| 1. |  | Cloud Gate, fabrication, December 17, 2002 | Structural frames; Metalworking; | Close-up of a section of the sub-frame structure during fabrication. The sub-frame sections were attached directly to the back of each of the curved plates that later would form the mirror-like "skin"... |
| 2. |  | Cloud Gate, trial assembly in Oakland, California, structural steel, ca. April 21, 2003 | Steel; Hoisting machinery; Industrial facilities; Structural systems; | A crane lifts one of the structural steel rings of the sculpture off of a pallet in Oakland, California. The structural steel was fabricated by Advanced Building and Metal Fabrication in Chico, California,... |
