Cold Formed Steel C U Profile Solar Panel Support for PV Plant Project C Purlins are made from quality galvanized steel or hot rolled black finish steel and are rollformed to length with holes punched to your specification.It is available in different sizes and material strengths to match the design specification of your project. As the main structure of the pv mounting system,the galvnized steel are made by good quality Q235B and Q345B.The performance of load-bearing,wind