The Ribbon House IV approaches the planar flow in a different way. Now the ribbon itself is habitable, fluid and inconclusive. Still using folds for its continuity, this posed a challenge.
The first one was to maintain the space habitable. For that the ribbon had to be able to be walked on and through.
Maintaining a start and an end the Ribbon House IV showed a couple of things:
1. The ribbon can be functional
2. The ribbon's folds, even the vertical, could become programmatic.