Скачать или смотреть Modjeski and Masters - Lift Bridge Construction Time-Lapse

The Elgin, Joliet and Eastern (EJE) Railway Bridge Number 552 has taken its share of hits. More than its share, in fact. It held the undesirable distinction being considered the most frequently hit bridge in America. No other bridge is hit as often and with such predictability by water borne traffic. The US Coast Guard finally decided enough was enough -- they declared the bridge unreasonably obstructive and eligible for alteration under the Truman-Hobbs Act.

Modjeski and Masters was selected by the EJE Railway Company (owned by Canadian National Railway) to create a strategy that would take EJE Railway Bridge Number 552 off the top of the hit list. The structure is comprised of four 154-ft through truss spans, including a vertical lift channel span. Our innovative team of structural, mechanical and electrical bridge designers was tasked with increasing the horizontal navigational clearance of the channel lift span from 120 ft to 300 ft. The solution: to design a new 348-ft vertical lift bridge to replace three of the existing spans. The new bridge was aligned such that one of the existing truss spans could remain in service, thereby minimizing project cost. To construct the new lift bridge without restricting river traffic, the McHugh Construction Team devised a temporary erection and launching runway structure allowing the 1,100-ton span to be replaced and made operational in 84 hours.

Experience great bridges: connect with us at http://www.modjeski.com/

Time-lapse photography courtesy of McHugh Construction Co. http://www.mchughconstruction.com/