Refrigeration & Air Conditioning Systems Mechanics plan, prepare, and lay out cooling and heating-cooling systems used in residential, commercial, institutional, or industrial settings. They install and start up refrigeration and air cooling systems; connect piping; and maintain, service, repair, and replace cooling system components and accessories.

Reinforcing Rodworkers reinforce concrete. To do this, they fabricate, handle, sort, cut, bend, rig, place, burn, weld and tie all materials used to reinforce the concrete, including steel. They then install the steel and accessories in the building of all types of concrete structures including bridges, reservoirs, buildings, sewers and highways.

Residential Air Conditioning Systems Mechanics prepare, install, maintain, and service residential air conditioning and heat pump systems. They work on any air conditioning system installed as an independent unit in a residential family dwelling. This equipment operates at less than 240V single-phase power with a maximum cooling capacity of 5 tons.

Low Rise Residential Sheet Metal Installers install sheet metal air-handling and ventilation systems in low-rise residential buildings without common air-conditioned areas. Specific work settings include self-contained single-family dwellings like detached, semi-detached, town, and linked homes with wood frame construction.

Restoration Masons do similar work to cement masons and bricklayers; however, their work is done on structures years after the original work was performed. Specialized Restoration Masons may repair and restore heritage buildings and monuments, including chimneys, smokestacks, foundations, furnaces, kilns, and forges.

Roofers install, repair, and replace roofing systems including conventional, inverted built-up, single-ply, and two-ply modified. They also perform damp, water, and weather-proofing, along with installing and repairing slate, tile, and shingles and resurfacing roofs.

Sheet metal workers fabricate, assemble, install, and repair sheet metal products.

Sprinkler System and Fire Protection Installers fabricate, install, test, maintain, and repair water, foam, carbon dioxide, and dry chemical sprinkler systems in buildings for fire protection purposes.

Steamfitter/Pipefitters lay out, assemble, fabricate, maintain, and repair piping systems carrying water, steam, chemicals, and fuel through heating, cooling, and lubricating systems.