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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)

November 15, 2006: Unbuilding the last truss sections

Even with the rain, Sparky manages to provide a quick progress report. Here, Chris, Manny and our Ironworker acrobats are unbuilding the last of the truss sections - now supported by the braces installed over the past month.

Ken Canty gave me some insights into the supporting structures. According to Ken, the original drawings for the Pearman called for two supports while building the truss sections at the port. Clearly during the building phase, the base of the trusses had to support some heavy equipment. Without the heavy equipment the load will be less, but in this case, engineering judgement called for build two supports for unbuilding similar to those used during the building 50 years ago.

nov_15_sparky_001_unbuild.jpg

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