Octahedron Beam

http://www.3ders.org/articles/20121201-ultralight-3d-printed-beams-could-bear-heavy-loads.html

Modeled after the article.
Done with blender using the skinmodifier.

I hope I will be able to use it on all skales instead of normal rectangular beam.

Next: I will try to add a version which is repeatable with connectors on the ends.