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Highways for LIFE

Arrow UHPC Waffle Bridge Panels

Full Depth Ultra High Performance Concrete (UHPC) Waffle Bridge Panels

Open House

Location: Coreslab Structures, Omaha
802 Allied Rd
Bellevue, Nebraska

Date: Thursday, July 29th, 2010
Time: 8:00 am – 2:00 pm

Draft Agenda


  • 8:00 – 10:00 Presentations and Q & A - topics to include:
    • Introduction (Ben Graybeal, Research Structural Engineer, FHWA)
    • Overview of Project and Production Process (Todd Culp, Vice President, Coreslab Structures, Omaha)
    • UHPC Material Properties and Benefits (Vic Perry, Vice President, Ductal)
    • UHPC Joint Fill Process (Vic Perry)
    • Waffle Slab Research and Testing (Sri Sritharan, Wilson Engineering Associate Professor, Iowa State University)
    • Waffle Slab Design (Dean Bierwagen, Office of Bridges and Structures, Iowa DOT)
    • Bridge Construction (Brian Moore, Wapello County Engineer)
    • Identification of Nationwide Implementation Challenges (Bruce Johnson, Oregon DOT)
  • 10:00 – 12:00
    • Observation of Waffle Panel Fabrication
    • Plant tour (e.g., batching, casting, curing, architectural finishing)
  • 12:00 - Box lunch
  • 1:00 - 2:00 Open discussion
    • Strategies to address nationwide implementation challenges
    • Q & A

To register: Contact Julie Zirlin, Highways for LIFE Technology Partnerships Program Manager 202-366-9105 or

Coreslab Structures, Omaha received a Technology Partnerships grant to develop the full depth waffle deck panels. The first application is planned for a replacement bridge in Wapello County, Iowa in the fall 2010. With the deck panels designed specifically for this project, the validation of the assumed structural performance characteristics of the UHPC waffle deck, critical connections, system performance, and rideability of the panel surface were assessed through an experimental program at the structural laboratory of Iowa State University (ISU).

For this project, two prefabricated, full–depth, UHPC waffle deck (8ft x 9ft 9 inches x 8 inches) panels were connected to 24–ft long precast girders and the system was tested under service, fatigue and ultimate loads. In addition, the response of the system was evaluated using a detailed 3D finite element model. The results from this investigation and recommendations for using these panels in the Wapello County bridge project are now available in the Phase I report at

More Information



Julie Zirlin
Center for Accelerating Innovation

Updated: 04/04/2011

United States Department of Transportation - Federal Highway Administration