Photo by Tom Sawyer New York City building permits are sprouting up with QR codes that instantly unlock vast amounts of project information. Buildings Commissioner Robert LiMandri thought of it, and so far, New York City may be the only city doing it, experts say, although they believe the idea will spread to other cities soon. Related Links: On the Road to Digitization Speeding Construction Recovery With Streamlined Code Review Building permits posted on New York City construction sites are sporting an intelligent look these days as older permits give way to new ones bearing QR codes—those stamp-like squares of
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.