio of useful energy (at the point of
use) to the energy input for a designated time period, expressed in
percent.
EMISSIVITY: The ability to absorb infrared radiation. A low emissivity
implies a higher reflectance of infrared radiation.
ENERGY: The capacity for doing work; taking a number of forms which may
be transformed from one into another, such as thermal (heat), mechanical
(work), electrical and chemical; in customary units, measured in
kilowatt-hours (Kwh) or British thermal units (Btu). (See New energy.)
ENERGY, RECOVERED: (See Recovered energy.)
EXTERIOR ENVELOPE: (See Building envelope.)
FACADE AREA: Vertical projected area including nonhorizontal roof area,
overhangs, cornices, etc. measured in elevation in a vertical plane
parallel to the plane of the building face.
FLOOR OVER UNCONDITIONED SPACE: A floor which separates a conditioned
space from an unconditioned space which is buffered from exterior ambient
conditions including vented crawl spaces and unconditioned basements or
other similar spaces, or exposed to exterior ambient conditions including
open parking garages and enclosed garages which are mechanically
ventilated.
F-FACTOR: The perimeter heat loss factor expressed in Btu/hft F.
F-VALUE: (See F-Factor.)
GLAZING: All areas, including the frames, in the shell of a conditioned
space that let in natural light including windows, clerestories,
skylights, sliding or swinging glass doors and glass block walls.
GLAZING AREA: Total area of the glazing measured using the rough
opening, and including the glazing, sash, and frame. For doors where the
daylight opening area is less than fifty percent of the door area, the
glazing area is the daylight opening area. For all other doors, the
glazing area is the door area.
GROSS CONDITIONED FLOOR AREA: The horizontal projection of that portion
of interior space which is contained within exterior walls and which is
conditioned directly or indirectly by an energy-using system, and which
has an average height of five feet or greater, measured from the exterior
faces.
GROSS EXTERIOR WALL AREA: The normal projection of the building envelope
wall area bounding interior space which is conditioned by an energy-using
system; includes opaque wall, vertical glazing and door areas. The gross
area of walls consists of all opaque wall areas, including foundation
walls, between floor spandrels, peripheral edges of floors, vertical
glazing areas, and door areas, where such surfaces are exposed to
exterior ambient conditions and enclose a conditioned space including
interstitial areas between two such spaces. (See Below Grade Wall.)
GROSS FLOOR AREA: The sum of the areas of the several floors of the
building, including basements, cellars, mezzanine and intermediate
floored tiers and penthouses of headroom height, measured from the
exterior faces of exterior walls or from the center line of walls
separating buildings, but excluding: Covered walkways, open roofed-over
areas, porches and similar spaces, pipe trenches, exterior terraces or
steps, chimneys, roof overhangs and similar features.
GROSS ROOF/CEILING AREA: A roof/ceiling assembly shall be considered as
all components of the roof/ceiling envelope through which heat flows,
thus creating a building transmission heat loss or gain, where such
assembly is exposed to exterior ambient conditions and encloses a
conditioned space. The assembly does not include those components that
are separated from a heated and/or cooled space by a vented airspace.
The gross area of a roof/ceiling assembly consists of the total interior
surface of such assembly, including overhead glazing.
GUEST ROOM: See the Washington State Building Code.
HEAT: The form of energy that is transferred by virtue of a temperature
difference.
HEAT STORAGE CAPACITY: The physical property of materials (mass) located
inside the building envelope to absorb, store, and release heat.
HEATED SPACE (FULLY HEATED): An enclosed space within a building, including adjacent connected spaces separated by an un-insulated component (e.g., basements, utility rooms, garages, corridors), which is heated by a heating system whose output capacity is
a. capable of maintaining a space dry-bulb temperature of 45 degrees F or greater at design heating conditions; or
b. 8 Btu/(hft2) or greater in Climate Zone 1 and 12 Btu/(h ft2)
or greater in Climate Zone 2.
HEATED SPACE (SEMI-HEATED): An enclosed space within a building, including adjacent connected spaces separated by an un-insulated component (e.g., basements, utility rooms, garages, corridors), which is heated by a heating system
a. whose output capacity is 3 Btu/(hft2) or greater in Climate Zone 1 and 5 Btu/(hft2) or greater in Climate Zone 2; and
b. is not a Heated Space (Fully Heated).
