... , 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc; I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etcUS standard: 1''x3/16'', 1 1/4''x3 ... .3, 35, 38.1, 40, 41.25, 60, 80mm etcUS standard: 19-w-4, 15-w-4, 11-w-4, 19 ... dip galvanized, painted, spray coating6Grating StylePlain / Smooth, Serrated /teeth, I bar, serrated I bar7StandardChina: YB/T 4001.1-2007, USA: ANSI/NAAMM ...