Compared to the RF-STAGES (RFEM 5) add-on module, various new features have been added to the Construction Stages Analysis (CSA) add-on for RFEM 6.
More about RFEM 6:
https://www.dlubal.com/en-US/products/rfem-6/what-is-rfem
New features in RFEM 6:
https://www.dlubal.com/en-US/products/rfem-6/new-features
Download the free trial versions and get to know the new RFEM 6: