Invisible Boundaries

An open room contains places even when it contains few walls. A table establishes an area for sitting and the space needed to pull out a chair. A group of seats gives conversation a position. The routes between them determine whether those activities can continue while someone crosses the room.

Furniture, light and changes of surface can make these relationships legible. A pendant can identify a table within a large volume; a rug can gather seats into a recognisable group. Their effectiveness depends on the whole arrangement, including the movements that take place around it. A boundary intended to organise a view may offer little sound separation, so the purpose should be clear.

Hall's work on interpersonal space and research on how people recognise changes of activity give designers ways to think about these divisions. In practice, the most revealing drawing may show several uses happening together. The chair is pulled out, the cupboard open and the route to the garden occupied. Overlap becomes visible, allowing the layout to provide enough room for each action. The result is an open plan with places people can understand and use.