The C Purlin Roll Forming Machine uses a series of rollers to gradually shape the metal strip or coil into the desired C-shaped profile of the purlin. The machine typically includes a decoiler to hold the coil of metal, a leveling system to straighten the metal strip, a roll former to shape the metal into the C-shaped profile, and a cutting system to cut the finished product to the desired length.

C purlin roll forming machines can be customized to produce purlins of various sizes and thicknesses, depending on the specific requirements of the construction project. The machines can produce C purlins with different dimensions, such as height, width, and lip size, to meet the specific design needs of the building.