Nucor manufactures steel and steel products. Co. has three segments: steel mills, which produces sheet steel, plate steel, structural steel and bar steel; steel products, which produces hollow structural section steel tubing, electrical conduit, steel racking, steel joists and joist girders, steel deck, fabricated concrete reinforcing steel, cold finished steel, steel fasteners, metal building systems, insulated metal panels, steel grating and expanded metal, and wire and wire mesh; and raw materials, which produces direct reduced iron (DRI), brokers ferrous and nonferrous metals, pig iron, hot briquetted iron and DRI, supplies ferro-alloys, and processes ferrous and nonferrous scrap metal.