In some cases the EC3 checks in RFEM's add-on module RF-STEEL EC3 give an error message "non designable". This can be due to a moment or torsion on a non symmetric profile:


As you can see in the screenshot above their is a design issue with a cold formed profile because of torsion.

You can change the max. portion limit in the details of RF-STEEL EC3:


If you change it you should be sure that the torsion as okay according to this limit.

Better solution is to use our new module RF-STEEL Warping:

This new add-on has a 7th degree of freedom and can check also these previous non designable cases.

Hereby a link to a webinar related to this specific topic:

You can download the latest RFEM release here and test this feature:

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