Fastener Loads

Fastener failure by fatigue can occur when fasteners embedded in timber or hot rolled steel, are subject to frequent bending action by repeated thermal expansion forces. This is unlikely to happen to cold rolled steel purlins up to 2.5 mm in thickness as the thinner depth of connection of the screw into the purlin allows it to rotate, rather than bend.



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

The content is this clause has been revised as part of the overall revsion of Structure.

Draft Clause: