4Z CONTRACTORS LLC

Commercial and Institutional Building Construction

This category includes establishments primarily responsible for the construction (including new work, additions, alterations, maintenance, and repairs) of commercial and institutional buildings and related structures, such as stadiums, grain elevators, and indoor swimming facilities. This industry includes establishments responsible for the on-site assembly of modular or prefabricated commercial and institutional buildings. Included in this industry are commercial and institutional building general contractors, commercial and institutional building for-sale builders, commercial and institutional building design-build firms, and commercial and institutional building project construction management firms.

Illustrative Examples:

Airport building construction
Office building construction
Arena construction
Parking garage construction
Barrack construction
Prison construction
Farm building construction
Radio and television broadcast studio construction
Fire station construction
Grain elevator or bin construction
Data center construction
Religious building (e.g., church, synagogue, mosque, temple) construction
Restaurant construction
Hospital construction
School building construction
Hotel construction
Shopping mall construction
Indoor swimming facility construction
Warehouse construction (e.g., commercial, industrial, manufacturing, private)

Power and Communication Line and Related Structures Construction

Establishments in this category are primarly engaged in the construction of power lines and towers, power plants, and radio, television, and telecommunications transmitting/receiving towers. The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to power and communication line and related structures construction. All structures (including buildings) that are integral parts of power and communication networks (e.g., transmitting towers, substations, and power plants) are included.

Illustrative Examples:

Alternative energy (e.g., geothermal, ocean wave, solar, wind) structure construction
Power line stringing
Cellular phone tower construction
Radio transmitting tower construction
Co-generation plant construction
Satellite receiving station construction
Communication tower construction
Nuclear power plant construction
Telephone line stringing
Electric light and power plant (except hydroelectric) construction
Transformer station and substation, electric power, construction
Electric power transmission line and tower construction
Underground cable (e.g., fiber optic, electricity, telephone, cable television) laying

Land Subdivision

Establishments in this category are primarly engaged in servicing land and subdividing real property into lots, for subsequent sale to builders. Servicing of land may include excavation work for the installation of roads and utility lines. The extent of work may vary from project to project. Land subdivision precedes building activity and the subsequent building is often residential, but may also be commercial tracts and industrial parks. These establishments may do all the work themselves or subcontract the work to others. Establishments that perform only the legal subdivision of land are not included in this industry.

Highway, Street, and Bridge Construction

Establishments in this category are primarly engaged in the construction of highways (including elevated), streets, roads, airport runways, public sidewalks, or bridges. The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to highway, street, and bridge construction (e.g., installing guardrails on highways).

Illustrative Examples:

Airport runway construction
Highway line painting
Causeway construction
Painting traffic lanes or parking lot lines
Culverts, highway, road, and street, construction
Pothole filling, highway, road, street, or bridge
Elevated highway construction
Resurfacing, highway, road, street, or bridge
Guardrail construction
Sign erection, highway, road, street, or bridge

Other Heavy and Civil Engineering Construction

Establishments in this category are primarly engaged in heavy and civil engineering construction projects (excluding highway, street, bridge, and distribution line construction). The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to heavy and civil engineering construction projects (excluding highway, street, bridge, distribution line, oil and gas structure, and utilities building and structure construction). Construction projects involving water resources (e.g., dredging and land drainage), development of marine facilities, and projects involving open space improvement (e.g., parks and trails) are included in this industry.

Illustrative Examples:

Channel construction
Land drainage contractors
Dam construction
Marine construction
Dock construction
Microtunneling contractors
Dredging (e.g., canal, channel, ditch, waterway)
Nuclear waste disposal site construction
Earth retention system construction
Flood control project construction
Park ground and recreational open space improvement construction
Railroad construction
Golf course construction
Subway construction
Horizontal drilling (e.g., cable, pipeline, sewer installation)
Trenching, underwater
Hydroelectric generating station construction
Tunnel construction

Poured Concrete Foundation and Structure Contractors

Establishments in this category are primarly engaged in pouring and finishing concrete foundations and structural elements. This industry also includes establishments performing grout and shotcrete work. The work performed may include new work, additions, alterations, maintenance, and repairs.

