Heller Manus Architects: The Latest Architecture and News

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.

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181 Fremont—which will become the third tallest structure in San Francisco and the most resilient tall building on the West Coast of the U.S.—has been awarded the REDi™ Gold Rating, a new earthquake resilience rating. The building was designed by San Francisco-based Heller Manus Architects.

The 56-story mixed-use tower, built above five basement levels, is being constructed in compliance with a new set of holistic design and planning guidelines—the Resilience-based Earthquake Design Initiative (REDi Rating System)—that allow it to withstand the impact of a 475-year seismic event (roughly a M7.5-M8.0 earthquake on the San Andreas Fault) with minimal disruption.

Developed by Arup with contributions from external collaborators, the REDi™ system outlines design and planning criteria within a resilience-based framework, creating a system that not only considers occupant safety but also takes into account the future of the building after an earthquake.

Foster + Partners, with Heller Manus Architects, has been commissioned to design a two tower, two million square foot mixed-use development in San Francisco. The expansive “First and Mission” will be marked by a 605-foot “world class condominium” tower - which will be the tallest residential project on the West Coast - and a 850-foot “large floor plate office tower.” Together they will add more than a million square feet of flexible office and commercial space, as well as 650,000 square feet of residential units to the Transbay Area.