... used steel gratings, the bearing bar comes in the form of a plain surface flat bar commonly used for platforms, ... and 50,100mm are recommended.4> The Maximum length of black panel is 7350mm5> Materials:mild steel or ... 4mm, 5mmMaterialQ235,SS304,SS316Surface treatmentBlack , hot dip galvanizing,paintFields of ApplicationPlatforms ,sidwalks,filter grates,ventilation grates,driling stages, ladder ...