stair tread , steel tread , metal tread , grating ladder , grating steel ladder with nosing or not metal stair with fixi We produce three kinds of steel gratings, they are Plain Style Steel Grating, Serrated Style Steel Grating and I Bar Type Steel Grating. They are widely used in steel structure platforms, stair treads, sidewalks, drainages and well covers etc. We can design and manufacture ...