... :HDGalvanizing,Black ISO9001-2008 & Steel Grati iron floor grating steel ladder galvanized steel floor gratings serrated bar grating ISO STEEL GRATING ... -2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76, 80, 100, 101.6, 120mm, 2'' & 4'' etc ... : AS1657-1985, Japan:JIS galvanized iron floor grating,galvanized steel ladder.serrated bar grating,galv serrated grating,anti slp grating