Hi Will, Yes we met when you kindly came over to the Museum as part of Frame 02 and demonstrated with Rudy Christian a couple of versions of Square Rule. In this thread that I am following from a distance it is intriguing to see how assumptions based on my local experience in Sussex, are not applicable in different circumstances. In the latest instance there is no need to cut the purlins to bay lengths, when long 2 bay length timbers are easily available and you can simply house them into the top of the principal rafters. The "new" name for butt purlins is tenoned purlins. They are found either in line or staggered from bay to bay, and the common rafters are either morticed into the purlins or pass over the top of the purlin. So 4 major variations available, with 2 typically found.These are tenoned purlins, in line, with rafters passing over the top and tenoned purlins, staggered, with tenoned rafters. Anyway all fascinating stuff to hear about CG framing.
