Patent ID: 7665250

Claim:
A structure comprising a first module having at least a first side, a second side, and a third side, the first module comprising a first corner block, a second corner block, and a third corner block, each corner block comprising an upper portion, and a lower portion, such that the cross sectional area of the upper portion is substantially greater than the cross sectional area of the lower portion; a first corner block sloped bearing surface, and a second corner block sloped bearing surface; a plurality of corner block supports, such that each corner block support accepts the lower portion of at least one of the corner blocks; and a first key block, a second key block, and a third key block, each key block comprising a first key block sloped bearing face, and a second key block sloped bearing face, such that the first side is formed by the first key block partially overlapping and interlocking with a portion of the first corner block and the second corner block, such that the first key block first key block sloped bearing face mates with the first corner block first corner block sloped bearing surface; and the first key block second key block sloped bearing face mates with the second corner block second corner block sloped bearing surface and the second side is formed by the second key block partially overlapping and interlocking with a portion of the second corner block and the third corner block such that the second key block first key block sloped bearing face mates with the second corner block first corner block sloped bearing surface; and the second key block second key block sloped bearing face mates with the third corner block second corner block sloped bearing surface.