When I got to this last section of roofing I was baffled as to why the top was only 14" to the edge and the bottom was 20" to the edge. Up to this point, everything was square. I racked my brain trying to figure out what I screwed up and it was not until I pulled out the long tape that I figured it out.
The original building was only the north half of the old building pic. The south side was built at a later date. While I used the same foundation and some footer repairs, I assumed the length on the north side foundation was the same as the south.
Wrong answer. The south side foundation was 6" longer than the north. I guess back in 1901 they didn't much care about a chicken barn being square. I had to trim a piece
to custom fit and then cheat a bit on the corner metal to hide the fact it did not follow a straight line of roofing on that west end piece.