| 1. |  | Cloud Gate, fabrication, December 17, 2002 | Machinery; Steel; Industrial facilities; Machine shops | A steel plate beneath a precision measuring device called a Faro arm. A Faro arm is an automated scanning device that checks measurements against computer models and calculates whether they are within... |
| 2. |  | Cloud Gate, fabrication, milling, April 21, 2003 | Steel; Milling machines; Machine shops; Structural frames; Industrial facilities; | A milling machine is used to remove excess material from a steel plate. In order for the steel plates forming the sculpture to fit together, the dimensions and curvature of each plate had to be exact to... |
