TEB Bridge- Nalley Valley I/C
Tacoma, WA
Project Description
The Temporary Eastbound (TEB) bridge carried eastbound traffic for approximately 5 years during phase 2 and 3 of the Nalley Valley I/C project. The temporary bridge was removed once traffic was placed into the final alignment.
Owner
Washington State Department of Transportation (WSDOT)
Contractor
Atkinson Construction
Designer
McNary Bergeron & Assoc.
Our Role
McNary Bergeron & Associates assisted the contractor in procuring the contract by redesigning two expensive steel bridges to more economical concrete structures. The original Temporary Eastbound (TEB) bridge design called for rolled steel girders with a composite deck. McNary Bergeron redesigned the bridge to be precast thin-flange bulb-tee girders with at 5" composite CIP deck, which saved the Contractor and Owner over $1 million in material and labor costs. Additionally, the redesigned structure had a 3' wider roadway surface.
Total Contract Value
$5 million (for the temporary bridge)
Timeline
2008 - 2009
Construction Method and Specifications
TEB Bridge
- driven steel pipe pile substructure columns
- cast-in-place concrete pier caps
- precast thin-flange deck bulb-tee girders
- 5" CIP composite deck
- Unique longitudinal closures between girder flanges create fully composite deck with only 1 mat of deck reinforcing in CIP slab.
- Girder geometry was predetermined and optimized to minimize slab thickness
Owner
Washington State Department of Transportation (WSDOT)Contractor
Atkinson ConstructionDesigner
McNary Bergeron & Assoc.Our Role
McNary Bergeron & Associates assisted the contractor in procuring the contract by redesigning two expensive steel bridges to more economical concrete structures. The original Temporary Eastbound (TEB) bridge design called for rolled steel girders with a composite deck. McNary Bergeron redesigned the bridge to be precast thin-flange bulb-tee girders with at 5" composite CIP deck, which saved the Contractor and Owner over $1 million in material and labor costs. Additionally, the redesigned structure had a 3' wider roadway surface.Total Contract Value
$5 million (for the temporary bridge)Timeline
2008 - 2009Construction Method and Specifications
TEB Bridge- driven steel pipe pile substructure columns
- cast-in-place concrete pier caps
- precast thin-flange deck bulb-tee girders
- 5" CIP composite deck
- Unique longitudinal closures between girder flanges create fully composite deck with only 1 mat of deck reinforcing in CIP slab.
- Girder geometry was predetermined and optimized to minimize slab thickness
