... of non-serrated gratings.MaterialsMild steel (Low carbon steel ASTM (A36) or Q235), stainless steel 304 or 316.Surface treatmentUntreated, ... A:ASTM(A123), U.K:BS729Applicationplatform, floor, walkway, fence, They widely used in steel structure platforms, stair treads, sidewalks, ... drainages and well covers etc. We also supply standard steel grating and non-standard grating as customers? demands.Friendly ...