The "mega-zome" materials you saw at G4G-13 (white metal struts with machined aluminum connectors) is strong enough to climb on, but is not commercially available. It was produced with only the "blue" directions of Zometool (i.e., the fifteen 2-fold axis directions of the icosahedral symmetry group). George http://georgehart.com On 5/14/2018 9:30 AM, James Propp wrote:
Is there a Zome-system kit for building large structures strong enough to climb on?
Some of the large structures at G4G13 seemed Zome-ish (but not strong enough to stand up to kids climbing on them).
Jim Propp
On Monday, May 14, 2018, George Hart <george@georgehart.com> wrote:
The zonohedron based on the ten directions of the dodecahedron's long diagonals is the rhombic enneacontahedron.
Note that Zometool is the ideal material for making models of these structures because the ball design is constrained to maintain parallelism in space. Use just yellow for the rhombic dodecahedron or the rhombic enneacontahedron, just blue for the truncated icosidodecahedron, and just red for the rhombic triacontahedron.
George http://georgehart.com
On 5/14/2018 7:44 AM, Veit Elser wrote:
On May 13, 2018, at 12:43 PM, Scott Kim <scott@scottkim.com> wrote:
I haven't tried pushing this higher…I wonder what zonohedron one would get starting from 15 vectors that point out to half the vertices of a dodecahedron? That seems like the next thing to try. Does anyone know?
The dodecahedron has 20 vertices. Are you thinking about the 15 two-fold axes of the icosahedron/dodecahedron, i.e. vectors that point to the edge mid-points? If so, then the answer is:
https://en.wikipedia.org/wiki/Truncated_icosidodecahedron
-Veit
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