The current MasterFormat Divisions are:
PROCUREMENT AND CONTRACTING REQUIREMENTS GROUP:
Division 00 — Procurement and Contracting Requirements
SPECIFICATIONS GROUP
General Requirements Subgroup
Division 01 — General Requirements
Facility Construction Subgroup
Division 02 — Existing Conditions(natural conditions)
 Division 03 — Concrete(footing)
 Division 04 — Masonry(concrete block/brick)
 Division 05 — Metals(beams)
 Division 06 — Wood, Plastics, and Composites(framing)
 Division 07 — Thermal and Moisture Protection(insulation water barrier)
 Division 08 — Openings(door ways/windows)
 Division 09 — Finishes
 Division 10 — Specialties
 Division 11 — Equipment
 Division 12 — Furnishings
 Division 13 — Special Construction
 Division 14 — Conveying Equipment
 Division 15 — RESERVED FOR FUTURE EXPANSION
 Division 16 — RESERVED FOR FUTURE EXPANSION
 Division 17 — RESERVED FOR FUTURE EXPANSION
 Division 18 — RESERVED FOR FUTURE EXPANSION
 Division 19 — RESERVED FOR FUTURE EXPANSION
Facility Services Subgroup:
Division 20 — RESERVED FOR FUTURE EXPANSION
 Division 21 — Fire Suppression
 Division 22 — Plumbing
 Division 23 — Heating Ventilating and Air Conditioning
 Division 24 — RESERVED FOR FUTURE EXPANSION
 Division 25 — Integrated Automation
 Division 26 — Electrical
 Division 27 — Communications
 Division 28 — Electronic Safety and Security
 Division 29 — RESERVED FOR FUTURE EXPANSION
Site and Infrastructure Subgroup:
Division 30 — RESERVED FOR FUTURE EXPANSION
 Division 31 — Earthwork
 Division 32 — Exterior Improvements
 Division 33 — Utilities
 Division 34 — Transportation
 Division 35 — Waterway and Marine
 Division 36 — RESERVED FOR FUTURE EXPANSION
 Division 37 — RESERVED FOR FUTURE EXPANSION
 Division 38 — RESERVED FOR FUTURE EXPANSION
 Division 39 — RESERVED FOR FUTURE EXPANSION
Process Equipment Subgroup:
Division 40 — Process Integration
 Division 41 — Material Processing and Handling Equipment
 Division 42 — Process Heating, Cooling, and Drying Equipment
 Division 43 — Process Gas and Liquid Handling, Purification and Storage Equipment
 Division 44 — Pollution and Waste Control Equipment
 Division 45 — Industry-Specific Manufacturing Equipment
 Division 46 — Water and Wastewater Equipment
 Division 47 — RESERVED FOR FUTURE EXPANSION
 Division 48 — Electrical Power Generation
 Division 49 — RESERVED FOR FUTURE EXPANSION
In November 2004, MasterFormat expanded from 16 Divisions to 50 Divisions, reflecting innovations in the construction industry and expanding the coverage to a larger part of the construction industry. Updates were published in 2010 and 2012. A new strategy to classify the built environment, named OmniClass,[7] incorporates the work results classification in its Table 22 Work Results.
