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Laser scanning technology helped a Minnesota bridge find its third home
One of 24 historic bridges chosen for preservation by the Minnesota Department of Transportation, Bridge 5721 is one of the state’s only remaining wrought iron bridge structures. The bridge was originally built to carry pedestrians over a river in Sauk Center, Minnesota, in 1870, before modern steel production methods had become available. In 1937, the bridge was disassembled and moved to span the Little Fork River near the town of Silverdale. But more than two years ago, the structure began its journey to a third incarnation, this time as an equestrian and pedestrian bridge for the Gateway Trail in the town of Stillwater, near Minneapolis. Because of the bridge’s provenance and the desire to keep its wrought iron parts intact, the Minnesota DOT worked with new owner Minnesota Department of Natural Resources and structural engineers at HNTB and Olson & Nesvold Engineers (O.N.E.) to collect crucial data for the rehabilitation using new 3-D laser scanning technology.
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Following a heavy snow storm this weekend, the roof of the Minneapolis Metrodome collapsed. This video shows the structure creaking under the weight, the roof fabric tearing, and snow pouring in on the field. It looks like a scene from The Day After Tomorrow. Blair Kamin was quick to point out that though the stadium was designed by the Chicago office of SOM, the roof was the work of New York-based Geiger Berger Associates. Buffalo, New York-based Birdair Structures maintains and supplies the roof fabric. No one was hurt in the collapse. According to the Minneapolis Star-Tribune, this is the fourth time roof has ripped and deflated. Officials are still determining how low it will take to repair the structure.
As architects struggle to find work, a good place to turn has been the “green” market, especially adaptive re-use (“weatherizing,” as the president likes to call it). Well, here’s an extreme case: On Friday, Curbed noticed a proposal by Minneapolis firm City Desk Studio to transform a skyway into, among other things, a lakeside retreat. Better yet, it was being offered on Craigslist. For $79,500. Our jaws firmly dropped, we decided to call the firm up to find out more. Read More