GALLERY A Journeyman Sheet Metal Worker MIG Welding Steel. Journeymen Sheet Metal Workers Fabricating Round Duct from Galvanized Steel. A Journeyman Sheet Metal Worker Fabricating Round Duct from Galvanized Steel. A Journeyman Sheet Metal Worker Fabricating a Square-to-Round from Galvanized Steel. Sheet Metal Projects Removal of an old Trane HVAC rooftop unit. (pic. courtesy of J.A. Fritch and Sons)