Add the beams to a model group, save model group, delete beams from project, change level, insert beams back in.
Welcome to the Autodesk community!
Sorry to hear that you are having issues.
Did the crash generate a CER?
Regards,
Viveka CD
Designated Specialist - AEC, AR/VR Research
Autodesk playlists| Find Recommended Hardware| System requirements for Revit products| Contact Autodesk Support| Autodesk Virtual Agent| Browse Revit Ideas| Revit Tips/Tricks| Revit Help| Revit Books