Traditional evaluation of structural soundness relies on measurements, calculations, observations and assumptions, but now engineers have a new tool that brings a far greater level of precision to the processes. Photo: STRAAM A utility had to cut cladding on a cooling tower and worried how far it safely could go. Analysis showed it danced in the wind but was safe. Formed in 2008, Easton, Md.-based STRAAM LLC—which stands for “structural risk assessment and management”—offers a service that records movement in any kind of structure, from buildings and bridges to cooling towers and wind turbines. Its instruments report the least tilt,
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.