Traditional Timberframe has a habit of being made from pretty straight pieces of wood. I don't do a lot of straights. When bent elbows and brackets were needed, they were taken from obliging trees. I go a little deeper into the resource and extract a more extreme bend from the plank. The project shown is made up of bent Red Oak, though I also work in most of the other temperate hardwoods as well. Its function is meant to be undulating flooring, about 1 1/2 acres of it, under a glass atrium in Seoul. Yesterday, the Tacoma News Tribune did an article on the prototype, and you are welcome to review it at http://www.thenewstribune.com/voelpel/story/702816.html .