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Subject.TGM Construction Workers (4) Girders (4) Skyscrapers (3) Hoisting Machinery (3) Scaffolding (3) Show more... Photographer Unknown (4) Neighborhood Loop (Chicago, Ill.) (4) Columbus Drive (Chicag... (2)

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	Image:	Title:	Subject.TGM:	Description:

1.		BP Bridge, spanning Columbus Drive, November 22, 2003	Hoisting machinery; Girders; Scaffolding; Construction workers; Streets; Skyscrapers;	On November 22, 2003, Columbus Drive was shut down to traffic in both directions for 12 hours to allow the Bridge’s spans over Columbus Drive to be put into place. Three box girders were hoisted into...

2.		BP Bridge, spanning Columbus Drive, November 22, 2003	Hoisting machinery; Construction workers; Girders;	The central box girder is lowered into place on top of a central concrete pier in the median strip of Columbus Drive during a 12-hour period when the busy six-lane road was closed to traffic. The...

3.		BP Bridge, spanning Columbus Drive, November 22, 2003	Construction workers; Welding; Girders; Scaffolding; Skyscrapers;	Once the box girders were lowered into place they were secured together with bolts and then welded together for strength.

4.		BP Bridge, spanning Columbus Drive, November 22, 2003	Girders; Construction workers; Hoisting machinery; Streets; Scaffolding; Skyscrapers; Fog;	The final box girder is lowered into place by a crane as Columbus Drive is closed to traffic for a 12-hour period. The structural steel for the Bridge was made by Littell Steel of Pittsburgh, Pennsylvania,...

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