Optimum performance of roof cladding under load depends on the continuity over several spans.

An adjacent continuous span assists the performance of profiled metal cladding, as continuity can reduce deflection up to 50%. In single spans the cladding is free to rotate at each support, but with continuity at a support the cladding is held down by an adjacent span; reducing the rotation and deflection.

The end span of profiled metal cladding should be no more than two-thirds of the intermediate span for optimum performance under both point load.

Clause Number:
Revision Category: 
3 - Substantial change to recommendation
Revision Detail: 

The content of this clause was revised and edited as part of the overall revision of Structure. The illustration for Continuity, was updated for clarity.

Draft Clause: