Question:
A cross-section rotates suddenly within a member or a continuous member.
What is the reason and how can I fix it?
Answer:
It is caused by the automatic orientation of the local axes related to the global axis system. 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 description of the member rotation angle in RFEM and RSTAB by clicking the links below.