Framework structure

A structure comprising:

• a first plurality of tetrahedral elements each defining a base and an apex and formed of edge elements and corner connectors one each at each corner of the element base;
• first securing means for removably securing the corner connectors of the bases of said elements in a first array with said bases thereof defining a first common plane and the apices thereof projecting perpendicularly thereto to define a plurality of of tetrahedral projections narrowing away from said plane and a plurality of complementary first spaces therebetween widening away from said plane;
• a second plurality of tetrahedral elements each defining a base and an apex and formed of edge elements and corner connectors;
• second securing means for removably securing the elements of said second plurality in a second array with the bases thereof defining a second common plane and the apices thereof projecting perpendicularly to said second common plane to define a plurality of tetrahedral projections narrowing away from said second common plane and a plurality of complementary second spaces therebetween widening away from said second common plane, said second array being nested with said first array with the projections of said first array received in said spaces of the second array and the projections of said second array received in said spaces of the first array with the planes of the bases of said second array being substantially parallel to the plane of the bases of said first array;
• and
• third securing means for removably securing the connectors at the apices of the first array to the connectors of the bases of the second array, and the connectors at the basis of the first array to the connectors at the apices of the second array, the corner connectors at the apex of the elements being secured by said third securing means to corner connectors at a corner of the base of each of three elements nested therewith.