FRP molded grating is a kind of structural plates which uses high-strength fiberglass roving as reinforcing material, thermosetting resin as matrix and then is cast and formed on a special metal mold. It provides properties such as : light in weight, high strength, corrosion resistance, fire resistance, solid and anti-skid. It is widely used in oil industry, power engineering, sewage treatment, ocean survey as working floor, stair tread, trench cover and the like. It is an ideal loading frame on corrosion circumstances.