One Rincon Hill South Tower

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Height: Architectural 184.4 m / 605 ft
Height: Occupied 167.6 m / 550 ft
Height: To Tip 184.4 m / 605 ft
Floors Above Ground 54
Floors Below Ground 7
# of Elevators 4
Top Elevator Speed 6.1 m/s
Tower GFA 70,792 m² / 761,999 ft²
# of Apartments 376


Official Name One Rincon Hill South Tower
Name of Complex One Rincon Hill
Structure Type Building
Status Completed
Country United States
City San Francisco
Street Address & Map 425 First Street
Postal Code 94103
Building Function residential
Structural Material concrete
Proposed 2005
Construction Start 2006
Completion 2008
Rankings Click arrows to view the next taller/shorter buildings
Regional Ranking #383 Tallest in North America
City Ranking #9 Tallest in San Francisco

Companies Involved

Developer Urban West Associates
Design Solomon Cordwell Buenz
Structural Engineer
Design Magnusson Klemencic Associates
MEP Engineer
Design CB Engineers
Main Contractor Bovis Lend Lease
Other Consultant
• Building Monitoring Kinemetrics Inc.
• Environmental Langan Engineering
• Geotechnical Langan Engineering
Material Supplier
• Cladding JORDAHL

About One Rincon Hill South Tower

One Rincon Hill anchors the redeveloping neighborhood of Rincon Hill in San Francisco, California. The all-residential tower is located on a narrow site just eight miles from the San Andreas Fault. In response to being built in this highly seismic region, the project employs a first-of-its-kind structural system, using a nontraditional Performance Seismic Design approach (PSD), the first ever to be approved in California.

This structure features a concrete ductile core wall and four concrete outrigger columns connected by buckling restrained braces. The PSD design eliminated the need for an exterior moment frame which reduced overall cost by 8%, increased individual unit areas, allowed unobstructed views, shortened construction time, opti-mized material quantities, and enhanced performance.

Another first in this project is the tuned liquid-mass damper, the first to be employed in the U.S. Two 54,000-gallon tuned liquid sloshing damper tanks located at the building’s top use the motion of sloshing water to counteract wind accelerations and increase occupant comfort.

Throughout the design development process the structural engineer undertook two different research projects. The first project focused on link beam connections at UCLA (with Charles Pankow Foundation and Webcor Concrete). The other studied post-tensioned slab/wall connections at UC Berkeley. The efforts improved One Rincon Hill’s design, led to a modification of ACI Code 318-08, and will influence future design and construction practices.


Coupling Damper System for Enhanced Performance of Tall Buildings
19 Sep 2012 – Constantin Christopoulos, Associate Professor, U of Toronto

Research Papers

Partial Occupancies for Phased and Multi-Use Tall Building
Aug 2008 – CTBUH Journal, 2008 Issue III

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