Hi Lloyd,
Before I continue investigating this I have a question for you. Is this a Revit API related question? If the answer is Yes, can you please explain a bit more what approach have you tried so far from the API and if you can share some code to investigate further.
Now If the answer is No read below.
Revit API forum is for API (Application Programming Interface) questions.
For non-API questions, please choose other forums that is more appropriate. For example,
But I can tell you I also found a post that might give you some idea about what you are trying to do.
https://forums.autodesk.com/t5/revit-architecture/curved-ceiling/m-p/5540418#M89011
Installation and licensing:
http://forums.autodesk.com/t5/installation-licensing/bd-p/24
Revit Architecture (including common platform product usage questions):
http://forums.autodesk.com/t5/revit-architecture/bd-p/133
Revit Structure:
http://forums.autodesk.com/t5/revit-structure/bd-p/153
Revit MEP:
http://forums.autodesk.com/t5/revit-mep/bd-p/188
Cheers,