... frame steel beams 1. Material:carbon steel 2.Finish:powder coat,polish,zinc plated,acid pickling light galvanized u frame steel beams1. ... fifth wheel, lift platform, garage, hardware, crane partsMaterialcarbon steel, stainless steel, aluminum alloy, copperProcedurewelding,stamping,cutting,punching,bending,grinding,machining, ... rolling machine and so on. light galvanized u frame steel beams