The Heavy End Bay System is the most recent purlin sytem to be made available from Hi-Span. A minimum of five equal bays is required for the system to perform economically with the use of heavier end bay sections. Sleeves are required at every purlin/rafter connection, no double span purlins. The system offers a very economical solution to the user in the long span multi-bay buildings, because considerable savings can be made in using lighter inner bay purlins, with the added advantage of simple erection procedure.
Single Span Joint Arrangement
End bay purlins and the penultimate sleeves are manufactured from heavier gauge material as shown. Greater end bay moments are then accomodated by the larger section sizes, allowing lighter gauge sections to be designed for the inner bays.