Sector steel grating fan-shaped steel grating is a classification of special-shaped steel grating. It is also called annular grating and irregular grating. Because of its beautiful appearance, it is widely used. Good load-bearing, does not need too much material support, bears the same gravity, is not easy to deform compared to other specifications of steel grating; corrosion resistance, impact resistance, long service life, so it is often used in hydropower plants, boiler plants, Sewage treatment plants, shipbuilding and other humid environments.