A tornado trellis
From Daizen News, July 2013
The hot season has arrived: finally, we need shade from the sun. A square trellis may not work in a round space, so we came up with a new design.
The horizontal plate sits on the receiving member and comes back to the original plate: a self-supporting structure.
In the final product, we end up making a simple square base frame rather than a star structure. The horizontal tornado plate on top stays as solid as we expected. The wood in this frame is Western Red Cedar, finished with natural oil.