Old Version of Master Format
DIVISION 1 – GENERAL REQUIREMENTS
 01100 SUMMARY
 01125 SUMMARY OF MULTIPLE CONTRACTS
 01140 WORK RESTRICTIONS
 01210 ALLOWANCES
 01230 ALTERNATES
 01250 CONTRACT MODIFICATION PROCEDURES
 01270 UNIT PRICES
 01290 PAYMENT PROCEDURES
 01310 PROJECT MANAGEMENT AND COORDINATION
 01320 CONSTRUCTION PROGRESS DOCUMENTATION
 01322 PHOTOGRAPHIC DOCUMENTATION
 01330 SUBMITTAL PROCEDURES
 01351 SPECIAL PROCEDURES FOR HISTORIC TREATMENT
 01400 QUALITY REQUIREMENTS
 01420 REFERENCES
 01500 TEMPORARY FACILITIES AND CONTROLS
 01600 PRODUCT REQUIREMENTS
 01700 EXECUTION REQUIREMENTS
 01731 CUTTING AND PATCHING
 01732 SELECTIVE DEMOLITION
 01770 CLOSEOUT PROCEDURES
 01781 PROJECT RECORD DOCUMENTS
 01782 OPERATION AND MAINTENANCE DATA
 01820 DEMONSTRATION AND TRAINING
DIVISION 2 – SITE CONSTRUCTION
 02080 PIPED UTILITIES – BASIC MATERIALS AND METHODS
 02085 INTERCEPTORS
 02221 BUILDING DEMOLITION
 02230 SITE CLEARING
 02231 TREE PROTECTION AND TRIMMING
 02240 DEWATERING
 02260 EXCAVATION SUPPORT AND PROTECTION
 02300 EARTHWORK
 02361 TERMITE CONTROL
 02456 CONCRETE-FILLED STEEL PILES
 02457 PRESTRESSED CONCRETE PILES
 02458 STEEL H PILES
 02459 TIMBER PILES
 02466 DRILLED PIERS
 02510 WATER DISTRIBUTION
 02525 WATER SUPPLY WELLS
 02530 SANITARY SEWERAGE
 02532 PACKAGED PUMPING STATIONS
 02535 CHEMICAL-WASTE SEWERAGE
 02540 SEPTIC TANK SYSTEMS
 02551 HYDRONIC DISTRIBUTION
 02552 GEOTHERMAL ENERGY RECOVERY PIPING
 02553 NATURAL GAS DISTRIBUTION
 02554 FUEL OIL DISTRIBUTION
 02555 STEAM DISTRIBUTION
 02582 LIGHTING POLES AND STANDARDS
 02584 UNDERGROUND DUCTS AND UTILITY STRUCTURES
 02620 SUBDRAINAGE
 02630 STORM DRAINAGE
 02666 POND AND RESERVOIR LINERS
 02741 HOT-MIX ASPHALT PAVING
 02751 CEMENT CONCRETE PAVEMENT
 02764 PAVEMENT JOINT SEALANTS
 02768 STAMPED CEMENT CONCRETE PAVEMENT
 02780 UNIT PAVERS
 02791 PLAYGROUND SURFACE SYSTEMS
 02810 IRRIGATION SYSTEMS
 02821 CHAIN-LINK FENCES AND GATES
 02832 SEGMENTAL RETAINING WALLS
 02870 SITE AND STREET FURNISHINGS
 02881 PLAYGROUND EQUIPMENT AND STRUCTURES
 02920 LAWNS AND GRASSES
 02930 EXTERIOR PLANTS
DIVISION 3 – CONCRETE
 03300 CAST-IN-PLACE CONCRETE
 03301 CAST-IN-PLACE CONCRETE (LIMITED APPLICATIONS)
 03331 CAST-IN-PLACE ARCHITECTURAL CONCRETE
 03371 SHOTCRETE
 03410 PLANT-PRECAST STRUCTURAL CONCRETE
 03450 PLANT-PRECAST ARCHITECTURAL CONCRETE
