With his "Hangar" of 1954, Wachsmann proposed a plane single-layer lattice consisting of tetrahedrons and complementary semioctahedrons (pyramids with equal edges) as a two-lined grid in the a-position. This is representative for a series of other space frame constructions having different figurations or different position, which are all organized on an intracubic crystalline spatial grid.

WACHSMANN IN THE METAEDER