Features
By Robert J. Quinn, P.E.
The new home of the Guthrie Theater, in Minneapolis, replaces a single-stage venue with an intriguingly complex performance hall that includes three separate stages, an ethereal elevated lobby, and what may well be the longest occupiable cantilevered space in the world.
By Erik L. Nelson, Ph.D., P.E., M.ASCE, Deepak Ahuja,P.E., M.ASCE, Stewart M. Verhulst, P.E., M.ASCE, and Erin Criste, M.ASCE
A thorough investigation of a roof collapse calls into question certain decisions with regard to bridging layout and design loads for uplift. But the central question is, does the fault lie with the designers or with inconsistencies in the sources upon which those designers relied?
By Tim J. Ingham, Ph.D., S.E., M.ASCE, Brad Fristoe, and Ron Hollingsworth
In 1964 one of four Pratt trusses supporting Alaska’s Million Dollar Bridge—a historic landmark constructed circa 1910—collapsed into the river during an earthquake. More than 40 years later, engineers devised a scheme to repair the bridge by carefully lifting the truss from the icy waters and rehabilitating it. Next, the bridge will be strengthened to ensure that a similar earthquake in the future will not produce the same result.
By Foo Hee Kiang, William W.L. Yong, P.E., and Don D. Ratnayaka
As water consumption in Singapore has increased, alternative sources have been explored. In addition to using reclaimed municipal wastewater, Singapore’s Public Utilities Board has turned to seawater, constructing one of the largest and most energy-efficient desalination plants in the world.
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