Sylvan Avenue Bridge Over Trinity River – Dallas, Texas


  • Sylvan Avenue Bridge Over Trinity River – Dallas, Texas
  • Sylvan Avenue Bridge Over Trinity River – Dallas, Texas
  • Sylvan Avenue Bridge Over Trinity River – Dallas, Texas
  • Sylvan Avenue Bridge Over Trinity River – Dallas, Texas
  • Sylvan Avenue Bridge Over Trinity River – Dallas, Texas

Project Summary


Spliced, Precast Concrete I-Girder Bridge

The Sylvan Avenue Bridge is a 23 span bridge composed of precast I-girders utilizing a combination of pre- and post-tensioned construction. There are 3 post-tensioned units, each consisting of 3 spans. The typical post-tensioned I-girder is 6’-10” deep with some of the I-girders having a variable depth between 6’-10” to 10”-10”. To reduce construction costs, Summit developed an integral corbel system to support the girders during construction of the post-tensioned units. This eliminated the need for external strongbacks at 132 total splice locations. The existing Sylvan Avenue Bridge sits at a low elevation in the Trinity River floodplain and is impassable at times of high water. The new bridge raises the profile of Sylvan Avenue out of the floodplain to provide uninterrupted traffic access year round.

Project Cost: $42 Million

Client: Webber and Bexar Concrete Works, LTD.

Services Performed


  • Construction Load history analysis
  • Construction Engineering, design of all falsework, integral corbel supports, & girder bracing
  • Development and design of integral corbel supports eliminating the need for strongbacks during erection
  • Erection Engineering for precast girders. Design of lifting equipment and rigging, and evaluation of erection sequencing
  • Development of girder shop drawings
  • Revised section design and analysis to accommodate existing formwork
  • Girder handling analysis
  • Production support

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