CLASSIFICATION OF CONTRACTORS
PRIMARY CLASSIFICATION A – GENERAL ENGINEERING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| A1 | AIRPORTS | |
| A2 | HIGHWAYS | |
| A3 | DAMS AND RESERVOIRS | |
| A4 | BRIDGES | |
| A5 | DIAMOND AND CORE DRILLING | |
| A6 | DRILLING OF OIL, GAS AND EXPLORATORY WELLS | |
| A7 | EXCAVATING AND GRADING | |
| A8 | SEALING AND STRIPING OF ASPHALTIC SURFACES | |
| A9 | PIERS AND FOUNDATIONS | |
| A10 | COMMERCIAL AND RESIDENTIAL POOLS | |
| A10A | RESIDENTIAL POOLS | |
| A10B | RESIDENTIAL SPAS | |
| A10C | REPAIR OF POOLS AND SPAS | |
| A10D | POOLS AND SPAS OF FIBERGLASS | |
| A10E | MAINTENANCE AND REPAIR OF POOLS AND SPAS | |
| A10F | WATER AND GAS LINES FOR RESIDENTIAL POOLS AND SPAS | |
| A11 | RECYCLING ASPHALT | |
| A12 | EXCAVATING, GRADING, TRENCHING AND SURFACING | |
| A13 | WRECKING BUILDINGS | |
| A14 | STEEL ERECTION AND INDUSTRIAL MACHINERY | |
| A15 | SEWERS, DRAINS AND PIPES | |
| A16 | PAVING OF STREETS, DRIVEWAYS AND PARKING LOTS | |
| A17 | LINES TO TRANSMIT ELECTRICITY | |
| A18 | FARM IRRIGATION | |
| A19 | PIPELINE AND CONDUITS | |
| A19A | WATER | |
| A19B | GAS | |
| A20 | INDUSTRIAL PIPING | |
| A21 | FENCING AND GUARDRAILS | |
| A22 | UNCLASSIFIED | |
| A23 | REMOVAL OF ASBESTOS |
PRIMARY CLASSIFICATION AB - GENERAL ENGINEERING AND GENERAL BUILDING
PRIMARY CLASSIFICATION B - GENERAL BUILDING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| B1 | PREMANUFACTURED HOUSING | |
| B2 | RESIDENTIAL AND SMALL COMMERCIAL | |
| B3 | SPECULATIVE BUILDING | |
| B4 | SERVICE STATIONS | |
| B5 | PREFABRICATED STEEL STRUCTURES |
PRIMARY CLASSIFICATION C1 - PLUMBING AND HEATING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C1A | BOILERS | |
| C1B | FIRE SPRINKLERS | |
| C1C | INSULATION OF PIPES AND DUCTS | |
| C1D | PLUMBING | |
| C1E | SHEET METAL | |
| C1F | HEATING COOLING AND CIRCULATING AIR | |
| C1G | PIPES AND VENTS FOR GAS | |
| C1H | WATER HEATERS | |
| C1I | CHILLED WATER PIPING | |
| C1J | SYSTEMS TO REPLENISH BREATHING AIR FOR FIREFIGHTERS | |
| C1K | INDUSTRIAL PIPING |
PRIMARY CLASSIFICATION C2 – ELECTRICAL
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C2A | ELECTRICAL WIRING | |
| C2B | INTEGRATED CEILINGS | |
| C2C | FIRE DETECTION | |
| C2D | LOW VOLTAGE | |
| C2E | LINES TO TRANSMIT ELECTRICITY | |
| C2F | RESIDENTIAL WIRING | |
| C2G | PHOTOVOLTAICS |
PRIMARY CLASSIFICATION C3 – CARPENTRY
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C3A |
CARPENTRY, REMODELING AND REPAIRS | |
| C3B | FINISH CARPENTRY | |
| C3C | INSULATION & WEATHER STRIPPING | |
| C3D | OVERHEAD DOORS | |
| C3E | DRYWALL |
PRIMARY CLASSIFICATION C4 - PAINTING AND DECORATING
SUBCLASSIFICATION
SUBCLASSIFICATION
| C4A | PAINTING | |
| C4B | WALLCOVERING | |
| C4C | TAPING AND FINISHING | |
| C4D | SANDBLASTING | |
| C4E | DRYWALL | |
| C4F | SHEET METAL STUDS | |
| C4G | ACOUSTICAL TILE | |
| C4H | URETHANE COATINGS |
PRIMARY CLASSIFICATION C5 – CONCRETE CONTRACTING
PRIMARY CLASSIFICATION C6 - ERECTING SIGNS
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C6A | OUTDOOR ADVERTISING | |
| C6B | ELECTRICAL SIGNS | |
| C6C | SHEET METAL | |
| C6D | PAINTED SIGNS |
PRIMARY CLASSIFICATION C7 - ELEVATION AND CONVEYANCE
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C7A | ELEVATOR AND DUMBWAITER | |
| C7B | ESCALATOR AND CONVEYOR | |
| C7C | PNEUMATIC TUBE | |
| C7D | MOVING WALKWAY |
PRIMARY CLASSIFICATION C9 - MOVEMENT OF BUILDINGS
PRIMARY CLASSIFICATION C10 - LANDSCAPE CONTRACTING
PRIMARY CLASSIFICATION C11 - SPRAYING MIXTURES CONTAINING CEMENT
PRIMARY CLASSIFICATION C13 -USING SHEET METAL
PRIMARY CLASSIFICATION C8 - GLASS AND GLAZING
PRIMARY CLASSIFICATION C14 - STEEL REINFORCING AND ERECTION
