checkered steel plates are steel plates with rhombic shapes on the surface because of the rhombic shapes, the surface of the plates are rough,which can be used as floor board, factory stair boards, deck board and car boards, etc. checkered steel plates are measured and represented by plate thickness, and thickness varies from 2.5mm to 8mm. checkered steel plates are made of #1-#3 common carbon steels,the chemical composition applies to gb700 carbon construction steel certificate