Large span forming machine is to roll and press the colored steel sheet to be grooved shape, then to be arched shape with grooved section, finally to be sewed together by sewing machine.

This kind of finished sheet will be used for lightweight steel roofing construction, The structure characteristics: rapid construction, low construction cost, low requirements of enviromental conditions, non-pollution, simple and lightness, high strenth. The seismic performance is good. Proffessionla line standardization of production. we can ensure the quality, modern design, elegant and practical.