Hi!
There's a number of ways to do this (like with most things in Revit). One way is to create a ref plane that is the center of your door hardware, and constrain the center of your hardware to the ref plane (you might want to create a detail item family to nest to the door family to represent your hardware, for easier manipulation, swapping, etc. and also so you can easily align and lock the ref plane you created to the center ref plane in the detail item family).
Then if you already have a ref plane at the end of the door panel, create an aligned dimension between it and the HW center ref plane, then label this dimension to a new length parameter and lock it (once you load the door swing fam to your door fam, you can patch the relevant param in your door fam so that the HW is in the expected position (if the HW is always a fixed distance from panel edge, you could just lock the dim, but making it parametric might be helpful in future).
See below an example of a detail item family representing a solid panel with a lite (inset glass), that would be nested into a door family:
Hope this helps. Let me know if not clear!
Rene Pellicer Garcia
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.