Illustrative Examples:

Concrete pouring and finishing
Gunite contractors
Concrete pumping (i.e., placement)
Mud-jacking contractors
Concrete work (except paving)
Shotcrete contractors
Footing and foundation concrete contractors

Structural Steel and Precast Concrete Contractors

Establishments in this category are primarly engaged in (1) erecting and assembling structural parts made from steel or precast concrete (e.g., steel beams, structural steel components, and similar products of precast concrete) and/or (2) assembling and installing other steel construction products (e.g., steel rods, bars, rebar, mesh, and cages) to reinforce poured-in-place concrete. The work performed may include new work, additions, alterations, maintenance, and repairs.

Illustrative Examples:

Concrete product (e.g., structural precast, structural prestressed) installation
Rebar contractors
Erecting structural steel
Reinforcing steel contractors
Placing and tying reinforcing rod at a construction site
Structural steel contractors
Precast concrete panel, slab, or form installation

Roofing Contractors

Establishments in this category are primarly engaged in roofing. This industry also includes establishments treating roofs (i.e., spraying, painting, or coating) and installing skylights. The work performed may include new work, additions, alterations, maintenance, and repairs.

Illustrative Examples:

Painting, spraying, or coating, roof
Sheet metal roofing installation
Shake and shingle, roof, installation
Skylight installation

Other Building Finishing Contractors

Establishments in this category are primarly engaged in building finishing trade work (except drywall, plaster, and insulation work; painting and wall covering work; flooring work; tile and terrazzo work; and finish carpentry work). The work performed may include new work, additions, alterations, maintenance, and repairs.

Illustrative Examples:

Bathtub refinishing, on-site
Fabricating metal cabinets or countertops on site
Closet organizer system installation
Modular furniture system attachment and installation
Concrete coating, glazing, or sealing
Trade show exhibit installation and dismantling
Countertop and cabinet, metal (except residential-type), installation
Waterproofing contractors
Drapery fixture (e.g., hardware, rods, tracks) installation
Window shade and blind installation

All Other Specialty Trade Contractors

Establishments in this category are primarly engaged in specialized trades (except foundation, structure, and building exterior contractors; building equipment contractors; building finishing contractors; and site preparation contractors). The specialty trade work performed includes new work, additions, alterations, maintenance, and repairs.

Illustrative Examples:

Billboard erection
Outdoor swimming pool construction
Paver, brick (e.g., driveway, patio, sidewalk), installation
Crane rental with operator
Paving, residential and commercial driveway and parking lot
Sandblasting building exteriors
Fence installation
Scaffold erecting and dismantling
Interlocking brick and block installation
Steeplejack work
Manufactured (mobile) home set up and tie-down work
Driveway paving or sealing

Institutional Furniture Manufacturing

This includes establishments primarily engaged in manufacturing institutional-type furniture (e.g., library, school, theater, and church furniture). Included in this industry are establishments primarily engaged in manufacturing general purpose hospital, laboratory, and dental furniture (e.g., tables, stools, and benches). The furniture may be made on a stock or custom basis and may be assembled or unassembled (i.e., knockdown).

Exterminating and Pest Control Services

Establishments in this category are primarly engaged in exterminating and controlling birds, mosquitoes, rodents, termites, and other insects and pests (except for crop production and forestry production). Establishments providing fumigation services are included in this industry.

Landscaping Services

This category includes (1) establishments primarily engaged in providing landscape care and maintenance services and/or installing trees, shrubs, plants, lawns, or gardens and (2) establishments primarily engaged in providing these services along with the design of landscape plans and/or the construction (i.e., installation) of walkways, retaining walls, decks, fences, ponds, and similar structures.

Other Services to Buildings and Dwellings

Establishments in this category are primarly engaged in providing services to buildings and dwellings (except exterminating and pest control; janitorial; landscaping care and maintenance; and carpet and upholstery cleaning).

Illustrative Examples:

Building exterior cleaning services (except sandblasting, window cleaning)
Swimming pool cleaning and maintenance services
Chimney cleaning services
Ventilation duct cleaning services
Drain or gutter cleaning services

Solid Waste Collection

This includes establishments primarily engaged in one or more of the following: (1) collecting and/or hauling nonhazardous solid waste (i.e., garbage) within a local area; (2) operating nonhazardous solid waste transfer stations; and (3) collecting and/or hauling mixed recyclable materials within a local area.