International Union of Bricklayers and Allied Craftworkers (BAC) BAC represents an array of skilled workers who practice the crafts of bricklaying, plastering, tile setting, plastering, stone, marble and cement masonry, and terrazzo and mosaic work. Website: www.bacweb.org

International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers (Boilermakers) The Boilermakers build and repair all types of seaworthy vessels as well as cranes, boilers, tanks, pressure vessels, heavy plates and structural fabrications. Website: www.boilermakers.org

United Union of Roofers, Waterproofers and Allied Workers (Roofers) Members of the Roofers union install new roofs and remove old roofs using a variety of materials. Waterproofers install moisture-resistant products on belowgrade structures and other surfaces to prevent water intrusion into buildings. Website: www.unionroofers.com

International Brotherhood of Electrical Workers (IBEW) The IBEW represents workers in the electrical industry, including construction, gas and electric utilities, telecommunications, railroads and government agencies. Website: www.ibew.org

International Association of Heat and Frost Insulators and Asbestos Workers (Asbestos Workers) Members apply insulation to pipes, tanks, boilers, ducts, refrigeration equipment and other surfaces requiring thermal control of temperatures. Asbestos workers also do removal of asbestos-containing material. Website: www.insulators.org

International Association of Bridge, Structural, Ornamental and Reinforcing Iron Workers (Iron Workers) Iron Workers assemble and erect steel framework and other metal parts in buildings and on bridges, dams, skyscrapers, factories and other steel structures. Website: www.ironworkers.org

International Union of Operating Engineers (IUOE) IUOE members work as stationary engineers in building and industrial complexes. As operating engineers, they use heavy construction equipment, such as cranes and bulldozers in constructing buildings, dams, airports and highways. Website: www.iuoe.org

Laborers’ International Union of North America (LIUNA) LIUNA is a diverse union that includes workers in construction and environmental remediation. Members help lay down new highways, build bridges, dig tunnels and subways, build new plants, factories, dams and power plants and erect new schools, churches, hospitals and houses. Website: www.liuna.org

Sheet Metal Workers’ International Association (SMWIA) Members work in several industries. They fabricate, install and service heating, venting and air-conditioning systems; blowpipe and industrial systems; metal roofing; coping and flashing; and stainless steel work for restaurants, kitchens and hospitals. Website: www.smwia.org

United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada (United Association or UA) UA is a multi-craft union that represents plumbers and pipe, sprinkler, and refrigerator fitters, as well as service technicians. All of these jobs require the installation, remodeling or maintenance of systems that carry water, steam, air and other liquids or gases. Website: http:www.ua.org

International Union of Elevator Constructors (IUEC) IUEC members assemble, install and replace elevators, escalators, dumbwaiters, moving walkways and similar equipment in new and old buildings. Elevator constructors also maintain and repair this equipment. Website: www.iuec.org

International Union of Painters and Allied Trades (IUPAT) IUPAT members work in one or more of several crafts: painting, wallpaper hanging, glazing (glass work), drywall and taping, floor covering, and sign and display work. Website: www.iupat.org

International Brotherhood of Teamsters (IBT) The Teamsters union has several divisions, including a Building Material and Construction Trades Division. Most members in this division are truck drivers who transport and haul material. Website: www.teamster.org

Operative Plasterers’ and Cement Masons’ International Association of the United States and Canada (OP&CMIA) The union represents skilled plasterers, cement masons, and shophands who work on a variety of engineering projects including office buildings, bridges, canals, dams, reservoirs and roads. Website: www.opcmia.org