Habitat can roughly be divided into five clusters: its three largest face avenue Pierre Dupuy, while two smaller clusters give onto the St. Lawrence River. Construction began on the southern-most large cluster and proceeded north. The boxes were assembled independently of the elevator shafts up to the level of the first walkway on the fifth floor. On that level the boxes were connected to the walkways by post tension cables for rigidity. Some of the boxes on the third floor are supported by columns on the second floor plaza level.