This is a Pergola that the company I work for had built a few years ago. It is one huge bentwood lamination..3/4" pine starting off @ 22' long, six layers, 4 separate arches, two different radiuses. It is probably one of the greatest things the company has designed, as far as wood projects go. I would like to say that I had a hand in the building, but all I did was drive to VA to get the boards. It was built by a company called Dreambuilders, he had to create the bending form in his driveway due to the size. It blew folks away, we had so many people trip while looking up, and not paying attention to where they were walking.
Dave
Dave