We welcome any comments or additions to this list so that we can keep it up to date. For instructions, please go to our feedback page. Each damper consists of 4 modules in a K-brace config. Los Angeles Police Dept. 1997 Retrofit of a long building with multiple expansion gaps.
Dampers restrict relative movement between building sections.
Retrofit of historic building approx. 1997 New construction of a cable stayed bridge. Dampers used to control longitudinal earthquake movement while allowing free thermal movement. 1990 Deck isolation for swing bridge. 1996 Ballroom floor tuned mass damping system to eliminate perceptible vibrations due to dancing input and other potential input motions.