2 Octa Pyramids, joined at 2 lower common connections and a top cross bar that makes a central Tetrahedron.
My Icosa - Dome -X1 garden covered with anti-bird/deer netting is in the background.
Here you can see the Tetra-Dome
X2+VBO greenhouse in the background.
The strutcture has large flat faces that can be covered with long sheets
of greenhouse film or poly tarp.
It needs a perimeter wall of RR ties, cement blocks, etc. or the Vertical
Base Option to give more walking area inside.
The first step was to build this Octa Pyramid using the Star Connectors
made from 1-3/8" steel conduit and 10 ft pvc tubes. More Star Connectors
and pvc struts were added to complete the basic Octa - Tetra truss
frame.
Top connection:
Octa-Tetra Part 1