C Purlin Steel Forming Machine

In architecture, structural engineering or building, a purlin (or 
historically purline, purloyne, purling, perling) is any longitudinal, horizontal, 
structural member in a roof except a type of framing with what is called a 
crown plate. (Quoted from wiki), as to the C purline, the shape is like the 
character C with lips and something for easy installation with the punching 
holes. The steel purlins are in turn supported by rafters or walls. Metal C 
Purlins are light in weight and perfect for simple span construction. 
C Purlin - Cee or C purlins are shaped like a squared-off letter C. They are 
often used for structural support in walls and as floor joists in addition to 
roofs. 
Profile and sizes range: 
Metal Cee Purlins are available in a wide variety of sizes and lengths. See 

graph below for sizes of galvanized metal purlins. 

The following is the application of c purlin steel.

Basic parameters of C purlin steel forming machine for your reference: