Discover a new feature!
You already know for sure that node, line, and surface releases are used to define transfer conditions between objects.
For example, you can thus release members, surfaces, and solids from a line.
Furthermore, it is also possible without any problems that the releases have nonlinear properties, such as "Fixed if positive n," "Fixed if negative n," and so on.
More About RFEM 6:
http://www.dlubal.com/rfem
More Features of RFEM 6:
https://www.dlubal.com/en-US/support-and-learning/support/product-features?family=rfem-6
More About RSTAB 9:
http://www.dlubal.com/rstab
More Features in RSTAB 9:
https://www.dlubal.com/en-US/support-and-learning/support/product-features?family=rstab-9
Download the free trial versions and get to know RFEM 6 and RSTAB 9: