December 6, 2022 - 5:00pm to 7:00pm

Curved Tubular Flange Girders: I-95 Section BR2

STV recently completed the design of the first curved steel tubular flange girder bridge in the United States. The use of a tubular flange in place of a standard plate increases the structural performance while reducing fabrication and erection material, as well as erection time compared to standard plate flange curved girders. Additional several advantages include overall weight savings, minimizing required under clearance, simplifying erection, and eliminating cross frames or diaphragms.

The use of steel plate flanges has been the standard for straight and most curved girder bridge applications. Lehigh University performed research supporting the design of curved steel girder bridges with tubular flanges. PennDOT is constructing this innovation as part of an interchange project on Interstate 95 in District 6. The site constraints for erection are very challenging with overhead utility lines and rail lines below the bridge. Therefore, this type of design is a good fit.

The project is currently under construction by Buckley & Company, Inc. and the TFGs are being fabricated by High Steel Structures in Lancaster, PA, tube steel was provided by Atlas Tube Corp. Steel in Chicago, IL and the tubes were bent by Chicago Metal Rolled Products in Chicago, IL.

Learning Objectives:

  • Understand the history and different types of tubular flange girders
  • Overview of the project and site conditions that lead to the selection of this girder type
  • Design methodology, fabrication challenges, and construction techniques used on the project.


1 CE credit will be issued for this event. CE certificates will be emailed to all attendees within a week after the event.


Cliff Dwellers Club

200 S. Michigan Ave, 22nd Floor

Chicago, IL 60604

This is an in person event with the speaker presenting remotely.


  • Caesar Salad tossed with Caesar Dressing topped with Parmesan and Croutons
  • Stuffed Chicken Breast with Spinach, Pine Nuts and Sundried Tomato
    • Served with chef’s appropriate accompaniments of vegetables and starch
  • Chocolate Mousse with berries


Presentation time: 6:00 – 7:00 pm

Cocktail hour: 5 – 6 pm


In Person:

Member - $60

Non-Member - $90

Live Streaming:

Member - $30

Non-Member - $45

About the Speaker

Geoffrey N. Stryker, P.E.

Engineering Director/Vice President - STV Incorporated

Geoffrey N. Stryker, PE, is a Vice President and Engineering Director at STV Incorporated with over 20 years of structural engineering and design experience. He currently serves as the Project Delivery Director for Pennsylvania and New Jersey and has been the project manager for the I-95 BRI project since 2012.



Michael LaMont ( LaMont Advisory Services, LLC )
Joseph Lowrance ( Farnsworth Group )
Matt Thomas ( Thornton Tomasetti, Inc. )
Enji Papazisi ( HNTB Corporation )
Tom Kurtenbach ( IDOT Bureau of Construction )
Steven Jastrzebski ( Sargent & Lundy )
Stacey Ceretti ( Envista Forensics )
Erin Kolasinski ( Ciorba Group Inc. )
Wenjing Li ( HDR, Inc. )
Jon Sfura ( Wiss, Janney, Elstner Associates, Inc. )
Robert Davies ( Retired )
Jessy Rojas ( GKE, LLC )
Jeff Ruhde ( Burns & McDonnell )
Jan Blok ( The Structural Group, Ltd. )
Cathleen Jacinto ( FORSE Consulting, LLC )
R. Bradlee Fletcher ( Atlas Tube/Zekelman Industries )
Charles Pigozzi ( Ciorba Group, Inc. )
Salvatore DiBernardo ( Ciorba Group )
Barry Kravitz ( HDR, Inc. )
George Gorrill ( STV Incorporated )
Joshua Muller ( STV Incorporated )
Maxwell Van West ( STV Incorporated )
Shriya Saridana ( STV Incorporated )
Mathew Ingram ( Jacobs )
Joseph Hosanna ( Gannett Fleming )
Derek Boeldt ( Jacobs )
Jennifer Traut-Todaro ( The Structural Group )
William Colletti ( TranSystems )
Jorge Medina ( Burns and McDonnell )
Danielle Peterson ( Jacobs Engineering Group )
William Kolbuk ( Sargent & Lundy LLC )
Lawrence Kirchner ( TranSystems )
Raul Tejada ( HR Green )
Brian Boysen ( Burn & McDonnell Engineering Company, Inc )
Sam Mittal ( STV Inc. )