Stacking, (or in its even cruder form, piling) is one of the simplest and perhaps most primitive procedures in the creation of built form. Although structurally simplistic, it expresses a degree of material immediacy through its lack of complicating technological refinement. The stickered stack of lumber, the dry-laid stone wall, the banded pallet of bricks, the earthen mound; all appeal to our eye as manifestations of a simple additive operation.