My parents bought a lake house in Ohio a couple of decades ago. When we gutted the interior, we found that the entire house had been framed with 4' lengths of 2x4 with none of the "studs" at exactly right angles. Most fucked up thing I've ever seen (except maybe the bathrooms in Atlanta where the floor was just non-PT plywood laid directly on the ground) but somehow the builder had ended up with the walls perfectly level and plumb.