Wall (1 of 2) (IMAGE)

University of California - San Diego

Wall (1 of 2)

Caption

Engineers tested two types of retaining wall systems -- one without a sound barrier (foreground) and one with a sound wall (background) during a series of rigorous simulated earthquake tests at UCSD's Englekirk Structural Engineering Center, which has the largest outdoor shake table in the world.

Credit

UC San Diego

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