Ah, I figured it was measuring front to back, not center to center. I'd say they're both valid interpretations.

Most doors and fences are, in fact, less than 7 inches thick. You probably couldn't get into a vault, but simple B&E would be trivial.

This is great. I've been working on a few projects and almost sidelining the worldbuilding a tad. I've been meaning to flesh out a few more things and get some inspiration for expansion. Looking forward to working on these! Though I wish it was posted just a bit before the month began ;)