A, variety specification size: design production according to customer's request. Second, material origin: all in Shanghai baoshan steel of high quality cold rolled A3 steel plate, national standard models for SS400 steel, the material surface, demanding. Three, pillar: use Shanghai baoshan steel of high quality cold rolling SS400 steel pipe cold drawing forming, square tube cross section size is 70 * 40 (length * width), material thickness 2.5 mm. Single force of 600 kg, to allow maximum deflection to 1/1000 of the height, safety factor of 1.5. Four, layer board: use high-quality rolling SS400 Shanghai baoshan steel material thickness 0.8 mm, the bottom of the weld