... .5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc; I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etcUS standard: 1''x3/16 ... dip galvanized, painted, spray coating6Grating StylePlain / Smooth, Serrated /teeth, I bar, serrated I bar7StandardChina: YB/T 4001.1-2007, USA: ANSI/NAAMM ... ),UK: BS4592-1987, Australia: AS1657-1992, Japan:JIS6.Production picture 7.Application: