A federal report released on Oct. 6 concludes that a Dallas Cowboys football practice facility collapsed last May under wind loads that were significantly less than those required to be resisted under applicable design standards. The report was released for public comment by the U.S. Commerce Dept.’s National Institute of Standards and Technology (NIST). The Irvine, Texas, facility failed during a severe thunderstorm, injuring 12. Based on national standards for determining loads and for designing structural-steel buildings, NIST found the wind load on the facility’s series of identical, rib-like steel frames, which supported a tensioned fabric covering, were greater than
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.