Changing the face of Charleston : The unbuilding of the Grace and Pearman Bridges
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Unbuilding Highlights
(Apr 10)
Meeting St. Stories
(Jul 10 2006)
East Bay Stories
(Oct 10 2006)
Drum Island Stories
(Feb 17)
Pearman Bridge Stories
(Apr 3)
Grace Bridge Stories
(Apr 3)
Imposions: Prep and boom
(Mar 27)
Unbuilding Bridge Blog
(July 23 2006)
Unbuilding Challenges
(Mar 13)
Learning Links
(Feb 20)
Unbuilding Stories
(Mar 13)
Video and Sounds
(Feb 28)

September 3 2005:
Pearman Superstructure Preparation

As roadway is removed from the Pearman bridge that spans Town Creek, there is less downward stress on the supports. Consequently, the support might have a tendancy to rise vertically, placing a significant new stress on the pins that tie the steel superstructure to the supporting concrete structure.

Here is the end of the Pearman over Drum Island - and work platform for securing the end of the Pearman superstructure

A closer view of the work

On the left you can see a pair of vertical channels with two horizontal angle iron brackets. On the right, the guys are preparing to add the two horizontal angle iron brackets

Preparing to weld (with your curious eyes, you can see the welding rod in his right hand)

About 30 min later - last weld on the top bracket

Cleaning the weld - but the big question for me is what is the purpose of this addition?

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Attribution: C. Frank Starmer and Sparky Witte from http://oldcooperriverbridge.org