June Technical Speaker 2

Gowen Dishman, P.E. Bio

Resident Engineer

HNTB Corporation

This presentation will discuss the construction of the main span of the New Tappan Zee Bridge Project over the Hudson river in New York. It will highlight some of the design features of the main span and how the contractor proceeded with the construction. 

  • Major Components of the Superstructure:
  • Edge Girders
  • Anchor Pipes
  • Floorbeams (Type 1 and Type 2)
  • Redundancy Truss
  • Support Struts
  • Precast Panels
  • Stay Cables
  • Tower Anchor Boxes and SIPs
  • Operations for Erection of Superstructure Components
  • Field Section Assembly (Tomkins Cove)
  • Field Section Erection
  • Stay Installation (Force 1A)
  • Panel Installation (Force 1B)


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