... can be Q235(mild steel), stainless steel.6).Treatment of surface: untreated or galvanized.7).US standard is also ... ,4mm, 5mmMaterialQ235,SS304,SS316Surface treatmentBlack , hot dip galvanizing,paintFields of ApplicationPlatforms ,sidwalks,filter grates,ventilation grates,driling stages, ladder steps ... ,framedgrates,trash rack grates ,paint backing chambers…… Galvanized High tower fan-shaped plarform