... grating is mainly used for industrial platform, ladders, helps column, channel pedal, railway, high CeDao floor drain cap, platform scale, covers ... TreatmentBlack, self color, hot dip galvanized, painted, spray coating6Grating StylePlain / Smooth, Serrated /teeth, I bar, serrated I bar7StandardChina: YB/T 4001 ... , Australia: AS1657-1992, Japan:JIS Press Locked Steel Grating for channel pedal