Mesh grid, also known as steel grating, is made of flat steel cross-arranged according to a certain spacing and cross bars (twisted square steel, square steel, round steel, flat steel, etc.), and welded into a square shape in the middle. A kind of steel product of lattice, steel grating is mainly used to make ditch cover plate, steel structure platform plate, steel ladder step plate, etc. The cross bar is generally made of twisted square steel. The steel grating is generally made of carbon steel, and the surface is hot-dip galvanized, which can prevent oxidation. Can also be made of stainless steel. Steel grating has ventilation, lighting, heat dissipation, anti-skid, explosion-proof and other properties.