Thanks for the question Phillip.. I have ran into this problem in work and have been asked by fellow students the very same question.
There are two ways to go about this. The first is to create a parametric masked region in plan view and the second is to model the actual frame.
Topics covered:
- Editing a door family
- Creating Parametric Masking Region (Symbolic)
- Loading Door back into project
- Editing Object Style of Door (Line Weight, etc...)
Stay tuned for the second option...