RFEM and RSTAB provide the following options to open the RF-/STEEL EC3 add-on module.
Menu
To start the program, select Add-on Modules → Steel Structures → RF-/STEEL EC3 in the RFEM or RSTAB menu.
Navigator
To start RF-/STEEL EC3 in the Data navigator, select Add-on Modules → RF-/STEEL EC3.
Panel
If any results from RF-/STEEL EC3 are already available in the model, you can open the design module in the panel:
Set the relevant design case in the load case list of the menu bar. Click the [Show Results] button to display the design criterion graphically on the members.
When the results display is activated, the panel appears showing the [RF-/STEEL EC3] button which you can use to open the add-on module.