... industry, metallurgy industry, machinery industry, shipbuilding, harbor, oceanographic engineering, building, paper mills, cement plant, medicine, spinning and weaving, foodstuff factory, transportation, municipal ... , paintedStandardsChina: YB/T 4001.1-2007USA: ANSI/NAAMM(MBG531-88)UK: BS4592-1987Australia: AS 1657-1985 terrace Steel Grating(walkway)