The panel is made of 6-thick steel plate, the big and small ribs are made of 8 # channel steel, the purlin is made of 8 # channel steel, the panels are made of Φ 30 tapered split bolts, the ribs are fully welded, the panel is welded on both sides with the big ribs, and the panel is spot welded with the small ribs. When designing the formwork, the formwork is prepared according to the size of the design drawing. See "Schematic Diagram of Standard Large Steel Formwork" for the standard formwork.