Sabo Bridge reopening Nov. 19

Structural repairs are done on the Sabo bike and pedestrian bridge, where support cables broke loose last winter. Crews have completed all necessary structural work, and the bridge will reopen to traffic the afternoon of Monday, Nov. 19. Temporary closures may be necessary in 2013, for painting, lighting and screen installation.

The work included installing and retrofitting diaphragm plates on the bridge’s pylon, including the plate that fractured and caused a pair of suspension cables to break loose. Wiss, Janney, Elstner Associates, Inc., an engineering firm hired to find the cause of the fracture, concluded in June that wind-induced cable vibrations caused fatigue cracking in the diaphragm plates resulting in two cable connections fracturing. The retrofitted and replaced plates are designed to withstand fatigue that caused the cracking. 

In addition to fixing the diaphragm plates, crews have replaced both cables that broke loose. They’ve also installed monitoring equipment to make sure the repairs are all working properly.

The Sabo Bridge is a 215 foot-long cable-stayed suspension bridge that opened in November of 2007 to carry Midtown Greenway bicycles and pedestrians over Hiawatha Avenue. Hennepin County was the lead agency for the planning, design and construction oversight of the bridge, which was turned over to the City of Minneapolis when construction was completed.

Published Nov 19, 2012



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