... steel grating,plain steel grating.walkway grating,trench coverThe plain galvanized steel grating commonly used on bridge,refinery ,power plant,Sewage ... mild steel), stainless steel.6).Treatment of surface: untreated or galvanized.7).US standard is also in our production area.Grating ... ,ditch grates,fences,framedgrates,trash rack grates ,paint backing chambers…… Galvanized High tower fan-shaped plarform