Hi D.L.,

I would turn to Ken H. for clarification on the possible history and etymology of the term "dragon beam," as I believe it was the current author of your referenced link Miles Lewis that described and used the term "dragon beam" when presenting the, "...1663 Richards: a full-length diagonal beam, receiving the base of the hip rafter..." is not necessarily what terminology that was being used in 1663 to describe this member. This term's original orgin would still seem to be a mystery to when it was first coined and from which root language or purpose?