Secondary members used in a PEB includes purlins, side runners, eave struts, fascia channels, door posts window posts, rafter stays, column stays, base angles, and other miscellaneous structural parts. These purlins and channels sections give an excellent strength-to-weight ratio, thus giving tremendous cost saving. They are manufactured from galvanized coil conforming to ASTM – A 653M, Grade M having yield strength of 345 MPA and from HR coil ASTM A 570 M Grade B having