... steel 2.Finish:powder coat,polish,zinc plated,acid pickling light galvanized u frame steel beams1.Strictly quality control by 100 ... press machine,1600T hydraulic press machine, CNC machinery center, CNC laser-cut machine, CNC flame-cut machine, CNC bending machine, CNC ... cutting machine, hacksaw cutting machine, rolling machine and so on. light galvanized u frame steel beams