Isotruss 8

Patented structure which can replace a cylinder with better strength/weight ratio. This is 8 node structure. You can select from 4 combinations of pole locations.

You can find inscribed and outscribed cylinder in the code.

https://patents.google.com/patent/EP1358392B1/en
http://www.isotruss.com/
http://aircconline.com/ijci/V5N1/5116ijci21.pdf