... iron floor grating steel ladder galvanized steel floor gratings serrated bar grating ISO STEEL GRATING MANUFACTURER & EXPORTER. STEEL GRATING SPECIALIST ... -w-4, 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76, 80, 100, 101.6, ... painted, spray coating 6Grating StylePlain / Smooth, Serrated /teeth, I bar, serrated I bar 7StandardChina: YB/T 4001.1-2007, USA: ANSI/NAAMM ...