What is the checkered steel plate, also known as chequered steel plate, is the steel plate with rhombic or protruding edges on its surface. The steel plate is made of ordinary carbon steel 1-3 class B steel, with thickness of 2.5-8 mm, width of 600-1800 mm and length of 2000-12000 mm. The specification of pattern steel plate is expressed by basic thickness (excluding the thickness of rib), and there are 10 specifications of 2.5-8 mm. No. 1-3 is used for checkered plate, and the height of checkered plate shall not be less than 0.2 times of base plate thickness. The pattern can be a single diamond, lentil or round bean shape, or two or more patterns can be properly combined to form a composite pattern plate. The pattern mainly plays the role of antiskid and decoration. The results show that the combined pattern plate is superior to the single pattern plate in terms of anti slip ability, bending resistance, metal saving and appearance. Pattern steel plate is widely used in shipbuilding, boiler, automobile, tractor, train carriage and construction industry. Due to the sharp edge on the surface and anti-skid effect, the pattern steel plate can be used as floor, workshop escalator, work frame pedal, ship deck, car bottom plate, etc. The pattern steel plate is used for the pedal of workshop, large equipment or ship's walkway and stairs. It is the steel plate with diamond or lentil pattern on the surface.