A magnitude-7.5 quake, simulated by a shake table on July 14, proved performance-based seismic design is valid for a six-story, wood-frame residential building on a one-story steel frame. Damage was negligible, say investigators from Colorado State University and Simpson Strong-Tie. Photo: Simpson Strong-Tie Company Inc. Related Links: Jumbo Quake Test Validates Design: Magnitude 7.5 Tembler Jolts Connections
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.