Following the plans on your site, I decreased the angle to 3 degrees, used 5" pine tongue and groove stock, 1x2 & 1x3 firring strips at the corners and lengthened them 1" at the bottom to create legs. They are very sturdy and look great on the front porch and poolside.
Thanks for sharing the original plans!
Brian in Weatherford, TX
Built from Plan(s)