... bar grating:1.) Processing technic:Steel grating is made by bearing bar and cross bar according to the flat-steel ... weft arrangement, in high-pressure spacing on resistance welder welded by cutting, incision, opening, overlock process such as ... guardrail etc. 4.)Material: Carbon steel, Stainless steel ,and so on .5.)Surface treatment:Plain ,not treated,Hot-dipped-galvanized ,electro ...