Distributed Loads on Translucent Sheeting

The spanning capacity of profiled roof lights depends on the profile shape, material thickness and composition, the number of fasteners per square metre, and the washer type and size.   

Pull-though of the fastener is the most common failure mode of profiled translucent sheeting, so it should always be installed with a load spreading washer unless otherwise specified by the manufacturer.

Additional support can be obtained from adjacent metal cladding by using mid-span supports, alternatively, the thickness of the roof lights may be increased.

Profiled translucent sheeting must be designed to be capable of withstanding design wind loads, using the manufacturer’s literature.



Revision Category: 
2 - Editing and rearrangement
Revision Detail: 

Clause revised and renamed as part of the overall revision of COP Clause 11. Natural Light.

Draft Clause: