Erecting/Moving/Raising/Floating a 1600 Ton Lift-Span Truss

摘要

The new Fore River Bridge (a 328-ft, 1600 ton vertical lift span truss) will replace an existing“temporary” ACROW Bridge lift-span. The new truss was constructed on land on 20ft steel towers, rolled ontotwin 54ft x 180ft barges on four sets of two (8) axle SPMT units, lifted to a final vertical height of 70ft above thewater with self-raising towers and then floated into position with 3” of clearance between the erected towers andeach end of the bridge.