... steel plate,etc2.Technique:steel grating is made by pressing and welding,surface treatment should be untreated,painted or hot dipped3 ... , covers the grille, stereo, road parking lot, organs, schools, factories and enterprises, stadiums, garden villas fences, but also can be used ... -88),UK: BS4592-1987, Australia: AS1657-1992, Japan:JIS Galvanized and Painted Steel Grating with standard size