It would not be possible for a CG roof to have common rafters since the CG's are below the elevation required to accept the feet of common rafters.
Regards
Ken Hume
Not so fast Ken.
I know just what you mean. And this is why I posed this to Tim... that a CG needs a purlin roof just by default.
But I just this minute received a reply via email from Jan Lewandoski about CGs and the Vermont Barn Census. (I'm waiting to hear back if he'll allow me to post it here).
He says some CG barns he has seen in Vermont have common rafter roofs... he says it is rare, but they're out there. Suposedly, the rafter feet bear on big flying plates/purlins or the girts themselves.
