Question:
What is the meaning of "Common Surfaces" in RF‑PUNCH Pro? Do I have to set anything here?
Answer:
The "common surfaces" (Column I in Window 1.5) have an informative character.
In theory, you can select or deselect the surfaces to be considered in the punching shear design, and thus shorten the critical perimeter (see the video).
It is usually not necessary to make any changes here.