The steel surface with a pattern called checkered, its pattern into lentil-shaped, diamond, round bean-shaped, oblate shape mixed, the market in order to form the most common lentils. There Origin: Laiwu Steel, Rizhao, Benxi Iron and Steel, Shougang, Nanjing Steel, Meishan Steel, Anshan Iron and Steel, TISCO, etc. Checkered appearance, can slip, strengthen performance, saving steel and many other advantages. In transportation, construction, decoration, floor surrounding equipment, machinery, shipbuilding and other fields have a wide range of applications. Generally, parties to checkered mechanical properties, mechanical performance requirements, so checkered pattern quality mainly as flowering rate, the pattern height, elevation pattern. Currently on the market common thickness ranging from two kinds of width are common 1250,1500mm from 2.0-8mm. Tread plate according to the national standard GB / T 3277 regulations, the pattern height should be greater than or equal to 20% of the thickness of the substrate. Checkered according to the material (aluminum, stainless steel, ordinary steel, etc.) is different, different patterns shapes, different theoretical weight per square meter.