According to the welding mode, it can be divided into pressure welding type, phase-embedded type, through-lock type and through-welding type. According to the shape of the side surface of the load flat steel, it can be divided into plane type, serrated type and "I" type. According to its use, it can be divided into general purpose steel grating and special purpose steel grating, such as trench cover plate, pedal plate and so on. Steel grating are divided into stainless steel grating and carbon steel grating according to the material.
Hot-dip galvanizing is more beautiful, has stronger adhesion, and has been tested by salt spray for a longer time. However, the conventional galvanizing process is cold plating.
Galvanized steel grating include hot-dip galvanized steel grating and cold-dip galvanized steel grating, which belong to the surface treatment method of steel grilles. Although the price of cold-dip galvanized steel is cheap, it is easy to rust, so people usually choose hot-dip galvanized steel grilles, but generally people can not see from the color of the surface.