||Finsbury Park - Door, Tate Britain - Rotating Art Piece, Vauxhall - Tube Barriers. The revolving door is attached to the door frame with a set of hinges, the screws are counter sunk so they can be flush with the surface. On one side of the door there is a push plate, while on the other side there is a handle. This indicates which side to push or pull the door. There is also a push plate at the bottom of the door, this lets you use your feet to open the door if your hands are full. The art piece has a central axle so it can rotate along it, the uneven shape means that one side will always weigh it down. The ticket machines at the tube station can be open and closed in both directions, they can be programmed to either an entrance gate or an exit gate.