... StandardASTM A36, A1011, A569, Q235Grating ProductsSteel Grating, plain and serrated grating, trench grate, stair treadGrating Surface:Hot dip Galvanized, PaintingGrating Specification:19-w-4, 15 ... /100, 40/50, 60/100 and allGrating Application:steel platform, flooring and walkway, trench cover, stair tread contact personMichelle Gao Hot dipped galvanized steel grating