 03470 TILT-UP PRECAST CONCRETE
 03491 GLASS FIBER REINFORCED CONCRETE
 03511 CEMENTITIOUS WOOD-FIBER DECK
 03520 LIGHTWEIGHT CONCRETE ROOF INSULATION
 03532 CONCRETE FLOOR TOPPING
 03542 CEMENT-BASED UNDERLAYMENT
 03930 CONCRETE REHABILITATION
DIVISION 4 – MASONRY
 04720 CAST STONE
 04810 UNIT MASONRY ASSEMBLIES
 04815 GLASS UNIT MASONRY ASSEMBLIES
 04851 DIMENSION STONE CLADDING
 04860 STONE VENEER ASSEMBLIES
 04901 CLAY MASONRY RESTORATION AND CLEANING
 04902 STONE RESTORATION AND CLEANING
DIVISION 5 – METALS
 05120 STRUCTURAL STEEL
 05210 STEEL JOISTS
 05310 STEEL DECK
 05400 COLD-FORMED METAL FRAMING
 05500 METAL FABRICATIONS
 05511 METAL STAIRS
 05521 PIPE AND TUBE RAILINGS
 05530 GRATINGS
 05580 FORMED-METAL FABRICATIONS
 05700 ORNAMENTAL METAL
 05715 FABRICATED SPIRAL STAIRS
 05721 ORNAMENTAL RAILINGS
 05811 ARCHITECTURAL JOINT SYSTEMS
 05910 HISTORIC TREATMENT OF ORNAMENTAL METAL
DIVISION 6 – WOOD AND PLASTICS
 06100 ROUGH CARPENTRY
 06105 MISCELLANEOUS CARPENTRY
 06130 HEAVY TIMBER CONSTRUCTION
 06150 WOOD DECKING
 06176 METAL-PLATE-CONNECTED WOOD TRUSSES
 06185 STRUCTURAL GLUED-LAMINATED TIMBER
 06200 FINISH CARPENTRY
 06401 EXTERIOR ARCHITECTURAL WOODWORK
 06402 INTERIOR ARCHITECTURAL WOODWORK
 06420 PANELING
DIVISION 7 – THERMAL AND MOISTURE PROTECTION
 07115 BITUMINOUS DAMPPROOFING
 07131 SELF-ADHERING SHEET WATERPROOFING
 07132 ELASTOMERIC SHEET WATERPROOFING
 07133 THERMOPLASTIC SHEET WATERPROOFING
 07141 COLD FLUID-APPLIED WATERPROOFING
 07142 HOT FLUID-APPLIED WATERPROOFING
 07161 MODIFIED CEMENT WATERPROOFING
 07162 CRYSTALLINE WATERPROOFING
 07163 METAL-OXIDE WATERPROOFING
 07170 BENTONITE WATERPROOFING
 07180 TRAFFIC COATINGS
 07190 WATER REPELLENTS
 07210 BUILDING INSULATION
 07241 EXTERIOR INSULATION AND FINISH SYSTEMS – CLASS PB
 07242 EXTERIOR INSULATION AND FINISH SYSTEMS – CLASS PM
 07311 ASPHALT SHINGLES
 07313 METAL SHINGLES
 07315 SLATE SHINGLES
 07317 WOOD SHINGLES AND SHAKES
 07321 CLAY ROOF TILES
 07322 CONCRETE ROOF TILES
 07411 METAL ROOF PANELS
 07412 METAL WALL PANELS
 07460 SIDING
 07511 BUILT-UP ASPHALT ROOFING
 07512 BUILT-UP COAL-TAR ROOFING
 07531 EPDM MEMBRANE ROOFING
 07532 CSPE MEMBRANE ROOFING
 07540 THERMOPLASTIC MEMBRANE ROOFING
 07551 APP-MODIFIED BITUMINOUS MEMBRANE ROOFING
 07552 SBS-MODIFIED BITUMINOUS MEMBRANE ROOFING
 07553 SELF-ADHERING MODIFIED BITUMINOUS MEMBRANE ROOFING
