Did you ever receive the error message "Can't cut joined element" when you try to cut or join geometry as shown in the screencast? The reason is a limitation of lengths in Revit.
There is no workaround and solution yet. I got the following answer from Autodesk support:
"Revit's geometry modeler cannot deal with distances that small as features of a model. The project's units are mm, so .01mm = 0.0004 . ″. Revit considers the floors completely overlapping with that offset.
For the customer, they will have to redesign the elements - for example the two overlapping floors could either be one floor or taper to more than 1mm."
I wish to be able to join and cut forms and void however I like. There is a huge need for that, especially in infrastructure modelling.
Revit - Join and Cut not possible.rvt
