... Finish:powder coat,polish,zinc plated,acid pickling light galvanized u frame steel beams1.Strictly quality control by 100% inspection2. ... ,machining,threadingSurface finishingzinc plating, hot dipped galvanized, powder coat, e-coat, polishing,chrome plated,nickel platedAdvanced equipments2000T hydraulic press machine ... cutting machine, rolling machine and so on. light galvanized u frame steel beams