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C14A | REINFORCING STEEL | |
| C14B | STRUCTURAL STEEL | |
| C14C | ORNAMENTAL METAL | |
| C14D | CURTAIN WALL | |
| C14E | METAL DOORS AND WINDOWS | |
| C14F | STORE FRONTS | |
| C14G | PREFABRICATED STEEL STRUCTURES | |
| C14H | AWNINGS AND LOUVRES | |
| C14I | RIGGING AND CRANES |
PRIMARY CLASSIFICATION C15 - ROOFING AND SIDING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C15A | ROOFING | |
| C15B | SIDING | |
| C15C | INSULATION | |
| C15D | WATERPROOFING |
PRIMARY CLASSIFICATION C16 - FINISHING FLOORS
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C16A | COVERING FLOORS | |
| C16B | FINISHING COUNTERS | |
| C16C | PLASTIC TILE AND WALLBOARD | |
| C16D | CARPET LAYING | |
| C16E | URETHANE COATINGS |
PRIMARY CLASSIFICATION C17 - LATHING AND PLASTERING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C17A | LATHING | |
| C17B | PLASTERING | |
| C17C | DRYWALL | |
| C17D | ACOUSTICAL TILE | |
| C17E | COATINGS OF STUCCO AND CEMENT | |
| C17F | STUDS OF SHEET METAL |
PRIMARY CLASSIFICATION C18 – MASONRY
PRIMARY CLASSIFICATION C19 - INSTALLING TERRAZZO AND MARBLE
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C19A | TERRAZZO | |
| C19B | MARBLE | |
| C19C | ARTIFICIAL OR CULTURED MARBLE |
PRIMARY CLASSIFICATIONS C20 - TILING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C20A | PLASTIC TILE AND WALLBOARD | |
| C20B | SWIMMING POOL TILE AND COPING |
PRIMARY CLASSIFICATION C21 - REFRIGERATION AND AIR CONDITIONING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C21A | REFRIGERATION | |
| C21B | AIR CONDITIONING | |
| C21C | SHEET METAL | |
| C21D | MAINTENANCE | |
| C21E | SOLAR AIR CONDITIONING | |
| C21F | CHILLED AND HOT WATER SYSTEMS | |
| C21G | INDUSTRIAL PIPING |
PRIMARY CLASSIFICATION C23 - DRILLING WELLS AND INSTALLING PUMPS, PRESSURE TANKS & STORAGE TANKS
PRIMARY CLASSIFICATION C24 - ERECTING SCAFFOLDS AND BLEACHERS
PRIMARY CLASSIFICATION C25 - FENCING AND EQUIPPING PLAYGROUNDS
PRIMARY CLASSIFICATION C26 - INSTITUTIONAL CONTRACTING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C26A | KITCHEN AND LABORATORY EQUIPMENT | |
| C26B | BUILDING ACCESSORIES AND SPECIALTIES | |
| C26C | FLOORS OF GYMNASIUMS |
PRIMARY CLASSIFICATION C27 - INDIVIDUAL SEWERAGE
PRIMARY CLASSIFICATION C28 - FABRICATING TANKS
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C28A | FABRICATING TANKS | |
| C28B | SANDBLASTING AND COATINGS |
PRIMARY CLASSIFICATION C30 - INSTALLING EQUIPMENT TO TREAT WATER
PRIMARY CLASSIFICATION C31 - WRECKING
PRIMARY CLASSIFICATION C33 - INSTALLING INDUSTRIAL MACHINERY
PRIMARY CLASSIFICATIONS C36 - INSTALLING URETHANE
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C36A | URETHANE INSULATION | |
| C36B | URETHANE ROOF DECKS | |
| C36C | URETHANE COATINGS |
PRIMARY CLASSIFICATION C37 - SOLAR CONTRACTING
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C37A | WATER HEATING | |
| C37B | SPACE HEATING | |
| C37C | AIR CONDITIONING | |
| C37D | HEATING OF POOLS |
PRIMARY CLASSIFICATION C38 - INSTALLING EQUIPMENT USED WITH LIQUEFIED PETROLEUM AND NATURAL GAS
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C38A | PIPES AND VENTS | |
| C38B | GAS APPLIANCES AND EQUIPMENT | |
| C38C | HEATING AND VENTILATING |
PRIMARY CLASSIFICATION C39 - INSTALLING HEATERS
PRIMARY CLASSIFICATION C40 - SPECIALTIES NOT AUTHORIZED BY OTHER CLASSIFICATIONS
PRIMARY CLASSIFICATION C41 - FIRE PROTECTION
SUBCLASSIFICATIONS
SUBCLASSIFICATIONS
| C41A | AUTOMATIC FIRE SPRINKLERS | |
| C41B | FIXED FIRE EXTINGUISHING SYSTEMS | |
| C41C | FIRE ALARMS |
PRIMARY CLASSIFICATION C42 - CONSTRUCTING, ALTERING, OR IMPROVING COMMUNITY ANTENNA TELEVISION SYSTEMS
E-1 OWNER/BUILDER NOT TO EXCEED THREE STORIES
E-2 OWNER/BUILDER EXCEEDING THREE STORIES
