... galvanized steel grating commonly used on bridge,refinery ,power plant,Sewage treatment plant and so on.Description:1) Bearing bar specification: 20 ... , 76, 100, 101.6Thickness(mm)3mm , 5mmMaterialQ235,SS304,SS316Surface treatmentBlack , hot dip galvanizing,paintFields of ApplicationPlatforms ,sidwalks,filter grates,ventilation grates,driling ...