The Octahedron, Tetrahedron
and Cube (Hexahedron) combined in the OTC pyramid truss unit
We begin with the Tetrahedron.
It is the 'lowest common denominator' of structural systems.
As part of our design, mid-edges have a Connector Hub for adding the dual-opposite
Dual Tetrahedrons form the vertices of the Cube and basis for the design
of our "Tetra-Dome":
Tetrahedron mid-edge points also define the vertices of the Octahedron:
The Tetra Duals and the Octa:
Tetrahedron points are joined to make the Cube:
The Tetra Duals get a translucent covering: