Read here about tensegrity structures composed of three struts, part of a series of pages organized by strut count.

Overview

The 3 strut tensegrity prism is considered the simplest tensegrity structure.

3 Strut Tensegrity Image Gallery

Below, a small gallery of 3 strut images.
3_strut_tensegrity_1143.reference.jpg
A 3 strut tensegrity by Fuller, of historical interest. The filament is probably dacron. Stanford archive photo.
3_strut_tensegrity_1136.reference.jpg
3 strut tensegrity by Fuller, forming a triangle. May have been used to illustrate that even a "polygon" triangle is an ultra-flat tetrahedron. Stanford Archive photo.

3_strut_Fuller_Tensile-integrity_patent_3063521_clip_image026.jpg
3 strut Fuller Tensile-integrity patent number 3063521.
3_strut_Marcelo_Pars_tns006.jpg
3 strut tensegrities, in two tensile arrangements. Constructed, and photo, by Marcelo Pars.



A carbon nanotube 3 strut prism is proposed, see Buckminsterfullerene :
3_strut_prism_carbon_nanotubes_covalently_tensioned_by_Needham,_Wilson,_Yakobson.GIF
Three carbon nanotubes are covalently tensioned, or tethered, at their cap pentagons by polyethylene polymer chains, by Needham, Wilson, and Yakobson.



3 Strut Tower With Added Shade Element


3_strut_shade_structure_by_Armin_R._Kachel.jpg
3 strut shade structure by Armin R. Kachel

3 strut shade structure by Armin R. Kachel
Also, see the 3 strut prism with shadow that BenFrantzDale uploaded to Wikipedia.

3 Strut Prism Used as a Tripod


The 3 strut prism can be used as a tripod, supporting an object. WV is a veteran user of tensegrity structures for camping. He has deployed tensegrity hammock stands. Below, a 3 strut tensegrity stand he built supporting a Bushcooker LT II stove. Photographed by WV while camping at Laurel Fork Wilderness, August 2010.

untitled.jpg
3 strut tensegrity stand for Bushcooker LT II Laurel Fork Wilderness 8-2010 by WV


Multiplying The 3 Strut Prism


The 3 strut construction may be reiterated to construct larger tensegrities.

Images of 3xn tensegrities: the 3 strut construction repeatedly implemented


An image gallery of the 3 strut tensegrity repeatedly implemented to form larger tensegrity structures.

Below, 10 repeated 3 strut modules, by Fuller.

4_freq_tetra.Tensegrity_Model.reference.jpg
Fuller created this pyramid of 3 strut tensegrities, yielding a 3x10 strut tensegrity. Photo, Stanford archive.

Below, the Sixty Strut Tensegrity by Fuller, composed of a repeated three-strut module.

3x20_60_strut_tensegrity_sphere_by_Fuller_on_site.jpg
The 3 strut is repeated as the 20 faces of an icosahedral tensegrity. Photograph of Sixty Strut Tensegrity Sphere, University of Wisconsin, Madison.


A 3 strut tensegrity has been constructed from DNA strands by Seeman's team. Below, a stereoscopic image.

DNA_3_strut_tensegrity_by_Seeman_image006.jpg

In an alternate construction method, each structurally essential strut is repeatedly implemented. The new strut is redundant, structurally. Visually, the redundant struts articulate various forms as they apread out and away from one another. Pars experiments with this implementation; below two photos from his website.

3x17_strut_Marcelo_Pars_tns011a.jpg
3x17 strut tensegrity hanging. Construction and photo by Marcelo Pars.
3x17_strut_Marcelo_Pars_tns011b.jpg
3x17 strut tensegrity hanging. Construction and photo by Marcelo Pars.


History

OIoganson may have constructed a 3 strut tensegrity prism

This form may have been constructed by Karl Ioganson.

Videos

Tomaiwa manipulates a 3 strut tensegrity


Tomaiwa flexes and compresses the model while discussing it in Japanese. "割り箸3本のテンセグリティ"



Links:
Tomaiwa's channel, http://www.youtube.com/user/tomaiwa.
Tomaiwa made a similar video holding a 6 strut prism, see 6 struts.

Portal to Polyhedra
A series on polyhedra and associated tensegrities
  1. Platonic: Cube, Dodecahedron, Icosahedron, Octahedron, Tetrahedron
  2. Archimedan: Cuboctahedron, Jitterbug, Rhombic Dodecahedron, Stella Octangula, Tricontahedron
  3. Form: Prism, Torus
  4. Concepts: Naming
Access by no. of struts: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 21, 30, 60, 90, 270, 540; Procedures: 3, 30



Links and References


See also

A video of a 3 strut chime is posted at Musical Instruments.
3 strut tables are posted at Furniture
3 strut shade structures at Shade Structure

Portal to Polyhedra
A series on polyhedra and associated tensegrities
  1. Platonic: Cube, Dodecahedron, Icosahedron, Octahedron, Tetrahedron
  2. Archimedan: Cuboctahedron, Jitterbug, Rhombic Dodecahedron, Stella Octangula, Tricontahedron
  3. Form: Prism, Torus
  4. Concepts: Naming
Access by no. of struts: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 21, 30, 60, 90, 270, 540; Procedures: 3, 30