 07561 HOT FLUID-APPLIED ROOFING
 07570 COATED FOAMED ROOFING
 07591 MEMBRANE REROOFING PREPARATION
 07610 SHEET METAL ROOFING
 07620 SHEET METAL FLASHING AND TRIM
 07710 MANUFACTURED ROOF SPECIALTIES
 07716 ROOF EXPANSION ASSEMBLIES
 07720 ROOF ACCESSORIES
 07811 SPRAYED FIRE-RESISTIVE MATERIALS
 07821 BOARD FIRE PROTECTION
 07841 THROUGH-PENETRATION FIRESTOP SYSTEMS
 07842 FIRE-RESISTIVE JOINT SYSTEMS
 07920 JOINT SEALANTS
DIVISION 8 – DOORS AND WINDOWS
 08110 STEEL DOORS AND FRAMES
 08114 CUSTOM STEEL DOORS AND FRAMES
 08125 INTERIOR ALUMINUM FRAMES
 08161 SLIDING METAL FIRE DOORS
 08163 SLIDING ALUMINUM-FRAMED GLASS DOORS
 08211 FLUSH WOOD DOORS
 08212 STILE AND RAIL WOOD DOORS
 08263 SLIDING WOOD-FRAMED GLASS DOORS
 08311 ACCESS DOORS AND FRAMES
 08322 STEEL DETENTION DOORS AND FRAMES
 08331 OVERHEAD COILING DOORS
 08334 OVERHEAD COILING GRILLES
 08343 ICU/CCU ENTRANCE DOORS
 08346 SOUND CONTROL DOORS
 08351 FOLDING DOORS
 08361 SECTIONAL OVERHEAD DOORS
 08411 ALUMINUM-FRAMED ENTRANCES AND STOREFRONTS
 08450 ALL-GLASS ENTRANCES AND STOREFRONTS
 08461 SLIDING AUTOMATIC ENTRANCE DOORS
 08462 SWINGING AUTOMATIC ENTRANCE DOORS
 08463 FOLDING AUTOMATIC ENTRANCE DOORS
 08470 REVOLVING ENTRANCE DOORS
 08510 STEEL WINDOWS
 08520 ALUMINUM WINDOWS
 08550 WOOD WINDOWS
 08581 DETENTION WINDOWS
 08582 SECURITY WINDOWS
 08592 HISTORIC TREATMENT OF WOOD WINDOWS
 08610 ROOF WINDOWS
 08620 UNIT SKYLIGHTS
 08630 METAL-FRAMED SKYLIGHTS
 08632 POLYCARBONATE-INSULATING-PANEL SKYLIGHTS
 08633 FIBERGLASS-SANDWICH-PANEL SKYLIGHTS
 08711 DOOR HARDWARE (SCHEDULED BY NAMING PRODUCTS)
 08712 DOOR HARDWARE (SCHEDULED BY DESCRIBING PRODUCTS)
 08716 AUTOMATIC DOOR OPERATORS
 08781 DETENTION DOOR HARDWARE
 08800 GLAZING
 08801 SECURITY GLAZING
 08814 MIRRORED GLASS
 08825 DECORATIVE GLASS
 08840 PLASTIC GLAZING
 08911 GLAZED ALUMINUM CURTAIN WALLS
 08912 STRUCTURAL-SEALANT-GLAZED CURTAIN WALLS
 08960 SLOPED GLAZING SYSTEMS
DIVISION 9 – FINISHES
 09210 GYPSUM PLASTER
 09215 GYPSUM VENEER PLASTER
 09220 PORTLAND CEMENT PLASTER
 09251 FACTORY-FINISHED GYPSUM BOARD
 09253 GYPSUM SHEATHING
 09260 GYPSUM BOARD ASSEMBLIES
 09265 GYPSUM BOARD SHAFT-WALL ASSEMBLIES
 09271 GLASS-REINFORCED GYPSUM FABRICATIONS
 09310 CERAMIC TILE
 09385 DIMENSION STONE TILE
 09401 CEMENTITIOUS TERRAZZO
 09402 EPOXY TERRAZZO
