Grating is flat steel bar according to a certain distance and (twisted square steel, square steel, round steel, flat steel, etc.) for cross-arranged and welded into the middle of a square lattice with an iron and steel products, steel grid Banzhu use to do the ditch cover, steel platform plate, steel ladder in the stepping board. Bar normally used through the twisted square steel. Commonly used carbon steel grating production, surface hot-dip galvanizing, can play a role in preventing oxidation. Can also be made of stainless steel. Grating with ventilation, lighting, heat, slip, explosion-proof properties.