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Sidney Lanier Bridge

Brunswick, Georgia

Market Sector




Services Provided

Construction Phase Services, Design, Seismic Analysis and Design



T.Y. Lin International provided complete design and construction support services for this new 2,500-foot long cable-stayed bridge across the Brunswick River in Georgia. The original lift-span structure that opened in 1956 was declared a hazard to navigation. The new replacement structure increases shipping access to the Port of Brunswick.

Project Highlights:

  • TYLI’s design was competitively bid against steel alternatives and won based on its lower bid price.

With a total length of 7,780 feet, the new cable-stayed bridge consists of two 625-foot side spans and a 1,250-foot main span. The width of the bridge is 71 feet between curbs. The navigation channel has a minimum horizontal clearance of 400 feet and a vertical clearance of 185 feet. The minimum clearance between pier protection islands is 1,040 feet. Supported by 176 stay cables, the main span is anchored into twin pylons rising 480 feet above the surface of the river. Approach spans measure 180 feet in length and are comprised of precast concrete post-tensioned girders with conventional cast-in-place decks. The span layout successfully addressed the concerns posed regarding hazards to navigation with the existing lift span.

The four-lane superstructure of the bridge consists of an 11-inch-thick concrete slab supported by a 5 x 4.5 feet concrete longitudinal girder at each edge and by intermediate transverse girders spaced at 27 feet, 8 inches. The overall width is just short of 80 feet. The bridge’s support system has two concrete pylons and two concrete anchor piers. At the pylon piers, the superstructure is free to move in the longitudinal direction and restrained in the vertical and transverse directions. The concrete deck is cast monolithically with the two anchor piers. Each concrete pylon carries two planes of fan-shaped cables anchored to the edge girders. In addition to performing preliminary and final design for the bridge, T.Y. Lin International provided on-site construction support to assure construction quality and to facilitate construction. The services included review of contractor’s submittals such as stage-by-stage erection analyses, shop drawings, and material certifications; respond to contractor’s RFIs; and address construction non-conformance issues.

Design Award, 2006
Concrete Reinforcing Steel Institute (CRSI)
Honor Award, 2005
Consulting Engineers and Land Surveyors of California (CELSOC)
Globe Award, 2005
American Road and Transportation Builders Association (ARTBA)
Bridge Award of Excellence, 2005
American Segmental Bridge Institute (ASBI)