 09511 ACOUSTICAL PANEL CEILINGS
 09512 ACOUSTICAL TILE CEILINGS
 09513 ACOUSTICAL SNAP-IN METAL PAN CEILINGS
 09514 ACOUSTICAL METAL PAN CEILINGS
 09547 LINEAR METAL CEILINGS
 09549 SECURITY CEILING SYSTEMS
 09580 SUSPENDED DECORATIVE GRIDS
 09621 FLUID-APPLIED ATHLETIC FLOORING
 09622 RESILIENT ATHLETIC FLOORING
 09635 BRICK FLOORING
 09636 CHEMICAL-RESISTANT BRICK FLOORING
 09638 STONE PAVING AND FLOORING
 09640 WOOD FLOORING
 09644 WOOD ATHLETIC-FLOORING ASSEMBLIES
 09651 RESILIENT FLOOR TILE
 09652 SHEET VINYL FLOOR COVERINGS
 09653 RESILIENT WALL BASE AND ACCESSORIES
 09654 LINOLEUM FLOOR COVERINGS
 09661 STATIC-CONTROL RESILIENT FLOOR COVERINGS
 09671 RESINOUS FLOORING
 09680 CARPET
 09681 CARPET TILE
 09720 WALL COVERINGS
 09751 INTERIOR STONE FACING
 09771 FABRIC-WRAPPED PANELS
 09772 STRETCHED-FABRIC WALL SYSTEMS
 09841 ACOUSTICAL WALL PANELS
 09911 PAINTING (CONSUMER LINE PRODUCTS)
 09912 PAINTING (PROFESSIONAL LINE PRODUCTS)
 09921 INTERIOR PAINTING (CONSUMER LINE PRODUCTS)
 09922 INTERIOR PAINTING (PROFESSIONAL LINE PRODUCTS)
 09931 EXTERIOR WOOD STAINS
 09945 MULTICOLORED INTERIOR COATINGS
 09960 HIGH-PERFORMANCE COATINGS
 09963 ELASTOMERIC COATINGS
 09967 INTUMESCENT PAINTS
 09975 HIGH-TEMPERATURE-RESISTANT COATINGS
 09980 WOOD-VENEER WALL COVERINGS
 09981 CEMENTITIOUS COATINGS
 09992 PAINTING RESTORATION
DIVISION 10 – SPECIALTIES
 10101 VISUAL DISPLAY SURFACES
 10125 BULLETIN BOARDS AND DISPLAY CASES
 10155 TOILET COMPARTMENTS
 10180 STONE TOILET COMPARTMENTS
 10190 CUBICLES
 10200 LOUVERS AND VENTS
 10265 IMPACT-RESISTANT WALL PROTECTION
 10270 ACCESS FLOORING
 10350 FLAGPOLES
 10405 BANNERS
 10410 DIRECTORIES
 10431 SIGNS
 10436 POST AND PANEL SIGNS
 10437 PYLON SIGNS
 10505 METAL LOCKERS
 10506 WOOD LOCKERS
 10520 FIRE-PROTECTION SPECIALTIES
 10521 SECURITY FIRE-PROTECTION SPECIALTIES
 10550 POSTAL SPECIALTIES
 10605 WIRE MESH PARTITIONS
 10616 SITE-ASSEMBLED DEMOUNTABLE PARTITIONS
 10620 DEMOUNTABLE UNITIZED-PANEL PARTITIONS
 10651 OPERABLE PANEL PARTITIONS
 10653 FIRE-RATED OPERABLE PANEL PARTITIONS
 10655 ACCORDION FOLDING PARTITIONS
 10671 METAL STORAGE SHELVING
 10750 TELEPHONE SPECIALTIES
 10801 TOILET AND BATH ACCESSORIES
 10812 DETENTION TOILET ACCESSORIES
DIVISION 11 – EQUIPMENT
 11024 FIRE-RATED SECURITY DOORS
 11062 FOLDING AND PORTABLE STAGES
 11063 STAGE CURTAINS
