The Butted Purlin System requires no sleeves at the joint between the purlins and is the simplest form of purlin construction.
Utilising, in the main, single span purlins, this system is employed principally on agricultural buildings where design criteria, particularly with regard to deflection, are less onerous. In other classes of building when this form of construction cannot be avoided, appropriate consideration should be given to the aspect at the design stage.
Butted Joint Arrangement
This system can occaisionally involve notched end connections to the purlins due to height restrictions imposed by the Architect. Non-standard cleats are therefore required. Hi-Span are capable of incorporating notched ends to both Z sections and C-Channels on receipt of details.