The cross-section of a member suddenly twists about its own axis along a member in my RFEM 6 or RSTAB 9 model. Why does this happen and how can it be fixed?

Question

Accepted Answer

This is caused by the automatic orientation of the local axes related to the global axis system in RFEM 6 and RSTAB 9. In most cases, it is sufficient to specify the member rotation using an angle or a help node. However, if the member inclination is reversed, it is necessary to split it and then adjust it by means of the member rotation.You can find a detailed explanation of how member rotation angles work in RFEM 6 and RSTAB 9 by clicking the link below:

Cross-Section Twisting About Its Own Axis in RFEM 6 or RSTAB 9

The cross-section of a member suddenly twists about its own axis along a member in my RFEM 6 or RSTAB 9 model. Why does this happen and how can it be fixed?