... arranged and welded into the middle of a square lattice with an iron and steel products, steel mesh monoblock Main use to do ... so that it has a high load, the structure of light, easy lifting; shape beautiful, durable, hot-dip zinc surface treatment so ... Grating, plain and serrated grating, trench grate, stair treadGrating Surface:Hot dip Galvanized, PaintingGrating Specification:19-w-4, 15-w-2, 30/100 ...