... Steel Custom Size Are Acceptable Steel Grating, Bar Grating, Serrated Steel Bar Grating, Flooring GratingMaterial:Mild steel: ASTM ... lockedSurface treatment: painted, galvanized, untreatedStandard of steel grating:Countries National standardsMaterials Galvanizeing standardsChina YB/T 4001. ... AS 1657-1992AS 3679AS 1650Specification of steel grating::NoBearing bar pitchCross bar pitchSpecification of ...