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Loop (Chicago, Ill.) (12)
Columbus Drive (Chicag... (1)

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1. Cloud Gate, attaching steel plates, assembling weatherproof tent, April 15, 2004 Cloud Gate, attaching steel plates, assembling weatherproof tent, April 15, 2004 Structural systems; Structural frames; Trusses; Steel; Construction workers; Hoisting machinery; I-beams; Skyscrapers; A worker uses a lift to reach a steel I-beam near the top of the weatherproof tent's steel structure.
2. Cloud Gate, attaching the final plate, June 28, 2004 Cloud Gate, attaching the final plate, June 28, 2004 Steel; Hoisting machinery; Construction workers; Tents; Flags; Ethan Silva, president of Performance Structures, Inc. (PSI) (left), and artist Anish Kapoor (right) look on as a worker gestures to the crane operator, out of view, to lower the last plate into place....
3. Crown Fountain, I-beams, May 27, 2004 Crown Fountain, I-beams, May 27, 2004 I-beams; Construction workers; Hoisting machinery; Trees; A worker prepares I-beams for installation atop Crown Fountain's south tower.
4. Jay Pritzker Pavilion, structural steel for the headdress, September 12, 2003 Jay Pritzker Pavilion, structural steel for the headdress, September 12, 2003 Hoisting machinery; Skyscrapers; Construction workers; Welding; A worker atop a lift welds structural steel for the Pavilion's headdress. Part of the trellis is visible in the foreground.
5. Jay Pritzker Pavilion, structural steel for the headdress, September 12, 2003 Jay Pritzker Pavilion, structural steel for the headdress, September 12, 2003 Hoisting machinery; Construction workers; Skyscrapers; Welding; A worker atop a lift welds structural steel for the Pavilion's headdress. Part of the trellis is visible in the foreground.
6. BP Bridge, outline in rebar, May 9, 2003 BP Bridge, outline in rebar, May 9, 2003 Trailers; Hoisting machinery; Skyscrapers; Cantilever construction; The path of the BP Bridge was outlined in rebar, or reinforcing bar, which was later cast in concrete. The orange caps atop the rebar spikes were for worker safety. The trailer compound in the background...
7. BP Bridge, spanning Columbus Drive, November 22, 2003 BP Bridge, spanning Columbus Drive, November 22, 2003 Girders; Construction workers; Hoisting machinery; A worker on a lift bolts a box girder to the structural steel of the eastern approach span of BP Bridge. Columbus Drive was closed to traffic for a 12-hour period as workers installed three box girders...
8. BP Bridge, spanning Columbus Drive, November 22, 2003 BP Bridge, spanning Columbus Drive, November 22, 2003 Girders; Hoisting machinery; Construction workers; Scaffolding; Cantilever construction; Skyscrapers; A worker walks across one of BP Bridge's box girders as it is being installed over Columbus Drive. Columbus Drive was closed to traffic for a 12-hour period as workers installed three box girders making...
9. BP Bridge, spanning Columbus Drive, November 22, 2003 BP Bridge, spanning Columbus Drive, November 22, 2003 Girders; Construction workers; Hoisting machinery; Scaffolding; Streets; Skyscrapers; Using a rope, a worker guides the last box girder into place as it is hoisted from above by a crane. The center box girder of BP Bridge's span is already in place at right, and the structural steel of...
10. BP Bridge, spanning Columbus Drive, November 22, 2003 BP Bridge, spanning Columbus Drive, November 22, 2003 Girders; Hoisting machinery; Construction workers; A worker guides the end of the last box girder to connect with the structural steel of the western approach span. Columbus Drive was closed to traffic for a 12-hour period as workers installed three box...
11. BP Bridge, spanning Columbus Drive, November 22, 2003 BP Bridge, spanning Columbus Drive, November 22, 2003 Girders; Hoisting machinery; Construction workers; A worker guides the end of the last box girder to connect with the structural steel of the western approach span. Columbus Drive was closed to traffic for a 12-hour period as workers installed three box...
12. BP Bridge, subframing for shingles, September 12, 2003 BP Bridge, subframing for shingles, September 12, 2003 Structural frames; Welding; Construction workers; Hoisting machinery; Scaffolding; Flags; Close-up view of subframing for the stainless steel shingles, or "scales", that will form the surface of the BP Bridge, visible along the side of the concrete foundation ramp. A worker is welding the Jay...
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