Steel grating is also called steel grating, hot-dip galvanized steel grating and hot-dip galvanized platform planking. Flat steel is used to cross and arrange cross bars (twisted square steel, square steel, round steel, flat steel, etc.) at a certain interval and welded into a steel product with a square lattice in the middle. The steel grating is mainly used to make water trench cover plate, steel platform plate, steel ladder step plate, etc. The crossbar is generally made of twisted square steel. Steel gratings are generally made of carbon steel, the surface after special hot-dip galvanizing treatment, its chemical and physical properties are stable, not susceptible to air and microbial corrosion oxidation, the use of time up to 40-60 years.