I-95 Exit 27A Bridge
Adding a second lane of traffic to a Bridgeport, Conn. bridge took a little fit-up creativity and a clever geometry control system.
The tight curvature and high skew of Exit 27A on northbound I-95 contributed to significant torsion, which needed to be transferred through cross frames between girders. The design team incorporated lateral bracing between the bridge’s two new curved girders in order to resist additional torsion and avoid additional strain on the existing structure when adding the new lane.
Take a brain break this afternoon with our weekly puzzle featuring this interstate bridge widening projects! Then reengage your brain with a full account of the project’s load transfers at aisc.org/bridge-brilliance.