 11132 PROJECTION SCREENS
 11150 PARKING CONTROL EQUIPMENT
 11160 LOADING DOCK EQUIPMENT
 11172 WASTE COMPACTORS
 11191 DETENTION WORK
 11192 DETENTION ENCLOSURES
 11193 DETENTION FURNISHINGS
 11400 FOOD SERVICE EQUIPMENT
 11451 RESIDENTIAL APPLIANCES
 11460 UNIT KITCHENS
 11490 GYMNASIUM EQUIPMENT
 11610 LABORATORY FUME HOODS
DIVISION 12 – FURNISHINGS
 12355 INSTITUTIONAL CASEWORK
 12356 KITCHEN CASEWORK
 12361 METAL LABORATORY CASEWORK
 12362 WOOD LABORATORY CASEWORK
 12363 PLASTIC-LAMINATE LABORATORY CASEWORK
 12365 METAL MEDICAL CASEWORK
 12484 FLOOR MATS AND FRAMES
 12485 FOOT GRILLES
 12491 HORIZONTAL LOUVER BLINDS
 12492 VERTICAL LOUVER BLINDS
 12494 ROLLER SHADES
 12495 PLEATED SHADES
 12496 WINDOW TREATMENT HARDWARE
 12610 FIXED AUDIENCE SEATING
 12760 TELESCOPING STANDS
 12815 INTERIOR PLANTS
 12830 INTERIOR PLANTERS
DIVISION 13 – SPECIAL CONSTRUCTION
 13038 SAUNAS
 13041 MODULAR VAULTS
 13090 RADIATION PROTECTION
 13100 LIGHTNING PROTECTION
 13110 CATHODIC PROTECTION
 13125 METAL BUILDING SYSTEMS
 13129 PREFABRICATED CONTROL BOOTHS
 13210 ELEVATED WATER-STORAGE TANKS
 13220 SURFACE WATER-STORAGE TANKS
 13710 PERIMETER SECURITY
 13720 INTRUSION DETECTION
 13760 VIDEO SURVEILLANCE
 13810 CLOCK AND PROGRAM CONTROL
 13832 DETENTION MONITORING AND CONTROL (PLC BASED)
 13845 LIGHTING CONTROLS
 13851 FIRE ALARM
 13915 FIRE-SUPPRESSION PIPING
 13921 ELECTRIC-DRIVE, CENTRIFUGAL FIRE PUMPS
 13922 DIESEL-DRIVE, CENTRIFUGAL FIRE PUMPS
 13926 ELECTRIC-DRIVE, VERTICAL-TURBINE FIRE PUMPS
 13927 DIESEL-DRIVE, VERTICAL-TURBINE FIRE PUMPS
 13956 FIRE-EXTINGUISHING FOAM PIPING
 13966 HALOGEN AGENT EXTINGUISHING PIPING
 13967 CLEAN-AGENT EXTINGUISHING SYSTEMS
DIVISION 14 – CONVEYING SYSTEMS
 14100 DUMBWAITERS
 14210 ELECTRIC TRACTION ELEVATORS
 14240 HYDRAULIC ELEVATORS
 14310 ESCALATORS
 14320 MOVING WALKS
 14420 WHEELCHAIR LIFTS
 14560 CHUTES
DIVISION 15 – MECHANICAL
 15050 BASIC MECHANICAL MATERIALS AND METHODS
 15055 MOTORS
 15060 HANGERS AND SUPPORTS
 15071 MECHANICAL VIBRATION AND SEISMIC CONTROLS
 15075 MECHANICAL IDENTIFICATION
 15081 DUCT INSULATION
 15082 EQUIPMENT INSULATION
 15083 PIPE INSULATION
 15110 VALVES
 15121 PIPE EXPANSION FITTINGS AND LOOPS
 15122 METERS AND GAGES
 15140 DOMESTIC WATER PIPING
 15150 SANITARY WASTE AND VENT PIPING
 15160 STORM DRAINAGE PIPING
 15181 HYDRONIC PIPING
 15182 STEAM AND CONDENSATE PIPING
