11.  The cantilevered floors, horizontal planes, create semi-private zones within.

12.  The concept of using a liquid to create or find a horizontal plane is not new.

13.  The fan is housed in a hood, so it opens on a horizontal plane rather than a vertical plane as on a fan installed in a wall.

14.  This can be moved in any direction in a horizontal plane.

15.  We are accustomed to looking down on a game, not on a horizontal plane.