This all-inclusive class code includes businesses that provide residential and commercial (up to three-stories) heating, ventilation, air conditioning and refrigeration installation, service or repair. Related services like wiring and sheet metal work associated with HVAC systems are also included.

This code applies to lumberyard employees and dealers engaged in selling and distributing other new building materials, including sand, gravel, lumber, finished millwork, roofing materials, plumbing and more.

This workers’ compensation class code applies to employees of building material dealers, home improvement centers and lumberyards who engage with store operations.

This code includes all employers engaged in the erection or installation of metal or metal-covered doors or door frames. This classification also applies to the erection of railings or fencing above the first-story level.

This class code applies to installing wallboard, sheetrock, drywall, plasterboard or cement board in private or *commercial residences, including drywall framing, the taping of seams or joints, application of joint compound and sanding. This also includes the installation of light gauge steel by wallboard installation contractors or specialty contractors.

*Commercial residences must be three stories and under.

This applies to employers engaged in any ground-supported paving or repaving involving flat work with cement or concrete and performed on streets, roads, floors, driveways, yards, parking lots, sidewalks or airport runways.

This code applies to employers engaged in masonry work for residential, commercial and industrial construction, utilizing brick, cinder block, concrete, cement, stone, slate, lime, marble and glass blocks. The classification does not include the building of forms or the pouring of concrete.

This code applies to specialist contractors and employers installing tiles made from stone, mosaic, terrazzo or ceramic onto interior walls and floors and who perform tile, stone, mosaic or marble work.

This code covers general carpentry work not otherwise classified in the Basic Manual. Operations include but are not limited to, the construction of wooden bridges and decks, the setup of gazebos and trellises, the setup of plastic playground equipment, and carpentry repair work involving termite control.

This code applies to commercial concrete operations, including the construction of buildings, locks, self-bearing floors, dams, foundations, grain elevators, piers and silos. It also includes form erecting, steel reinforcements and form stripping.