... , hot dip Galvanizing and stainless steel grating.2)Usage: flooring walkway, platform ,steel structures, stair tread, well cover, trench cover, sump ... gratings, storage shelves, ladder, fences and handrail so on for construction project, oil project, seaport, power plant, water plant, defense project ... /60/50G555/60/50G605/60/50 Hot dipped serrated galvanized construction material (manufacturer)