Sheet Metal Workers International Association
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About SMWIA Local 546The Sheet Metal Workers International Association (SMWIA) represents over 150,000 skilled craftpersons in the unionized sheet metal industry throughout the United States, Canada, and Puerto Rico. Sheet Metal Workers perform architectural metal work, installation and service of heating, ventilating and air conditioning systems, shipbuilding and much more.
Local Unions in PORTSMOUTH, NHAPWU Local 355, UA Local 788, NALC Local 161, LIUNA Local 976, UBC Local 3073, IBEW Local 2071, ILA Local 1947, AFGE Local 2024, CWA Local 1400