Chapter 51-11C WAC

Last Update: 8/23/17

STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE 2015 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, COMMERCIAL

WAC Sections

51-11C-10000Chapter 1 CE—Scope and administration.
51-11C-10100Section C101—Scope and general requirements.
51-11C-10140Section C101.4—Applicability.
51-11C-10143Reserved.
51-11C-10150Section C101.5—Compliance.
51-11C-10200Section C102—Alternate materials—Method of construction, design or insulating systems.
51-11C-10300Section C103—Construction documents.
51-11C-10400Section C104—Inspections.
51-11C-10500Section C105—Validity.
51-11C-10600Section C106—Referenced standards.
51-11C-10700Section C107—Fees.
51-11C-10800Section C108—Stop work order.
51-11C-10900Section C109—Board of appeals.
51-11C-11000Section C110—Violations.
51-11C-11100Section C111—Liability.
51-11C-20000Chapter 2 CE—Definitions.
51-11C-20100Section C201—General.
51-11C-20200Section C202—General definitions.
51-11C-20201Section C202.1—A.
51-11C-20202Section C202.2—B.
51-11C-20203Section C202.3—C.
51-11C-20204Section C202.4—D.
51-11C-20205Section C202.5—E.
51-11C-20206Section C202.6—F.
51-11C-20207Section C202.7—G.
51-11C-20208Section C202.8—H.
51-11C-20209Section C202.9—I.
51-11C-20210Section C202.10—J.
51-11C-20211Section C202.11—K.
51-11C-20212Section C202.12—L.
51-11C-20213Section C202.13—M.
51-11C-20214Section C202.14—N.
51-11C-20215Section C202.15—O.
51-11C-20216Section C202.16—P.
51-11C-20217Section C202.17—Q.
51-11C-20218Section C202.18—R.
51-11C-20219Section C202.19—S.
51-11C-20220Section C202.20—T.
51-11C-20221Section C202.21—U.
51-11C-20222Section C202.22—V.
51-11C-20223Section C202.23—W.
51-11C-20224Section C202.24—X, Y, Z.
51-11C-30000Chapter 3 CE—General requirements.
51-11C-30100Section C301—Climate zones.
51-11C-30200Section C302—Design conditions.
51-11C-30300Section C303—Materials, systems and equipment.
51-11C-30310Section 303.1—Identification.
51-11C-303131Table C303.1.3(1)—Default glazed fenestration U-factors.
51-11C-303132Table C303.1.3(2)—Default door U-factors.
51-11C-303133Table C303.1.3(3)—Default glazed fenestration SHGC and VT.
51-11C-303134Table C303.1.3(4)—Default U-factors for skylights.
51-11C-303135Table C303.1.3(5)—Small business compliance default table.
51-11C-30320Section C303.2—Installation.
51-11C-30330Section C303.3—Maintenance information.
51-11C-40000Chapter 4 CE—Commercial energy efficiency.
51-11C-40100Section C401—General.
51-11C-40200Section C402—Building envelope requirements.
51-11C-40210Section C402.1—General (Prescriptive).
51-11C-40211Section C402.1.1—Low energy buildings.
51-11C-40212Section C402.1.2—Equipment buildings.
51-11C-402121Table C402.1.3—Opaque thermal envelope assembly R-value requirements.
51-11C-40213Section C402.1.3—Insulation component R-value method.
51-11C-402131Reserved.
51-11C-402132Reserved.
51-11C-402133Reserved.
51-11C-402134Reserved.
51-11C-40214Section C402.1.4—Assembly U-factor, C-factor, or F-factor-based method.
51-11C-402141Table C402.1.4—Opaque thermal envelope requirements, U-factor method.
51-11C-402142Table C402.1.4.1—Effective R-values for steel stud wall assemblies.
51-11C-40215Section C402.1.5—Component performance alternative.
51-11C-40220Section C402.2—Specific insulation requirements.
51-11C-402200Reserved.
51-11C-40221Section C402.2.1—Multiple layers of continuous insulation.
51-11C-402211Reserved.
51-11C-40222Section C402.2.2—Roof assembly.
51-11C-40223Section C402.2.3—Above-grade walls.
51-11C-40224Section C402.2.4—Below-grade walls.
51-11C-40225Section C402.2.5—Floors.
51-11C-40226Section C402.2.6—Slab-on-grade perimeter insulation.
51-11C-40227Reserved.
51-11C-40228Section C402.2.8—Insulation of radiant heating systems.
51-11C-40230Section C402.4—Fenestration (Prescriptive).
51-11C-402300Table C402.4—Building envelope requirements—Fenestration.
51-11C-40231Section C402.4.1—Maximum area.
51-11C-40232Section C402.4.2—Minimum skylight fenestration area.
