Brick Built Structures 
Where purlins are to be supported directly on brick walls, particular care must be taken with regard to positioning and alignment of the purlins prior to being built-in. The use of false rafters, fitted with standard purlin cleats, is of considerable assistance in this respect. Sleeved joints should be used where purlins are continuous over intermediate walls. When single span purlins cannot be avoided, please consult our Technical Department. 
Provision should be made at all supports to restrain purlins against wind uplift by the use of rod or flat anchor straps. Particular attention should be given to gable verges, where 'local zone' values for wind uplift loading should be used for anchor strap design.

Service Clips 
Services are often hung from the secondary steelwork in a variety of ways. Hi-Span would recommend web fixings or wrap around fixings for loads in excess of 15kg for our sections ranging up to 1.8mm thk, and in excess of 30kg for our heavier gauge range. When lighter loads require support various forms of clip are available, as shown below. Confirmation of the purlin capacity in a point load condition is always required.

Hi-Span recommend contacting the following manufacturers for further advice on clip installation and loading capabilities.

Please note clip load capacities published by the manufacturers may exceed the load capabilities of the section. Please contact our Technical Department for further information.