 15183 REFRIGERANT PIPING
 15185 HYDRONIC PUMPS
 15186 STEAM CONDENSATE PUMPS
 15189 HVAC WATER TREATMENT
 15191 FUEL OIL PIPING
 15194 FUEL GAS PIPING
 15211 GENERAL-SERVICE COMPRESSED-AIR PIPING
 15212 LABORATORY AIR AND VACUUM PIPING
 15213 MEDICAL GAS PIPING
 15221 CHEMICAL-WASTE PIPING
 15222 PROCESSED-WATER PIPING
 15251 GENERAL-SERVICE COMPRESSED-AIR EQUIPMENT
 15252 LABORATORY AIR AND VACUUM EQUIPMENT
 15255 MEDICAL AIR AND VACUUM EQUIPMENT
 15256 DENTAL AIR AND VACUUM SYSTEMS
 15410 PLUMBING FIXTURES
 15412 EMERGENCY PLUMBING FIXTURES
 15413 SECURITY PLUMBING FIXTURES
 15415 DRINKING FOUNTAINS AND WATER COOLERS
 15430 PLUMBING SPECIALTIES
 15441 DOMESTIC WATER PUMPS
 15444 PACKAGED BOOSTER PUMPS
 15445 SEWAGE PUMPS
 15446 SUMP PUMPS
 15450 POTABLE-WATER STORAGE TANKS
 15469 WATER SOFTENERS
 15485 ELECTRIC, DOMESTIC WATER HEATERS
 15486 FUEL-FIRED, DOMESTIC WATER HEATERS
 15487 DOMESTIC WATER HEAT EXCHANGERS
 15512 CAST-IRON BOILERS
 15513 CONDENSING BOILERS
 15514 FINNED WATER-TUBE BOILERS
 15515 WATER-TUBE BOILERS
 15518 FIRE-TUBE BOILERS
 15519 ELECTRIC BOILERS
 15520 FEEDWATER EQUIPMENT
 15525 DEAERATORS
 15530 FURNACES
 15541 FUEL-FIRED DUCT HEATERS
 15542 FUEL-FIRED RADIANT HEATERS
 15543 FUEL-FIRED UNIT HEATERS
 15550 BREECHINGS, CHIMNEYS, AND STACKS
 15555 DRAFT CONTROL DEVICES
 15561 DIRECT-FIRED H&V UNITS
 15562 INDIRECT-FIRED H&V UNITS
 15621 INDIRECT-FIRED ABSORPTION WATER CHILLERS
 15622 DIRECT-FIRED ABSORPTION WATER CHILLERS
 15625 CENTRIFUGAL WATER CHILLERS
 15626 ROTARY-SCREW WATER CHILLERS
 15628 RECIPROCATING /SCROLL WATER CHILLERS
 15635 REFRIGERANT MONITORING AND SAFETY EQUIPMENT
 15641 OPEN-CIRCUIT, MECHANICAL-DRAFT COOLING TOWERS
 15642 CLOSED-CIRCUIT, MECHANICAL-DRAFT COOLING TOWERS
 15663 EVAPORATIVE CONDENSERS
 15671 CONDENSING UNITS
 15672 AIR-COOLED CONDENSERS
 15710 HEAT EXCHANGERS
 15725 MODULAR INDOOR AIR-HANDLING UNITS
 15731 PACKAGED TERMINAL AIR CONDITIONERS
 15732 ROOFTOP AIR CONDITIONERS
 15733 ROOFTOP REPLACEMENT-AIR UNITS
 15734 COMPUTER-ROOM AIR-CONDITIONING UNITS
 15736 SELF-CONTAINED AIR-CONDITIONING UNITS (15 TONS AND SMALLER)
 15737 SELF-CONTAINED AIR-CONDITIONING UNITS (LARGER THAN 15 TONS)
 15738 SPLIT-SYSTEM AIR-CONDITIONING UNITS
 15745 WATER-SOURCE HEAT PUMPS
 15752 HUMIDIFIERS
 15755 DEHUMIDIFICATION UNITS
 15761 AIR COILS
