This video shows how to import internal forces in RSECTION. RSECTION offers the possibility - in addition to the manual definition of internal forces - to import internal forces from RSTAB or RFEM.
In RSECTION you must first create a load case before you can import internal forces. Furthermore, you must have saved the relevant RSTAB or RFEM file with results. In the 'Import internal forces' dialog you can then select the source model and location as well as the load case or load combination from which to import the internal forces.