SEGMENTAL BRIDGE DESIGN SAVES STATE $2.3 MILLION

Several innovations developed by the designer of the $15.3 million Long Key Bridge at Marathon, Fla., are utilized in the design and construction of the bridge. None of these have been used before in the United States, and some have never been used anywhere. The erection scheme is a span-by-span method that will permit a construction rate of an estimated two spans per week, or approximately 236 feet of completed bridge deck. This method utilizes an adjustable temporary erection truss which enables the segments of an entire span to be placed and aligned prior to stressing the post-tensioning tendons. The new procedure also makes it possible for the post-tensioning tendons to extend the entire length of each span. The span-by-span erection system makes still another cost-reducing feature feasible. For the first time, epoxy is eliminated from the joints of this precast segmental bridge.

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Filing Info

  • Accession Number: 00314819
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 27 1980 12:00AM