The first actual application to a demonstrative strategic building of a special base isolation/supplemental
damping system, where fluid viscous spring-dampers are coupled to steel-Teflon sliders, is presented in this
paper. The results of a testing campaign aimed at assessing the interference of the dissipative actions of the two
component devices, as a final step of the research studies previously developed by the authors on this
technology, are summed up. The design and performance evaluation analyses carried out on the building are
then discussed. Highlights of the construction works and technical installation details are finally illustrated.
