@laura.johanssonPN37Y wrote:
I was afraid this would be the case, so cumbersome.
So how do I combine all 3, do I keep layering the railings until I have the complete set, or will Revit delete railing and only allow 1, like it does with other things?
Revit will not do anything to make the railings correct. You need to make it work to comply with codes, using multiple types of railings, and using them where it applies.
For how to model multiple types of railings in the same stair, see previous post by @ToanDN.
Below is an example of a stair, in which at least 4 types of railings are used:
(One wall is hiddden in this view for clarity).

Alfredo Medina _________________________________________________________________ ______
Licensed Architect (Florida) | Freelance Instructor | Profile on Linkedin