... :3-10mm width:0.5-2.5m galvanized steel bar grating weight hot sale and hot scheduling Material: Mild (low carbon) steel ... production standards YB-T4001-1998 Steel Grating Standardizations: CountriesNational Standards for GratingMaterialsGalvanizing Standards ChinaYB/T 4001.1-2007GB 700-88GB/T13912 ... /4''x1/8'', 11/2''x1/8''etc 2Bearing Bar Pitch12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3 ...