Section R4-9-102. Commercial Contractor License Classifications and Scopes of Work

A.       Commercial contractor license classifications. License classi- fications for commercial contractors are as follows:

ENGINEERING CONTRACTING

A                    General Engineering

A-4               Drilling

A-5               Excavating, Grading and Oil Surfacing A-7          Piers and Foundations

A-9          Swimming Pools

A-11        Steel and Aluminum Erection A-12      Sewers, Drains and Pipe Laying A-14     Asphalt Paving

A-15            Seal Coating

A-16            Waterworks

A-17            Electrical and Transmission Lines A-19               Swimming Pools, Including Solar

GENERAL COMMERCIAL CONTRACTING

B-1                General Commercial Contractor

B-2                General Small Commercial Contractor

SPECIALTY COMMERCIAL CONTRACTING

C-4         Boilers, Steamfitting and Process Piping C-6         Swimming Pool Service and Repair

C-9         Concrete

C-11       Electrical

C-16       Fire Protection Systems C-27               Lightweight Partitions C-37     Plumbing

C-39       Air Conditioning and Refrigeration C-49              Refrigeration

C-53       Water Well Drilling

C-58       Comfort Heating, Ventilating, Evaporative Cooling

C-74       Boilers, Steamfitting and Process Piping, Including Solar

C-77           Plumbing Including Solar

C-78           Solar Plumbing Liquid Systems Only

C-79           Air Conditioning and Refrigeration, Including Solar

B.       Commercial contracting scopes.  The scope of  work which may be done under the commercial contracting license classi- fications is as follows:

A-      GENERAL ENGINEERING

This  classification  allows  the  licensee to construct  or repair:

1.        Fixed works

2.        Streets

3.        Roads

4.        Power and utility plants

5.        Dams

6.        Hydroelectric plants

7.        Sewage and waste disposal plants

8.        Bridges

9.        Tunnels

10.     Overpasses

11.     Public parks

Also included are the scopes of work allowed by the A-4 through A-19 and CR-2 through CR-80 classifications.

This classification does not include work authorized by the B-1, B-2, B-, or B-3 scopes.

A-4               DRILLING

Drilling includes horizontal and vertical drilling or boring, constructing, deepening, repairing, or aban- doning wells; exploring for water, gas, and oil; and constructing dry wells, and monitor wells. Also included is the erection of rigs, derricks and related substructures, and installation, service and repair of pumps and pumping equipment.

A-5               EXCAVATING, GRADING AND OIL SURFACING

This classification allows the licensee to apply oil surfacing or other similar products; place shoring, casing, geotextiles or liners; and perform incidental blasting or drilling as required for the licensee to move, alter, or repair earthen materials by:

1.        Digging

2.        Trenching

3.        Grading

4.        Horizontal boring

5.        Compacting

6.        Filling

This license does not allow the licensee to excavate for water, gas or oil wells.

A-7          PIERS AND FOUNDATIONS

Installation of piers and foundations using concrete, rebar, post tension and other materials common to the industry. Includes pile driving, excavation, form- ing and other techniques and equipment common to the industry.

A-9          SWIMMING POOLS

Construction, service, and repair of swimming pools and spas, including water and gas service lines from point of service to pool equipment, wiring from pool equipment to first readily accessible disconnect, pool piping, fittings, backflow prevention devices, waste lines, and other integral parts of a swimming pool or spa.

Also included is the installation of swimming pool accessories, covers, safety devices, and fencing for protective purposes, if in the original contract.

A-11            STEEL AND ALUMINUM ERECTION

Field fabrication, erection, repair, and alteration of architectural and structural steel and aluminum materials common to the industry, including field layout, cutting, assembly, and erection by welding, bolting, wire tying or riveting.

A-12            SEWERS, DRAINS AND PIPE LAYING

Installation and repair of any project involving sewer access holes, the laying of pipe for storm drains, water and gas lines, irrigation, and sewers. Includes connecting sewer collector lines to building drains and the installation of septic tanks, leach lines, dry wells, all necessary connections, liners and related excavating and backfilling.

