Faith in the quality of structural-steel building-information-model file transfers between different BIM platforms increased recently, thanks to a series of digital-data-exchange validation tests performed under the auspices of the American Institute of Steel Construction. The news is good: Each of the six transfers studied was extremely accurate. Some even had as little as 0.3% error, which matches human error, say researchers."We have established a trust and comfort level with the [data exchange] process," said Brian Cobb, chief operating officer of Structural Detailing LLC (SDLLC), Brentwood, Tenn., at AISC's 2012 North American Steel Construction Conference, held on April 18-20 in Grapevine,
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.