... GB1220-92 implementation.or as your requirements USES Galvanized steel grating used in alloys, building materials, power plants, boilers, ... mainly used for industrial platform, ladder pedal, balustrade, channel floor, side road railway bridge, aerial platforms, drainage ditch cover ... self colour, hot dip galvanized, painted, spray coating 6 Grating Style Plain / Smooth, Serrated /teeth, I bar, serrated ...