The specifications of checkered steel plates are expressed in terms of basic thickness (not counting the thickness of the ribs), and there are 10 specifications of 2.5-8 mm. No. 1-3 is used for checkered steel plate. Class B ordinary carbon structural steel is rolled, and its chemical composition meets the requirements of GB700 "Technical Conditions for Ordinary Carbon Structural Steel". The height of the pattern plate is not less than 0.2 times the thickness of the base plate; The checkered steel plate shall be delivered according to actual weight or theoretical weight; Marking example: made of Q235-A, the size is 4*1000*4000mm. Round bean pattern steel plate, its mark is: round bean pattern steel plate Q235-A-4*1000*4000-GB/T 3277-91 Diamond pattern steel plate, its mark is: Diamond pattern steel plate B 3-4*1000*4000-GB 3277-82 The steel plate is delivered in the hot rolled state; The surface of the pattern steel plate shall not have bubbles, scars, cracks, folds and inclusions, and the steel plate shall not have delamination.