Truncated Icosahedron (internally supported)
Truncated icosahedron e
TypeReinforcement structure
Rods 210+150 × Geomag rod icon
Spheres 80 × Geomag ball icon
Author Amafirlian 18:07, 25 August 2007 (UTC)

This support structure is amazingly close (TODO: how close). It consists of five intersecting tetrahedra, connected to the spheres in the truncated icosahedron with valency 6 (there are twenty of them). The length of the tetrahedral edges is 5 rods.

The edges of the tetrahedra should be 143.8035 mm, and they are 146.84 mm actually. That is 2.11% too long, but the excess is easily absorbed by the hexagons.

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