I wanted to ask you a question. I was performing a structural analysis for a roof steel structure using RFEM, and when I compared it with a model in SAP software, I noticed an increase in the straining actions. From my engineering point of view, it’s about 5%, which I can consider an acceptable ratio. However, I wanted to know whether RFEM considers anything in the background of the software that could lead to this increase, or if it’s possible that I have an issue in my model.
Hi Ahmed,
In this case, it’s unfortunately not possible to give a general answer.
The question is very broad and depends on many different factors, so there’s no single, simple solution that would apply to all situations.
To get a better understanding of how such cases can be handled, you can take a look at our verification examples. They show practical applications and validated workflows using our software:
Verification examples:
https://www.dlubal.com/en/downloads-and-information/examples-and-tutorials/verification-examples/fpversion-16?f=_
If you can provide more details about your specific model or use case, we’ll be happy to take a closer look and help you further 
Best regards
Stefan Hoffmann