A-14            ASPHALT PAVING

Installation of asphalt paving, and all related fine grading on streets, highways, driveways, parking lots, tennis courts, running tracks, play areas, and gas station driveways and areas, using materials and accessories common to the industry. Includes the

necessary excavation and grading only for height adjustment of existing sewer access holes, storm drains, water valves, sewer cleanouts, and drain gates. Also included is the scope of work allowed by the A-15 Seal Coating Classification.

A-15            SEAL COATING

Application of seal coating to asphalt paving sur- faces. Includes repair of surface cracks and applica- tion of painted marking symbols.

A-16            WATERWORKS

All work necessary for the production and distribu- tion of water including drilling well, setting casing and pump, related electrical work, related concrete work, excavation, piping for storage and distribu- tion, storage tanks, related fencing, purification and chlorination equipment.

A-17            ELECTRICAL AND TRANSMISSION LINES

Installation, alteration, and repair of transmission lines on public right-of-ways, including erection of poles, guying systems, tower line erection, street lighting of all voltages, and all underground systems including ducts for signal, communication, and simi- lar installations. Installing transformers, circuit breakers, capacitors, primary metering devices and other related equipment of all electrical construction is included.

All electrical systems of less than 600 volts on or inside a building are excluded.

A-19        SWIMMING POOLS, INCLUDING SOLAR

Construction, service, and repair of swimming pools and spas, with or without solar water heating devices, including water and gas service lines from point of service to pool equipment, wiring from pool equipment to first readily accessible disconnect, pool piping, fittings, backflow prevention devices, waste lines and other integral parts of a swimming pool, spa and attached solar water heating device.

Also included are swimming pool accessories, cov- ers, safety devices, and fencing for protective pur- poses, if in the original contract.

B-1                GENERAL COMMERCIAL CONTRACTOR

Construction, alteration, and repair in connection with any structure built, being built, or to be built for the support, shelter, and enclosure of persons, ani- mals, chattels, or movable property of any kind. This scope includes the supervision of all or any part of the above and includes the management, or direct or indirect supervision of any work performed.

Also included are the scopes of work allowed by the CR-2 through CR-80 license classifications. Work related to electrical, plumbing, air conditioning sys- tems, boilers, swimming pools, spas and water wells must be subcontracted to an appropriately licensed contractor. This classification does not include work authorized by the A-, B-, or B-3 scopes.

B-2                GENERAL SMALL COMMERCIAL CONTRACTOR

Small commercial construction in connection with any new structure or addition built, being built, or to be built for the support, shelter and enclosure of per- sons, animals, chattels or movable property of any kind for which the total amount paid to the licensee

does not exceed $750,000. This scope includes the supervision of all or any part of the above and includes the management or direct or indirect super- vision of any work performed.

Also included are the scopes of work allowed by the CR-2 through CR-80 license classifications. Work related to electrical, plumbing, air conditioning sys- tems, boilers, swimming pools, spas and water wells must be subcontracted to an appropriately licensed contractor. This classification does not include work authorized by the A-, B-, or B-3 scopes.

C-4         BOILERS, STEAMFITTING AND PROCESS PIPING

Installation, alteration, and repair of steam and hot water systems and boilers, including chimney con- nections, flues, refractories, burners, piping, fittings, valves, thermal insulation, and accessories; fuel and water lines from source of supply to boilers; process and specialty piping and related equipment; pneu- matic and electrical controls.

If necessary, a new circuit may be added to the exist- ing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.

C-6         SWIMMING POOL SERVICE AND REPAIR

Service, replacement, and repair of swimming pools including all existing connections and equipment. Pool gas heaters and gas piping from meter to heater may be installed only if the existing line and gas supply are adequate.

Application of pool coatings to interior of pool in conjunction with minor repairs to pool tile, plaster, and decks.

Excluded are chlorine gas connections, connections to potable water, and electric connections beyond first readily accessible disconnect. This classifica- tion excludes a complete replacement of plaster or pebble pool interiors and decks.

C-9         CONCRETE

All work in connection with the processing, propor- tioning, batching, mixing, conveying, and placing of concrete composed of materials common to the con- crete industry, including finishing, coloring, curing, repairing, testing, drilling, sawing, grinding, chip- ping, and grouting. Placing film barriers, sealing, and waterproofing are included.

Construction, centering, and assembling forms, molds, insulating concrete forms, slipforms, and pans.

Trenching, excavating, backfilling, and grading in connection with concrete construction.

Installation of embedded items essential to or com- prising an integral part of the concrete or concrete construction, including reinforcing elements and accessories.

C-11       ELECTRICAL

Installation, alteration, and repair of any wiring, related electrical material and equipment used in the generating, transmitting, or utilization of electrical energy less than 600 volts, including all overhead electrical wiring on public right-of-ways for signs and street decorations, and all underground electrical

distribution systems of less than 600 volts serving private properties.

Installation, alteration, and repair on other than pub- lic right-of-ways of all outside, overhead, and under- ground electrical construction and all wiring in or on any building of less than 600 volts.

C-16       FIRE PROTECTION SYSTEMS

Installation, alteration, and repair of fire protection systems using water, steam, gas, or chemicals. Included is any required excavation, trenching, backfilling and grading, piping from structure, and connections to off-premise water supply adjacent to property involving a fire protection system.

Systems may include the following areas of work and related equipment: restaurant hood protection systems; fire pumps and drivers; pressure and stor- age tanks; all piping and valves; sprinkler heads and nozzles; and application of materials for the preven- tion of corrosion or freezing.

Also included are air compressors, air receivers, bot- tled inert gases, pressurized chemicals, manifolds, pneumatic, hydraulic, or electrical controls, low voltage signaling systems, control piping, and the flushing and testing of systems.

C-27       LIGHTWEIGHT PARTITIONS

Installation of lightweight (not to exceed 14 gauge) metal wall partitions, including suspended metal ceiling grid systems, as supporting members for the application of building materials such as: application and repair of gypsum plaster, cement, acoustical plaster, or a combination of materials and aggre- gates, that create a permanent coating; the applica- tion of such materials over any surface which offers either a mechanical or suction type bond, sprayed, dashed, or troweled to the surface; surface sand- blasting preparatory to plastering or stucco; installa- tion of plastering accessories and lath products manufactured to provide a key or suction type bond for the support of various type plaster coatings; and installation and repair of gypsum wall board, point- ing, accessories, taping, and texturing on structures both interior and exterior.

Upon the effective date of these rules, no new appli- cations for the C-27 classification will be accepted and no new C-27 licenses will be issued.

C-37       PLUMBING

Installation, alteration, and repair of all plumbing when performed solely within property lines and not on public easements or right-of-ways, except as hereinafter provided.

Installation, alteration, and repair of all piping, fix- tures, and appliances related to water supply, includ- ing pressure vessels and tanks (excluding municipal or related water supply systems); venting and sani- tary drainage systems for all fluid, semifluid, and organic wastes; septic tanks and leaching lines; roof leaders; lawn sprinklers; water conditioning equip- ment; piping; and equipment for swimming pools.

Also included are piping, fixtures, appliances, and pressure vessels for manufactured and natural gases, compressed air and vacuum systems, petroleum, fuel oil, nonpotable liquids, hot water heating, and hot water  supply  systems   operating  at  pressures  not

exceeding 30 PSIG, or temperatures not exceeding 220° F; steam heating and steam supply systems not exceeding 15 PSIG operating pressure; gas or oil fired space heaters and furnaces, excluding duct work. Piping for water cooling systems, excluding the refrigerant piping and equipment. Testing and balancing of hydronics systems.

Sewer, gas, water lines, and connections from struc- ture to the nearest point of public supply or disposal may cross public or private easements or be installed within private easements or right-of-ways. Pipe installed across public property may not be increased in size, or make any other connection between the point of exit from private property to the point of connection at public supply or disposal. These lines shall not be installed parallel to main lines in public easements or right-of-ways.