 15762 ELECTRIC RADIATORS
 15763 FAN-COIL UNITS
 15764 RADIATORS
 15766 CABINET UNIT HEATERS
 15767 PROPELLER UNIT HEATERS
 15768 UNIT VENTILATORS
 15769 RADIANT HEATING PANELS
 15772 RADIANT HEATING PIPING
 15775 ELECTRIC HEATING CABLES
 15785 AIR-TO-AIR ENERGY RECOVERY UNITS
 15815 METAL DUCTS
 15816 NONMETAL DUCTS
 15817 HVAC CASINGS
 15820 DUCT ACCESSORIES
 15834 AIR CURTAINS
 15836 AXIAL FANS
 15837 CENTRIFUGAL FANS
 15838 POWER VENTILATORS
 15840 AIR TERMINAL UNITS
 15855 DIFFUSERS, REGISTERS, AND GRILLES
 15856 INTAKE AND RELIEF VENTILATORS
 15861 AIR FILTERS
 15870 COMMERCIAL KITCHEN HOODS
 15890 AIR DUCT CLEANING
 15900 HVAC INSTRUMENTATION AND CONTROLS
 15940 SEQUENCE OF OPERATION
 15950 TESTING, ADJUSTING, AND BALANCING
DIVISION 16 – ELECTRICAL
 16050 BASIC ELECTRICAL MATERIALS AND METHODS
 16055 OVERCURRENT PROTECTIVE DEVICE COORDINATION
 16060 GROUNDING AND BONDING
 16071 SEISMIC CONTROLS FOR ELECTRICAL WORK
 16075 ELECTRICAL IDENTIFICATION
 16080 ELECTRICAL TESTING
 16120 CONDUCTORS AND CABLES
 16122 UNDERCARPET CABLES
 16124 MEDIUM-VOLTAGE CABLES
 16130 RACEWAYS AND BOXES
 16138 UNDERFLOOR RACEWAYS
 16139 CABLE TRAYS
 16140 WIRING DEVICES
 16145 LIGHTING CONTROL DEVICES
 16215 ELECTRICAL POWER MONITORING AND CONTROL
 16231 PACKAGED ENGINE GENERATORS
 16264 STATIC UNINTERRUPTIBLE POWER SUPPLY
 16265 CENTRAL BATTERY INVERTERS
 16269 VARIABLE FREQUENCY CONTROLLERS
 16271 MEDIUM-VOLTAGE TRANSFORMERS
 16280 POWER FACTOR CORRECTION CAPACITORS
 16289 TRANSIENT VOLTAGE SUPPRESSION
 16315 OVERHEAD ELECTRICAL DISTRIBUTION
 16341 MEDIUM-VOLTAGE SWITCHGEAR
 16361 SECONDARY UNIT SUBSTATIONS
 16410 ENCLOSED SWITCHES AND CIRCUIT BREAKERS
 16415 TRANSFER SWITCHES
 16420 ENCLOSED CONTROLLERS
 16430 SWITCHGEAR
 16441 SWITCHBOARDS
 16442 PANELBOARDS
 16443 MOTOR-CONTROL CENTERS
 16450 ENCLOSED BUS ASSEMBLIES
 16461 DRY-TYPE TRANSFORMERS (600 V AND LESS)
 16470 POWER DISTRIBUTION UNITS
 16491 FUSES
 16511 INTERIOR LIGHTING
 16521 EXTERIOR LIGHTING
 16526 SPORTS LIGHTING
 16555 STAGE LIGHTING
 16570 DIMMING CONTROLS
 16722 INTERCOMMUNICATION EQUIPMENT
 16723 SCHOOL INTERCOM AND PROGRAM EQUIPMENT
 16725 NURSE CALL
 16726 PUBLIC ADDRESS AND MUSIC EQUIPMENT
 16727 SOUND-MASKING EQUIPMENT
 16750 VOICE AND DATA COMMUNICATION CABLING
 16785 MASTER ANTENNA TELEVISION SYSTEM

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