“The complex geometry, combined with the different structure types and construction methods, makes this an impressive urban project that is suitable for the location. Very cost competitive vs. steel alternative.”
American Segmental Bridge Institute Bridge Award of Excellence 2003
I-93 Viaducts and Ramps
Owner: Massachusetts Department of Transportation
Design / Construction Engineering and Inspection: FIGG
These multi-level ramps and viaducts efficiently move 200,000 cars daily into and out of Boston’s “Big Dig.” The project features the tightest curvature of any precast concrete segmental bridge in America with horizontal curve radii down to 212’. The total bridge deck area is 520,000 square feet. Spans ranging from 100’ to 200’ were built in span-by-span and balanced cantilever construction over numerous active railroad lines and roadways. The concrete alternate design saved the Owner $27 million over the steel design.