51-11C-40233Section C402.4.3—Maximum U-factor and SHGC.
51-11C-40234Section C402.4.4—Doors.
51-11C-40240Section C402.5—Air leakage-thermal envelope.
51-11C-40241Section C402.5.1—Air barriers.
51-11C-40242Reserved.
51-11C-40243Section C402.5.3—Rooms containing fuel-burning appliances.
51-11C-40244Section C402.5.4—Doors and access openings.
51-11C-40245Section C402.5.5—Air intakes, exhaust openings, stairways and shafts.
51-11C-40246Section C402.5.6—Loading dock weatherseals.
51-11C-40247Section C402.5.7—Vestibules.
51-11C-40248Section C402.5.8—Recessed lighting.
51-11C-40250Reserved.
51-11C-40260Reserved.
51-11C-40300Section C403—Mechanical systems.
51-11C-40310Section C403.1—General.
51-11C-40320Section C403.2—Provisions applicable to all mechanical systems.
51-11C-40321Section C403.2.1—Calculation of heating and cooling loads.
51-11C-40322Section C403.2.2—Equipment and systems sizing.
51-11C-40323Section C403.2.3—HVAC equipment performance requirements.
51-11C-403231Table C403.2.3(1)—Minimum efficiency requirements—Electrically operated unitary air conditioners and condensing units.
51-11C-403232Table C403.2.3(2)—Minimum efficiency requirements—Electrically operated unitary and applied heat pumps.
51-11C-403233Table C403.2.3(3)—Minimum efficiency requirements—Electrically operated PTAC, PTHP, SPVAC, SPVHP, room air conditioners.
51-11C-403234Table C403.2.3(4)—Minimum efficiency requirements—Warm air furnaces and unit heaters.
51-11C-403235Table C403.2.3(5)—Minimum efficiency requirements—Gas- and oil-fired boilers.
51-11C-403236Table C403.2.3(6)—Reserved.
51-11C-403237Table C403.2.3(7)—Minimum efficiency requirements—Water chilling packages.
51-11C-403238Table C403.2.3(8)—Minimum efficiency requirements—Heat rejection equipment.
51-11C-403239Table C403.2.3(9) and Table C403.2.3(10)—Minimum efficiency requirements.
51-11C-40324Section C403.2.4—HVAC system controls.
51-11C-403241Section C403.2.4.1—Thermostatic controls.
51-11C-403242Section C403.2.4.2—Off-hour controls.
51-11C-403243Section C403.2.4.3—Shutoff dampers.
51-11C-403244Section C403.2.4.4—Zone isolation.
51-11C-403245Section C403.2.4.5—Snowmelt and freeze protection controls.
51-11C-403246Section C403.2.4.7—Economizer fault detection and Section C403.2.4.8—Combustion heating equipment controls.
51-11C-403247Sections C403.2.4.9 through C403.2.4.11—Group R controls.
51-11C-403248Section C403.2.4.12—Direct digital control systems.
51-11C-403249Section C403.2.5—Hot water boiler controls.
51-11C-40325Section C403.2.6—Ventilation.
51-11C-403251Reserved.
51-11C-403252Section C403.2.6.2—Demand control ventilation.
51-11C-403253Section C403.2.6.3—Occupancy sensors.
51-11C-403254Section C403.2.6.4—Loading dock and parking garage ventilation system controls.
51-11C-40326Section C403.2.7—Exhaust systems.
51-11C-403261Reserved.
51-11C-40327Section C403.2.8—Duct and plenum insulation and sealing.
51-11C-40328Section C403.2.9—Piping insulation.
51-11C-403281Table C403.2.9—Minimum pipe insulation thickness.
51-11C-40329Section C403.2.10—Mechanical system commissioning and completion requirements.
51-11C-403291Section C403.2.11—Air system design and control.
51-11C-403292Tables for Section C403.2.11.
51-11C-403293Section C403.2.12—Heating outside a building.
51-11C-403294Section C403.2.13—System criteria.
51-11C-403295Section C403.2.14—Electric motor efficiency.
51-11C-40330Section C403.3—Economizers.
51-11C-40331Section C403.3.1—Integrated economizer control.
51-11C-40332Section C403.3.2—Economizer heating system impact.
51-11C-40333Section C403.3.3—Air economizers.
51-11C-40334Section C403.3.4—Water-side economizers.
51-11C-40340Section C403.4—Hydronic and multiple-zone HVAC systems.
51-11C-40341Reserved.
51-11C-40342Section C403.4.1—Fan control.
51-11C-40343Section C403.4.2—Hydronic systems controls.
51-11C-403431Reserved.
51-11C-40344Section C403.4.3—Heat rejection equipment.
