... :2000 2.Hot dip galvanized steel grating, bar grating, stair treads,Ditch cover , tank grating , pavement grating , Steel ... Grating,Bar Grating,Ditch Covert, Stair Tread,pavement gratingWe produce three kinds of steel gratings, they ... are widely used in steel structure platforms, stair treads, sidewalks, drainages and well covers etc. We can design and manufacture ...