You can build an octahedron (eight triangular faces, twelve edges and six corners joining four edges each) out of twelve identical elements. The cord gives the strut an orientation, a back and front. The knotted end points in clockwise direction when viewed from the front.
|Single toolkit element|
Tendons go along the front of the strut, which means the 'outside' of the finished structure.
|The first connection|
|Continuing the pattern|
The knots point towards the end of the strut, not the center.
|Four struts form one 'corner'|
|The next vital connection|
When viewed from the front, the two struts connecting to the tendon of a toolkit element, arrive from opposing sides.
|The pattern for the second stage|
|Two struts of the second level|
|Three struts of the second level|
|Eight struts of the octahedron connected|
|Corner with second level turned around next to top corner|
|First connection of the top corner|
|Second connection of the top corner|
|Three connection of the top corner|
|Model with four missing connections|
|Three missing connections|
|Two missing connections|
|One step away from finishing|
|Tensegrity octahedron balancing on a corner|
Don't take the rules for the build as eternal truth, for other models other rules (although similar) apply. There's more than one way of building any tensegrity structure, only experimentation can improve any construction method.
The Affordable Tensegrity Toolkit just has hatched and needs now good documentation. Please contact me via this blog if you're interested in more details, or have specific requests or comments.