A very cool design! Is the bench free standing, resting only on the front curve, or are there some hidden supports behind? I see it is assembled in 3 repeated arcs.

Hi David, thanks for taking a close look and the kind words! My initial reaction was to say that the bench is free standing, but I'm not 100% sure (and I no longer have access to this building). I suspect there may be a few supports. It's very observant of you to see 2 breaks in the horizontal bar pattern that led to the 3 arcs, I hadn't noticed this when I originally made this writeup :) . I will update this post with pictures if I ever see this bench again!