C section and Z section purlin products are thinner, lighter and easier to produce and typically cost less than their built up member. C section and Z section purlin products offers versatility in building because of its light weight and ease of handling and use. This purlin sections give in excellent strength to weight ratio, giving tremendous cost saving. They are manufactured from galvanized coil confirming to ASTM A 635 M, grade M having yield strength of 200 to 350 MPa and from HR coil ASTM A 570 M, grade B having yield strength of 200 to 350 MPa.