HSPF - HEATING SEASON PERFORMANCE FACTOR: The total heating output (in
Btu) of a heat pump during its normal annual usage period for heating
divided by the total (watt hour) electric power input during the same
period, as determined by test procedures consistent with the U.S.
Department of Energy "Test Procedure for Central Air Conditioners,
Including Heat Pumps" published in RS-30. When specified in Btu per watt
hour an HSPF of 6.826 is equivalent to a COP of 2.0.
HUMIDISTAT: A regulatory device, actuated by changes in humidity, used
for automatic control of relative humidity.
HVAC: Heating, ventilating and air conditioning.
HVAC SYSTEM COMPONENTS: HVAC system components provide, in one or more
factory-assembled packages, means for chilling and/or heating water with
controlled temperature for delivery to terminal units serving the
conditioned spaces of the buildings. Types of HVAC system components
include, but are not limited to, water chiller packages, reciprocating
condensing units and water source (hydronic) heat pumps. (See HVAC
system equipment.)
HVAC SYSTEM EFFICIENCY: (See Efficiency, HVAC system.)
HVAC SYSTEM EQUIPMENT: HVAC system equipment provides, in one (single
package) or more (split system) factory-assembled packages, means for air
circulation, air cleaning, air cooling with controlled temperature and
dehumidification; and optionally, either alone or in combination with a
heating plant, the functions of heating and humidifying. The cooling
function may be either electrically or heat operated and the refrigerant
condenser may be air, water or evaporatively cooled. Where the equipment
is provided in more than one package, the separate packages shall be
designed by the manufacturer to be used together. The equipment may
provide the heating function as a heat pump or by the use of electric
elements. (The word "equipment" used without modifying adjective may,
in accordance with common industry usage, apply either to HVAC system
equipment or HVAC system components.)
INDIRECTLY CONDITIONED SPACE: An enclosed space within a building that
is not a heated or cooled space, whose area weighted heat transfer
coefficient to heated or cooled spaces exceeds that to the outdoors or
to unconditioned spaces; or through which air from heated or cooled
spaces is transferred at a rate exceeding three air changes per hour.
Enclosed corridors between conditioned spaces shall be considered as
indirectly conditioned space. (See Heated Space, Cooled Space and
Unconditioned Space.)
INFILTRATION: The uncontrolled inward air leakage through cracks and
interstices in any building element and around windows and doors of a
building caused by the pressure effects of wind and/or the effect of
differences in the indoor and outdoor air density.
INSULATION BAFFLE: A rigid material, resistant to wind driven moisture,
the purpose of which is to allow air to flow freely into the attic or
crawl space and to prevent insulation from blocking the ventilation of
these spaces, or the loss of insulation. Example materials for this
purpose are sheet metal, or wax impregnated cardboard.
INSULATION POSITION:
a. Exterior Insulation Position: A wall having all or nearly all of its mass exposed to the room air with the insulation on the exterior of the mass.
b. Integral Insulation Position: A wall having mass exposed to both room and outside air, with substantially equal amounts of mass on the inside and outside of the insulation layer.
c. Interior Insulation Position: A wall not meeting either of
the above definitions; particularly a wall having most of its
mass external to the insulation layer.
IPLV - INTEGRATED PART-LOAD VALUE: A single number figure of merit based
on part-load EER or COP expressing part-load efficiency for air-conditioning and heat pump equipment on the basis of weighted operation
at various load capacities for the equipment as specified in the Air
Conditioning and Refrigeration Institute (ARI) and Cooling Tower
Institute (CTI) procedures.
LUMINAIRE: A complete lighting unit consisting of a lamp or lamps
together with the parts designed to distribute the light, to position and
protect the lamps and to connect the lamps to the electric power supply.
MANUAL: Capable of being operated by personal intervention.
(See Automatic.)
MICROCELL: A wireless communication facility consisting of an antenna
that is either: (a) Four (4) feet in height and with an area of not more
than five hundred eighty (580) square inches; or (b) if a tubular
antenna, no more than four (4) inches in diameter and no more than six
(6) feet in length; and the associated equipment cabinet that is six (6)
feet or less in height and no more than forty-eight (48) square feet in
floor area.
NFPA: National Fire Protection Association.
NFRC: National Fenestration Rating Council.
NET HEAT OUTPUT: The change in the total heat content of the air
entering and leaving the equipment (not including supplementary heat and
heat from boilers).
NET HEAT REMOVAL: The total difference in heat content of the air
entering and leaving the equipment (without heat) or the difference in
total heat content of the water or refrigerant entering and leaving the
component.
NEW ENERGY: Energy, other than recovered energy, utilized for the
purpose of heating or cooling. (See Energy.)
NOMINAL R-VALUE: The thermal resistance of insulation as specified by
the manufacturer according to recognized trade and engineering standards.
NONRENEWABLE ENERGY SOURCES: All energy sources that are not renewable
energy sources including natural gas, oil, coal, wood, liquified
petroleum gas, steam, and any utility-supplied electricity.
NONRESIDENTIAL: All buildings and spaces in the Uniform Building Code
(UBC) occupancies other than Group R.
OCCUPANCY: See the Washington State Uniform Building Code.
OCCUPANCY SENSOR: A device that detects occupants within an area,
causing any combination of lighting, equipment or appliances to be turned
on or shut off.
OPAQUE ENVELOPE AREAS: All exposed areas of a building envelope which
enclose conditioned space, except openings for doors, glazing and
building service systems.
OPEN BLOWN: Loose fill insulation pneumatically installed in an
unconfined attic space.
OUTDOOR AIR (OUTSIDE AIR): Air taken from the outdoors and, therefore,
not previously circulated through a building.
OVERHEAD GLAZING: A glazing surface that has a slope of less than sixty
degrees from the horizontal plane.
PACKAGED TERMINAL AIR CONDITIONER: A factory-selected combination of
heating and cooling components, assemblies or sections intended to serve
a room or zone. (For the complete technical definition, see Standard RS-10.)
PERMEANCE (PERM): The ability of a material of specified thickness to
transmit moisture in terms of amount of moisture transmitted per unit
time for a specified area and differential pressure (grains per
hourft2inches of HG). Permeance may be measured using ASTM E-96-72 or
other approved dry cup method as specified in RS-1.
PERSONAL WIRELESS SERVICE FACILITY: A Wireless Communication Facility
(WCF), including a microcell, which is a facility for the transmission
and/or reception of radio frequency signals and which may include
antennas, equipment shelter or cabinet, transmission cables, a support
structure to achieve the necessary elevation, and reception and/or
transmission devices or antennas.
POOL COVER: A vapor-retardant cover which lies on or at the surface of
the pool.
POWER: In connection with machines, the time rate of doing work. In
connection with the transmission of energy of all types, the rate at
which energy is transmitted; in customary units, it is measured in watts
(W) or British Thermal Units per hour (Btu/h).
PROCESS ENERGY: Energy consumed in support of a manufacturing,
industrial, or commercial process other than the maintenance of building
comfort or amenities for building occupants.
RADIANT FLOOR: A floor assembly, on grade or below, containing heated
pipes, ducts, or electric heating cables that constitute a floor or
portion thereof for complete or partial heating of the structure.
READILY ACCESSIBLE: See the Washington State Mechanical Code.
RECOOLING: The removal of heat by sensible cooling of the supply air
(directly or indirectly) that has been previously heated above the
temperature to which the air is to be supplied to the conditioned space
for proper control of the temperature of that space.
RECOVERED ENERGY: Energy utilized which would otherwise be wasted (i.e.,
not contribute to a desired end use) from an energy utilization system.
REHEAT: The application of sensible heat to supply air that has been
previously cooled below the temperature of the conditioned space by
either mechanical refrigeration or the introduction of outdoor air to
provide cooling.
RENEWABLE ENERGY SOURCES: Renewable energy sources (excluding minerals)
derived from: (1) incoming solar radiation, including but not limited
to, natural daylighting and photosynthetic processes; (2) energy sources
resulting from wind, waves and tides, lake or pond thermal differences;
and (3) energy derived from the internal heat of the earth, including
nocturnal thermal exchanges.
