The Large span roll forming machine replaces perfectly the traditional frame architecture. The machine makes PPGI into the arch groove via the rollers. The arch groove will be connected by the sewing machine one by one together. Finally to finish the building. This kind of building has many advantages, such as fast construction speed, low cost, long service life, large span, beautiful shape, etc., and it’s widely used in various fields.The width of the equipment into the board is 600mm, the effective width is 305mm, the proper span is 4m-26m, and the usage rate is 51%.