Structure comprising hexagonal tubes and rhomboid inserts

A process for on-site fabrication of a structure comprising the steps of:

• establishing a minimum of two straight hollow open-ended regular hexagonal tubes wherein said tubes comprise equally-sized and shaped cross-sectional profiles;
• establishing a minimum of five rhomboid-shaped inserts comprising equally-sized and shaped regions chosen from a set of a rhomboid cone and a rhomboid prism;
• placing a first of said five rhomboid inserts into a first of said hexagonal tubes in a configuration such that:
• the longitudinal axis in said region of said first insert is parallel to the central axis of said first tube;
• at least one end of said first insert extends outside said first hexagonal tube, and
• two walls in said region of said first insert are adjacent to two of the interior walls of said first tube;
• placing a second of said two hexagonal tubes over said exposed end of said first insert in a configuration such that:
• the central axis of said second tube is parallel to the longitudinal axis in said region of said first insert and parallel to the central axis of said first hexagonal tube;
• and
• two walls in said region of said first insert are adjacent to two of the interior walls of said second tube;
• placing a second and third of said rhomboid inserts into said first hexagonal tube in a configuration such that:
• the central axis of said first tube and the longitudinal axes in said regions of said second and third inserts are parallel;
• two walls in said region of said second insert are adjacent to two of the interior walls of said first tube;
• two walls in said region of said third insert are adjacent to two of the interior walls of said first tube;
• and
• the longitudinal axes in said regions of said first insert, said second insert, and said third insert are not collinear;
• placing a fourth and fifth of said rhomboid inserts into said second hexagonal tube in a configuration such that:
• the central axis of said second tube and the longitudinal axes in said regions of said fourth and fifth inserts are parallel;
• two walls in said region of said fourth insert are adjacent to two of the interior walls of said second tube;
• two walls in said region of said fifth insert are adjacent to two of the interior walls of said first tube;
• and
• the longitudinal axes in said regions of said third insert, said fourth insert, and said fifth insert are not collinear.

A kit containing a minimum of two hollow hexagonal prisms and a minimum of five rhomboid inserts suitable for use in the fabrication of a structure that can be assembled on-site, wherein:

• the prisms have central axes that are straight lines;
• the ratio of outside perimeter to wall thickness in at least one cross section perpendicular to the central axis of each prism is greater than 27.7 to 1;
• each of said five inserts comprises a region having an exterior shape from the a set of a 60/120 degree rhomboid prism and a 60/120 degree rhomboid-cone;
• each of said five inserts has at least one section whose exterior shape and size is identical to that of the other of said inserts;
• the perimeter of said sections of the inserts when viewed perpendicular to the longitudinal axes of the inserts is no greater than:
• 2(6s)/3−8(t)/(3√{square root over (3)})
• where:
• 6s is the perimeter of the exterior hexagon of the hexagonal prism;
• and
• t is the thickness of the walls of the hexagonal prism.