What we're working on.

Dynamic Isolation Systems has developed technology that provides protection against vertical accelerations in low-mass applications during a seismic event.

Seismic isolation is generally engineered to protect against horizontal accelerations in an earthquake; however, in certain applications significant vertical accelerations are also present, and until now there has been no effective solution to minimize the resulting forces and motions.

Recently, DIS was approached by the engineers of a major hydro-electric dam project seeking protection for the dams' operational equipment, located atop the structure. The equipment was designed to meet IEEE 693 high-performance spectra. Engineers at DIS developed a system which provides X, Y, and Z isolation far in excess of the anticipated needs of the project. The spectral accelerations were reduced by a factor of 18, protecting the equipment against the most extreme conditions.

Every project is different, DIS engineers are confident that a solution can be found to protect virtually any equipment against earthquakes.

Dynamic Isolation Systems recently tested a full-size structure on the world's largest shake table in Japan. The project was conducted for the U.S. Nuclear Regulatory Commission to study ground motions at U.S. nuclear sites. The NRC tests clearly showed the benefits of incorporating DIS isolation systems into nuclear facilities, accelerations were reduced by more than a factor of 3 in the building.

Tests used earthquakes likely to occur at various U.S. nuclear facilities and recent strong motions, including the 2011 Tohoku Earthquake. The Kobe facility is a $500 M complex with a shake table capable of replicating a Magnitude 8.0 earthquake while supporting a full-scale structure weighing up to 1,000 tons.

The 175% MCE test for the Vogtle site in Georgia reached a peak ground acceleration of 1.6g.

The first Viscous Wall Dampers in North America, built by DIS, are being installed on the Geary Van Ness Medical Center in San Francisco. The Wall Dampers were featured on CBS SF Bay Area News on Aug 17, 2015.

The Wall Dampers are being fabricated and tested in Dynamic Isolation Systems' plant in Reno, Nevada. The DIS VWD has been used extensively in Japan for more than 20 years across more than 100 projects.