We've isolated more than 40 hospitals worldwide. The point is simple: the building shouldn't fail, the equipment shouldn't fail, and the people inside should keep working through the earthquake and after it.
USC Hospital
Operational throughout the 1994 Northridge Earthquake, no damage.
Tan Tzu Medical Center
1.7 M sq ft, the largest isolated structure in the world.
Xindian General Hospital
Tested to 400% shear strain at UCSD.
Erzurum Hospital
Part of the Ministry of Health's modernization.
Arrowhead Medical Center
Five independently-isolated buildings.
GTB Hospital
Response to the 2001 Bhuj earthquake collapses.
For historic buildings, isolation is usually the right answer. The original architecture stays intact while the forces the building has to handle drop sharply.
San Francisco City Hall
530 DIS isolators, the largest seismic retrofit in the world.
Salt Lake City & County Building
The first seismic isolation retrofit in the world (1894 building).
Utah State Capitol
Corinthian architecture, completed 1915.
New Zealand Parliament
Conservation objectives preserved original fabric.
Oakland City Hall
18-story building retrofit.
Asian Art Museum
Former SF City Library, 200 isolators, $7B in artwork.
Isolation drops foundation forces by up to 75%. Smaller foundations mean less concrete, less steel, and more room for the architect to do something interesting.
JFK Light Rail
10 miles, 1,364 DIS isolators.
Patria Acueducto
50% fewer piles thanks to isolation.
Oakland Bay Bridge Bypass
Temporary bypass on 4 DIS bearings (2009).
Woodrow Wilson Bridge
Bascule bridge over the Potomac.
Autoroute 25
New construction.
Mexicali Bridge
Performed as designed in the April 2010 earthquake.
DIS isolators have retrofitted more than 50 bridges. Often you can skip strengthening the existing piers and foundations and just redistribute the forces instead.
Golden Gate Bridge, North Approach
Designed to withstand magnitude 8.3.
Richmond–San Rafael Bridge
55-inch isolators with triple 11-inch lead cores.
San Diego–Coronado Bay Bridge
First high-speed isolator testing program.
Eel River Bridge
Re-centered to within ¼ inch after a 7.0 magnitude event.
Feather River Bridge
Lead rubber isolators in a harsh roadway environment.
I-40 Bridge
112 isolators plus complete hardware package.
Isolation is a natural fit for data centers. Backup power, redundant networks, mirrored storage, and then a building that doesn't actually shake.
Mobile Data Center
Shipping-container facility on low-mass isolation.
King County Emergency Center
DIS's first floor isolation project.
Sometimes the contents matter as much as the building. Labs, semiconductor fabs, broadcast studios. Isolation protects assets that an earthquake would otherwise destroy.
Conexant Semiconductor Plants
Three plants protecting billions in assets.
Hughes S-12 Satellite Building
12-story retrofit completed without interruption.
Immunex Research Campus
$50 M of state-of-the-art equipment protected.
Stanford Linear Accelerator
Three million pounds, unscathed in the 1989 Loma Prieta event.
Buildings that have to keep running after a disaster. The single place from which government and rescue teams operate.
Berkeley Public Safety Building
Designed to withstand magnitude 7.0 and remain operational.
LA Regional Transportation Mgmt Center
Manages 525 miles of mainline roadway.
Decades of engineering means we can usually figure out a way to isolate it. Submerged towers, piers, historic bridges, we've seen a lot.
Berry Street Project
ATC & SEI Seismic Isolation Project of the Decade (2009).
Round Butte Reservoir Tower
Selective Water Withdrawal Tower in 200 ft of water.
Broadway Pier
Marine retrofit with stainless steel plates.
Myrtle St. Water Tanks
Utility retrofit for post-earthquake service.
