At the conferende at the Frontier Museum you showed a picture of a post WWII barn with a truss frame from a farm magazine. It looks suspiciously like my hay barn, with a lower level for cows, in Vermont, which I date to the early 1950's. Can you find the reference for me, - and perhaps where to find a copy of that magazine! - so that I can verify?
I had to catch a plane and couldn't wait around to ask you then.