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Viscous Damper: The Latest Architecture and News

The Engineering Behind San Francisco's Safest Building

This article was originally published by Metropolis Magazine as "The Skyscraper's Innovative Structure is Changing the Game for Earthquake Design".

The most remarkable thing about 181 Fremont—San Francisco’s third-tallest tower, designed by Heller Manus Architects—is not the penthouse’s asking price ($42 million). Rather, it’s an innovative yet unglamorous structural detail: a viscous damper system that far exceeds California Code earthquake-performance objectives for buildings of 181 Fremont’s class, allowing immediate reoccupation after a seismic event.