51-11C-40345Section C403.4.4—Requirements for mechanical systems serving multiple zones.
51-11C-40346Reserved.
51-11C-40347Section C403.4.6—Hot gas bypass limitation.
51-11C-40350Section C403.5—Energy recovery.
51-11C-40360Section C403.6—Dedicated outdoor air systems (DOAS).
51-11C-40400Section C404—Service water heating (Mandatory).
51-11C-40401Section C404.1—General.
51-11C-40402Section C404.2—Service water-heating equipment performance efficiency.
51-11C-404021Table C404.2—Minimum performance of water-heating equipment.
51-11C-40403Section C404.3—Efficient heated water supply piping.
51-11C-40404Section C404.4—Heat traps.
51-11C-40405Section C404.5—Water heater installation.
51-11C-40406Section C404.6—Pipe insulation.
51-11C-40407Section C404.7—Heated-water circulating and temperature maintenance systems.
51-11C-40408Section C404.8—Demand recirculation controls.
51-11C-40409Section C404.9—Domestic hot water meters.
51-11C-404091Section C404.10—Drain water heat recovery units.
51-11C-40410Section C404.11—Pools and spas.
51-11C-40413Section C404.13—Service water-heating system commissioning and completion requirements.
51-11C-40500Section C405—Electrical power and lighting systems.
51-11C-40501Section C405.1—General.
51-11C-40502Section C405.2—Electrical power and lighting systems.
51-11C-405021Section C405.2.1—Occupant sensor controls.
51-11C-405022Section C405.2.2—Time switch controls.
51-11C-405023Section C405.2.3—Manual controls.
51-11C-405024Section C405.2.4—Daylight responsive controls.
51-11C-405025Section C405.2.5—Additional lighting controls.
51-11C-405026Section C405.2.6—Digital timer switch.
51-11C-405027Section C405.2.7—Exterior lighting controls.
51-11C-405028Section C405.2.8—Area controls.
51-11C-40503Reserved.
51-11C-40504Section C405.3—Exit signs.
51-11C-40505Section C405.4—Interior lighting power requirements.
51-11C-405051Section C405.4.1—Total connected interior lighting power.
51-11C-405052Section C405.4.2—Interior lighting power requirements.
51-11C-405053Table C405.4.2(1)—Interior lighting power allowances—Building area method.
51-11C-405054Table C405.4.2(2)—Interior lighting power allowances—Space-by-space method.
51-11C-40506Section C405.5—Exterior lighting.
51-11C-405061Section C405.5.1—Exterior building grounds lighting.
51-11C-405062Section C405.5.2—Exterior building lighting power.
51-11C-405063Table C405.5.2(1)—Exterior lighting zones.
51-11C-405064Table C405.5.2(2)—Individual lighting power allowances for building exteriors.
51-11C-40507Section C405.6—Electrical energy consumption.
51-11C-40508Section C405.8—Electric motors.
51-11C-40509Section C405.9—Vertical and horizontal transportation systems.
51-11C-40510Section C405.10—Controlled receptacles.
51-11C-40511Electrical power and lighting systems commissioning and completion requirements.
51-11C-40512Reserved.
51-11C-40513Section C405.13—Electrical power and lighting systems commissioning and completion requirements.
51-11C-40600Section C406—Additional efficiency package options.
51-11C-40602Section C406.2—HVAC option.
51-11C-40603Section C406.3—LPA option.
51-11C-40604Section C406.4—Lighting controls option.
51-11C-40605Section C406.5—On-site renewable energy option.
51-11C-40606Section C406.6—DOAS option.
51-11C-40607Section C406.7—Service water heating option.
51-11C-40608Section C406.8—Envelope option.
51-11C-40609Section C406.9—Air infiltration option.
51-11C-40700Section C407—Total building performance.
51-11C-40701Section C407.1—Scope.
51-11C-40702Section C407.2—Mandatory requirements.
51-11C-40703Section C407.3—Performance-based compliance.
51-11C-40704Section C407.4—Documentation.
51-11C-40705Section C407.5—Calculation procedure.
51-11C-407051Table C407.5.1(1)—Specifications for the standard reference and proposed design.
51-11C-407052Table C407.5.1(2)/(3)—HVAC systems map.
51-11C-407053Table C407.5.1(4)—Specifications for the standard reference design HVAC system description.
51-11C-407054Table C407.5.1(5)—Number of chillers.
51-11C-407055Table C407.5.1(6)—Water chiller types.
51-11C-40706Section C407.6—Calculation software tool.
51-11C-40800Section C408—System commissioning.
51-11C-40801Section C408.1—General.
51-11C-408012Figure C408.1.4.2—Commissioning compliance checklist.
