... 40mm 5.Used in flooring,walkway Galvanized steel grating The plain galvanized steel grating commonly used on bridge,refinery ,power ... and I bars.5).Material can be Q235(mild steel), stainless steel.6).Treatment of surface: untreated or galvanized.7). ... of ApplicationPlatforms ,sidwalks,filter grates,ventilation grates,driling stages, ladder steps,ditch grates,fences,framedgrates,trash rack grates ,paint ...