In late July, four 1,200-ton, 165-ft-long steel segments were erected to become a tower for the $6-billion San Francisco-Oakland Bay Bridge’s self-anchored suspension span.
Under a $1.43-billion contract, the joint venture of American Bridge, Coraopolis, Pa., and Fluor Corp., Irving, Tex., used a strand-jack gantry positioned atop the erection tower to pull the segments off a barge, lift them straight up over the tower foundation, then lower them into place.