... Finish:powder coat,polish,zinc plated,acid pickling light galvanized u frame steel beams1.Strictly quality control by 100% inspection2. ... wheel, lift platform, garage, hardware, crane partsMaterialcarbon steel, stainless steel, aluminum alloy, copperProcedurewelding,stamping,cutting,punching,bending,grinding,machining ... cutting machine, rolling machine and so on. light galvanized u frame steel beams