Metal fabrication is a value added process of metal structures by cutting, bending/rolling, machining, surface treatment and assembling processes. Metal fabrication process usually start with item drawings (accuracy and workpiece dimension) then move to the metal fabrication stage and finally to the installation of the final project. The commonly raw materials used by metal fabricators are includes plate/sheet metal, formed and expanded metal, metal tube/pipe, welding wire/welding rod, etc.