This minor group includes machinists, machining and tooling inspectors, tool and die makers, sheet metal workers, boilermakers, structural metal and platework fabricators and fitters, iron workers, welders and related machine operators. They are employed by machinery, equipment, vehicle, aircraft, shipbuilding and other metal products manufacturers; construction and electric power generation companies; tool and die, mould making, welding and machine shops; structural steel, boiler, sheet metal and platework fabrication plants; and by construction ironwork, sheet metal work and welding contractors; or they may be self-employed.
