Engineers and contracting crews are breathing easier now that the most complex part has ended in building the $82-million Interstate 64 Kanawha River bridge project near Charleston, W.Va. With more than a year left to meet the project completion deadline, the bridge team already has secured a place in U.S. construction record books with a 760-ft main span of cast-in-place post-tensioned segmental box girders. That span is the longest of its type in the country, surpassing Houston’s Ship Channel Bridge by 10 ft.
General contractor Brayman Construction, Saxonburg, Pa., built the record-setting prestressed span using balanced cantilevered construction, a first in the Mountaineer State. The main span is the first of the bridge’s eight spans to be completed. Segments ranging in depth from 16 ft to 38 ft were constructed using concrete-form travelers extending from the riverbank piers, which rise 108 ft and 88 ft from their concrete footings to the base of the deck.