C-39       AIR CONDITIONING AND REFRIGERATION

Installation, alteration,  and repair of  refrigeration and evaporative cooling systems.

Installation, alteration, and repair of heating systems of “wet”, “dry” or radiant type. “Wet” systems include steam or hot water boilers and coils, or base- board convectors, and are limited to 30 PSIG operat- ing pressure of 220° F for hot water and 15 PSIG operating pressure for steam. Dry systems include gas fired furnaces and space heaters.

Installation, alteration, and repair of ventilation sys- tems includes duct work, air filtering devices, water treatment devices, pneumatic or electrical controls, and control piping. Thermal and acoustical insula- tion of refrigerant pipes and ductwork, vibration iso- lation materials and devices, liquid fuel piping and tanks, water and gas piping from service connection to the equipment it serves. Testing and balancing of refrigerant, cooling, heating circuits, and air han- dling systems.

If necessary, a new circuit may be added to the exist- ing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.

C-49       REFRIGERATION

Installation, alteration,  and repair of  refrigeration equipment and systems used for processing, storage, and display of food products and other perishable commodities.

Includes commercial, industrial, and manufacturing processes requiring refrigeration excluding comfort air conditioning.

Systems may also include the following areas of work and related equipment: temperature, safety and capacity controls, thermal insulation, vibration isola- tion materials and devices; water treatment devices; construction and installation of walk-in refrigeration boxes, liquid fuel piping and tanks, water and gas piping from equipment to service connection; and testing and balancing of refrigeration equipment and systems.

If necessary, a new circuit may be added to the exist- ing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.

C-53       WATER WELL DRILLING

Drill new water wells or deepen existing water wells by use of standard practices including the use of cable tools, compressed air percussion, rotary, air rotary, or reverse circulation rotary methods. Includes installing casing, gravel pack, perforating and sanitary seals. Repair existing wells by sand pumping, jetting, acidizing, swabbing, clean out, reperforating, swaging, installation of  annealed lines, and the removal of debris.

Includes photographing interior of wells with appro- priate equipment. Installation of jet and submersible pumps; electrical pump controls and wiring from pump equipment to first readily accessible discon- nect; and water line to storage or pressure tank, not to exceed 50 linear feet. Use of a test pump to develop a new well, or repair an existing well, when provided in contract, is limited to 5 horsepower.

Installation of concrete pump bases not to exceed 50 square feet.

Installation of protective fencing when included in original contract.

C-58       COMFORT HEATING, VENTILATING, EVAPORATIVE COOLING

Installation, alteration, and repair of warm air heat- ing systems, gas fired furnaces and space heaters, ventilation and evaporative cooling units, or any combination of these.

Systems may include the following areas of work and related equipment; duct work, air filtering devices, pneumatic or electrical controls, control piping, thermal and acoustical insulation, vibration isolation materials and devices, liquid fuel piping and tanks, water and gas piping from service con- nection to equipment it serves. Testing and balanc- ing of air handling systems.

If necessary, a new circuit may be added to the exist- ing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.

C-74       BOILERS, STEAMFITTING AND PROCESS PIPING, INCLUDING SOLAR

Installation, alteration, and repair of steam and hot water systems and boilers including solar. Also included are chimney connections, flues, refracto- ries, burners, piping, fittings, valves, thermal insula- tion and accessories; fuel and water lines from source of supply to boilers; process and specialty piping and related equipment; pneumatic and electri- cal controls.

If necessary, a new circuit may be added to the exist- ing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.

C-77           PLUMBING INCLUDING SOLAR

Installation, alteration, and repair of all plumbing including solar, when performed solely within prop- erty lines and not on public easements or right-of- ways except as hereinafter provided.

Installation, alteration, and repair of all piping, fix- tures and appliances related to water supply, includ- ing pressure vessels and tanks (excluding municipal or related water supply systems); venting and sani- tary drainage systems for all fluid, semifluid, and organic wastes; septic tanks and leaching lines; roof

leaders; lawn sprinkler systems; water conditioning equipment; piping and equipment for swimming pools.

