Evolution of shock transmission units (STUs) -- Seismic protection systems -- Shock transmission units and their applications -- STUs for new highway bridges -- STUs for existing highway bridges -- STUs for new and existing railway bridges -- STUs for cable-stayed and suspension bridges -- STUs for buildings -- The snubber : a special type of STU for nuclear power plants and pipelines -- Miscellaneous applications of STUs -- Installation of STUs on structures -- Cost-effectiveness of STUs -- Load testing of STUs -- Inspection and maintenance of STUs -- Design guidelines for procurement and selection of STUs -- Derivatives of STUs -- STUs in conjunction with other seismic-protection devices.