Commercial, Industrial, Marine Sheet Work & Fabricating. Metal Building Roof repair. PSM carries a large stock of Galvanized Carbon Steel, Stainless Steel, Copper and Aluminum Sheets, Flat Bar, Rod, Angle and Tubing. Shearing capability for carbon steel, stainless steel and aluminum. Press Break capability Roll and Angle Roll capability. We also have the capability to roll flat bar, square bar, square, rectangular tubing, H Beam and channel.