Also included are piping, fixtures, appliances, and pressure vessels for manufactured and natural gases, compressed air and vacuum systems, petroleum, fuel oil, nonpotable liquids, hot water heating and hot water supply systems operating at pressures not exceeding 30 PSIG or temperatures not exceeding 220° F; steam heating and steam supply systems not exceeding 15 PSIG operating pressure; gas or oil fired space heaters and furnaces excluding duct work. Piping for water cooling systems, excluding the refrigerant piping and equipment. Testing and balancing of hydronics systems.

Sewer, gas, water lines, and connections from struc- ture to the nearest point of public supply or disposal may cross public or private easements or be installed within private easements. Pipe installed across pub- lic property may not be increased in size or make any other connection between the point of exit from private property to point of connection at public sup- ply or disposal. These lines shall not be installed parallel to main lines in public easements or right- of-ways.

C-78           SOLAR PLUMBING LIQUID SYSTEMS ONLY

Installation, alteration, and repair of solar water heating systems operating at temperatures not exceeding 220° F, including thermosyphon, direct (open loop), and indirect (closed loop), but excludes air as a transfer medium.

Includes installation of collectors, storage and expansion tanks, heat exchangers, piping valves, pumps, sensors and low voltage controls which con- nect to existing plumbing and electrical stubouts at the water tank location.

Installation of solar water heating systems for swim- ming pools which tie into and operate from the con- ventional pool systems, but excludes all non-solar plumbing, electrical  and mechanical systems and components.

Installation of backup and auxiliary heating systems only when such systems are included in the original contract and when such systems are an integral part of the solar collector or storage equipment.

C-79           AIR CONDITIONING AND REFRIGERATION INCLUDING SOLAR

Installation, alteration,  and repair of  refrigeration and evaporative cooling systems, including solar.

Installation, alteration, and repair of heating systems of “wet”, “dry” or radiant type. “Wet” systems include steam, or hot water boilers and coils, or baseboard convectors and are limited to 30 PSIG operating pressure of 220° F for hot water and 15 PSIG operating pressure for steam. Dry systems include gas fired furnaces and space heaters.

Installation, alteration, and repair of ventilation sys- tems.

Installation of these systems include duct work, air filtering devices, water treatment devices, pneumatic or electrical controls, and control piping. Thermal and acoustical insulation, vibration isolation materi- als and devices, liquid fuel piping and tanks, and

water and gas piping  from service connection  to equipment it serves. Testing and balancing of refrig- erant, cooling and heating circuits, and air handling systems.

If necessary, a new circuit may be added to the exist- ing service panel or sub-panel. Excluded is the installation of a new service panel or sub-panel.

Historical Note

Former Rule 2. Amended effective May 20, 1975, Amended effective June 13, 1975, Amended effective August 8, 1975, Amended effective August 25, 1975

(Supp. 75-1). Amended effective January 9, 1976, sub- section (B) of this Section R4-9-02 renumbered as Sec- tion R4-9-03 effective February 23, 1976 (Supp. 76-1).

Amended effective October 14, 1977 (Supp. 77-5).

Amended effective September 13, 1978 (Supp. 78-5). Amended by adding A-20 effective July 10, 1980; adding A-21 effective July 11, 1980; adding C-77 and C-78 effective July 28, 1980; adding C-74 and C-79 effective August 15, 1980; adding C-75 and C-80 effective August 19, 1980 (Supp. 80-4). Amended by adding A-19 effec-

tive September 5, 1980 (Supp. 80-5). Repealed effective

April 18, 1984 (Supp. 84-2). New Section R4-9-02 adopted effective July 9, 1987, and renumbered as Sec- tion R4-9-102 (Supp. 87-3). Amended effective January 20, 1998 (Supp. 98-1). Amended by final rulemaking at

20 A.A.R. 568, effective July 1, 2014 (Supp. 14-1).