Understanding Loads

The performance of profiled metal cladding under wind, snow and point loads depends on its ability to resist the tension (pulling), compression (squashing), and shear (sliding) forces that it is likely to be subjected to during the lifetime of the building.



Profiled Steel — Flanges and Webs

A structural steel member typically comprises of sections named webs and flanges. In a roofing profile the sides of the rib act as a web, and the pan and top of the rib acts as a flange


Profiled metal cladding acts as a beam, which derives its strength from the ability of its flanges (pan and the crest), separated by the web to resist tensile and compressive forces. This strength can only be maintained while those parts in compression are restrained from buckling.

When a beam is subjected to bending, one flange will be under compression and the other under tension.

Draft Clause: