wow....that's a neat "artifact"!
My dad was influenced by the dome thing, so we built one to live in back in 1971 (I was 10). google earth shows it's still there. We built it of 2x4s, with hubs made of "FHA" straps (1.5" x 1/8" x 18"), two long 1/4" bolts holding each 2x4 between two staps, and a 1/2" bolt at the center, with a piece of 1/2" EMT as a spacer.
Not much to it, I'm surprised it's still standing
