yes, my mistake. Scribe on that first one! my mistake...
OK, I'm confused. You have visited two barns recently, right? The CG barn you looked at "on the way down"... is the one in Bucksport? And that one has common rafters? And thats a true CG, right: the ties rest directly on the posts...the rafters atop the ties, right?
The English barn (w/ the cobwebs) you think could have been a CG if the plate was lower, right? But plate height really isn't the determinant. As you know, the plates have to be interrupted. So it's really whether the tie sits on the post directly... this makes a "bent-unit": post, tie and rafter at the same plumb line.
So for the sake of everyone reading, that's what makes a CG. It really is that simple: the post, tie and rafter are all vertically aligned.
Is that what you see in the "English barn?" Neat that you've foud a purlin roof, anyway... I know they haven't been very common up that way.