RESET: Adjustment of the set point of a control instrument to a higher
or lower value automatically or manually to conserve energy.
ROOF/CEILING ASSEMBLY: (See Gross Roof/Ceiling Area.)
SEER - SEASONAL ENERGY EFFICIENCY RATIO: The total cooling output of an
air conditioner during its normal annual usage period, in Btu's, divided
by the total electric energy input in watt-hours, during the same period,
as determined by 10 CFR, Part 430.
SEMI-HEATED SPACE: Sub-category of Heated Space. (See Heated Space.)
SEQUENCE: A consecutive series of operations.
SERVICE SYSTEMS: All energy-using systems in a building that are
operated to provide services for the occupants or processes housed
therein, including HVAC, service water heating, illumination,
transportation, cooking or food preparation, laundering or similar
functions.
SERVICE WATER HEATING: Supply of hot water for domestic or commercial
purposes other than comfort heating.
SHADED: Glazed area which is externally protected from direct solar
radiation by use of devices permanently affixed to the structure or by
an adjacent building, topographical feature, or vegetation.
SHADING COEFFICIENT: The ratio of solar heat gain occurring through non-opaque portions of the glazing, with or without integral shading devices,
to the solar heat gain occurring through an equivalent area of unshaded,
1/8-inch thick, clear, double-strength glass.
Note: Heat gains to be compared under the same conditions. See
Chapter 26 of Standard RS-27, listed in Chapter 17 of this
Code.
SHALL: Denotes a mandatory Code requirement.
SKYLIGHT: (See Overhead Glazing.)
SLAB-BELOW-GRADE: Any portion of a slab floor in contact with the ground
which is more than twenty-four inches below the final elevation of the
nearest exterior grade.
SLAB-ON-GRADE, EXTERIOR: Any portion of a slab floor in contact with the
ground which is less than or equal to twenty-four inches below the final
elevation of the nearest exterior grade.
SOLAR ENERGY SOURCE: Source of natural daylighting and of thermal,
chemical or electrical energy derived directly from conversion of
incident solar radiation.
SOLAR HEAT GAIN COEFFICIENT (SHGC): The ratio of the solar heat gain
entering the space through the glazing product to the incident solar
radiation. Solar heat gain includes directly transmitted solar heat and
absorbed solar radiation which is then reradiated, conducted, or
convected into the space.
SPLIT SYSTEM: Any heat pump or air conditioning unit which is provided
in more than one assembly requiring refrigeration piping installed in the
field.
STANDARD FRAMING: All framing practices not defined as "intermediate"
or "advanced" shall be considered standard. (See Advanced framed
ceiling, Advanced framed walls, Intermediate framed wall.)
SUBSTANTIAL CONTACT: A condition where adjacent building materials are
placed in a manner that proximal surfaces are contiguous, being installed
and supported as to eliminate voids between materials, without
compressing or degrading the thermal performance of either product.
SYSTEM: A combination of central or terminal equipment or components
and/or controls, accessories, interconnecting means, and terminal devices
by which energy is transformed so as to perform a specific function, such
as HVAC, service water heating or illumination.
TAPERING: Installation of a reduced level of ceiling insulation at the
eaves, due to reduced clearance.
THERMAL BY-PASS: An area where the envelope surrounding the conditioned
space is breached, or where an ineffective application compromises the
performance of a thermal or infiltration barrier, increasing the
structure's energy consumption by exposing finished surfaces to ambient
conditions and additional heat transfer.
THERMAL CONDUCTANCE (C): Time rate of heat flow through a body
(frequently per unit area) from one of its bounding surfaces to the other
for a unit temperature difference between the two surfaces, under steady
conditions (Btu/hft2F).
THERMAL RESISTANCE (R): The reciprocal of thermal conductance
(hft2F/Btu).
THERMAL TRANSMITTANCE (U): The coefficient of heat transmission (air to
air). It is the time rate of heat flow per unit area and unit
temperature difference between the warm side and cold side air films
(Btu/hft2F).
