To cantilever - to support by a long projecting beam that is anchored only at one end (bridges are cantilevered (?)). Per the online OED.
Frank Lloyd Wright's Fallingwater is constructed with three kinds of cantilever (the beam anchored at one end) -
1. "extension from an anchorage (as in the iron arm suspending a kettle" over the fire)
2. "counterbalancing (like simple scales)"
3. "loaded extension that permits limited anchorage" (the way a Russian dancer squats and extends his legs slightly above the floor)
Edgar Kaufmann, Jr., Fallingwater: A Frank Lloyd Wright Country House (New York: Abbeville Press, 1986).