51-11C-40802Section C408.2—Mechanical systems commissioning.
51-11C-40803Section C408.3—Lighting system commissioning.
51-11C-40804Section C408.4—Service water heating systems commissioning.
51-11C-408045Section C408.5—Other systems commissioning.
51-11C-40805Section C408.6—Metering system commissioning.
51-11C-40900Section C409—Energy metering and energy consumption management.
51-11C-40901Section C409.1—General.
51-11C-40902Section C409.2—Energy source metering.
51-11C-40903Section C409.3—End-use metering.
51-11C-40904Section C409.4—Measurement devices, data acquisition system and energy display.
51-11C-40905Section C409.5—Metering for existing buildings.
51-11C-41000Section C410—Refrigeration system requirements.
51-11C-50000Chapter 5 [CE]—Existing buildings.
51-11C-50200Section C502—Additions.
51-11C-50300Section C503—Alterations.
51-11C-50400Section C504—Repairs.
51-11C-50500Section C505—Change of occupancy or use.
51-11C-60000Appendix A—Default heat loss coefficients.
51-11C-600000Chapter 6 [CE]—Referenced standards.
51-11C-61010Section A101—General.
51-11C-61011Section A101.1—Scope.
51-11C-61012Section A101.2—Description.
51-11C-61013Section A101.3—Air films.
51-11C-61014Section A101.4—Compression of insulation.
51-11C-61015Section A101.5—Building materials.
51-11C-61020Section A102—Ceilings.
51-11C-61021Section A102.1—General.
51-11C-610211Table A102.1—Default U-factors for ceilings.
51-11C-61022Section A102.2—Component description.
51-11C-610221Tables A102.2.4—Steel truss framed ceiling Uo values.
51-11C-610225Tables A102.2.5—Default U-factors for metal building roofs.
51-11C-610226Tables A102.2.6—Assembly U-factors for roofs with insulation entirely above deck.
51-11C-61030Section A103—Above grade walls.
51-11C-61031Section A103.1—General.
51-11C-61032Section A103.2—Framing description.
51-11C-61033Section A103.3—Component description.
51-11C-610331Section A103.3.1—Single stud wall.
51-11C-610332Section A103.3.2—Strap wall.
51-11C-610333Section A103.3.3—Double stud wall.
51-11C-610334Section A103.3.4—Log wall.
51-11C-610335Section A103.3.5—Stress skin panel.
51-11C-610336Section A103.3.6—Metal stud walls.
51-11C-610337Section A103.3.7—Concrete and masonry walls.
51-11C-61040Section A104—Below-grade walls and slabs.
51-11C-61041Section A104.1—General.
51-11C-61042Section A104.2—Component description.
51-11C-61043Section A104.3—Insulation description.
51-11C-61050Section A105—Floors over unconditioned space.
51-11C-61051Section A105.1—General.
51-11C-61052Section A105.2—Crawlspace description.
51-11C-61053Section A105.3—Construction description.
51-11C-61060Section A106—On-grade slab floors.
51-11C-61061Section A106.1—General.
51-11C-61062Section A106.2—Component description.
51-11C-61063Section A106.3—Insulation description.
51-11C-61070Section A107—Default U-factors for doors.
51-11C-61071Section A107.1—Doors without NFRC certification.
51-11C-610711Table A107.1(1)—Default U-factors for doors.
51-11C-610712Table A107.1(2)—Default U-factors for revolving doors.
51-11C-610713Table A107.1(3)—Default U-factors for steel emergency doors.
51-11C-610714Table A107.1(4)—Default U-factors for steel garage and hangar doors.
51-11C-61080Section A108—Air infiltration.
51-11C-61081Section A108.1—General.
51-11C-70000Appendix B—Default internal load values and schedules.
51-11C-71010Section B101—General.
51-11C-71020Section B102—Default tables of internal loads.
51-11C-71021Table B102—Acceptable occupancy densities, receptacle power densities and service hot water consumption.
51-11C-71030Section B103—Default schedules.
51-11C-71031Table B103(1)—Assembly occupancy.
51-11C-71032Table B103(2)—Health occupancy.
51-11C-71033Table B103(3)—Hotel/motel occupancy.
51-11C-71034Table B103(4)—Light manufacturing occupancy.
51-11C-71035Table B103(5)—Office occupancy.
51-11C-71036Table B103(6)—Parking garage occupancy.
51-11C-71037Table B103(7)—Restaurant occupancy.
51-11C-71038Table B103(8)—Retail occupancy.
51-11C-71039Table B103(9)—School and warehouse occupancies.
51-11C-80000Appendix C—Exterior design conditions.
51-11C-80100Table C-1—Outdoor design temperatures for Washington.
51-11C-80500Appendix D—Renewable energy.
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