As with any precedent study, the ultimate goal is increased knowledge about both the individual project as well as the mechanics behind its specific program and construction. While at first blush Moshe Safdi's Habitat 67 appears almost completely random, after careful study the precise grid governing the entire complex emerges. Each unit follows this grid, with two or three units being stacked to form an individual dwelling. These dwellings are then stacked and rotated, combining to form a massive mound of units. A series of circulation corridors then forms the spine of the building.