Composite steel grating is a new product of steel grating composed of steel grating with certain spanning ability and surface-sealed patterned steel plate or steel mesh. Composite steel grating can be composed of any type of steel grating and chemically grained steel plates of different thicknesses. It has good ventilation, lighting, heat dissipation and anti-skid properties, and is very convenient to install and disassemble. It is often used in stairs, so it is also called pedal.