THERMAL TRANSMITTANCE, OVERALL (Uo): The overall (average) heat
transmission of a gross area of the exterior building envelope
(Btu/hft2F). The Uo-factor applies to the combined effect of the time
rate of heat flows through the various parallel paths, such as glazing,
doors and opaque construction areas, comprising the gross area of one or
more exterior building components, such as walls, floors or roof/ceiling.
THERMOSTAT: An automatic control device actuated by temperature and
designed to be responsive to temperature.
TOTAL ON-SITE ENERGY INPUT: The combination of all the energy inputs to
all elements and accessories as included in the equipment components,
including but not limited to, compressor(s), compressor sump heater(s),
circulating pump(s), purge devices, fan(s), and the HVAC system component
control circuit.
TRANSMISSION COEFFICIENT: The ratio of the solar heat gain through a
glazing system to that of an unshaded single pane of double strength
window glass under the same set of conditions.
U-FACTOR: (See Thermal Transmittance.)
U-VALUE: (See U-Factor.)
UNCONDITIONED SPACE: Space within a building that is not a conditioned
space. (See Conditioned Space).
UNIFORM BUILDING CODE: The Washington State Uniform Building Code as
modified by the Washington State Building Code Council.
UNIFORM MECHANICAL CODE: The Washington State Uniform Mechanical Code
as modified by the Washington State Building Code Council.
UNIFORM PLUMBING CODE (UPC): The Washington State Uniform Plumbing Code
as modified by the Washington State Building Code Council.
UNITARY COOLING AND HEATING EQUIPMENT: One or more factory-made
assemblies which include an evaporator or cooling coil, a compressor and
condenser combination, and may include a heating function as well. Where
such equipment is provided in more than one assembly, the separate
assemblies shall be designed to be used together.
UNITARY HEAT PUMP: One or more factory-made assemblies which include an
indoor conditioning coil, compressor(s) and outdoor coil or refrigerant-to-water heat exchanger, including means to provide both heating and
cooling functions. When such equipment is provided in more than one
assembly, the separate assemblies shall be designed to be used together.
VAPOR RETARDER: A layer of low moisture transmissivity material (not
more than 1.0 perm dry cup) placed over the warm side (in winter) of
insulation, over the exterior of below grade walls, and under floors as
ground cover to limit the transport of water and water vapor through
exterior walls, ceilings, and floors. Vapor retarding paint, listed for
this application, also meets this definition.
VAULTED CEILINGS: All ceilings where enclosed joist or rafter space is
formed by ceilings applied directly to the underside of roof joists or
rafters.
VENTILATION: The process of supplying or removing air by natural or
mechanical means to or from any space. Such air may or may not have been
conditioned.
VENTILATION AIR: That portion of supply air which comes from outside
(outdoors) plus any recirculated air that has been treated to maintain
the desired quality of air within a designated space.
VERTICAL GLAZING: A glazing surface that has a slope of sixty degrees
or greater from the horizontal plane.
WALLS (EXTERIOR): Any member or group of members which defines the
exterior boundaries or courts of a building and which have a slope of
sixty degrees or greater with the horizontal plane, and separates
conditioned from unconditioned space. Band joists between floors are to
be considered a part of exterior walls.
ZONE: A space or group of spaces within a building with heating and/or
cooling requirements sufficiently similar so that comfort conditions can
be maintained throughout by a single controlling device. Each dwelling
unit in residential buildings shall be considered a single zone.
[Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1210, filed
10/18/93, effective 4/1/94.]
AMENDATORY SECTION (Amending WSR 93-21-052, filed 10/18/93, effective
4/1/94)
WAC 51-11-1301 Scope. Conditioned buildings or portions thereof
shall be constructed to provide the required thermal performance of the
various components according to the requirements of this chapter. Unless
otherwise approved by the building official, all spaces shall be assumed
to be at least semi-heated.
EXCEPTION:
1. Greenhouses isolated from any conditioned space and not intended for occupancy.
2. As approved by the building official, spaces not assumed to be at least semi-heated.
3. Unconditioned Group ((M)) U occupancy accessory to Group R occupancy.
4. Unstaffed equipment shelters or cabinets used solely for personal wireless service facilities.
[Statutory Authority: RCW 19.27A.025. 93-21-052, 51-11-1301, filed 10/18/93, effective 4/1/94.]