Allan Mackie published an article in the Canadian Log Builders periodical published many years ago when the school was going strong. It was concerning the building of large buildings using relatively small logs. The method involves purlins morticed into the principle rafters
of trusses. The top of the purlins are in the same plane as the top of the rafters. The Douglas Fir Building was inspired by this article. I beleive it may be the largest building built using this method. If anyone knows of any other similar building it would be of great interest to the forest dwellers. The truss design is , I believe, unique and uses twin chords, twin queen posts, a collar tie with no king post. It also sports twin porch rafters(4 in all) . The span is 60ft with 40 being clear.