There is a growing interest in structural vibration isolation systems to address vibration and structure-borne noise emanating from surrounding environments. Sophisticated foundation systems can be employed to support entire buildings, portions of buildings, and rail trackbeds for the purpose of mitigating vibrations and structure-borne noises that would otherwise interfere with work environments, sensitive equipment, residential settings, and entertainment venues. These systems use various types of resilient decouplers including springs, elastomeric bearings, and combinations of springs and elastomeric bearings to protect buildings, even surrounding neighborhoods, from vibrations and structure-borne noises originating from rail lines, subways, elevated trains, super-highways, and city streets. System design takes into consideration issues such as natural frequency, static and dynamic load conditions, de-bonding (in cases where elastomeric bearings are employed), and creep. These issues need to be addressed in the early design stages, typically following the filing of an environmental impact report by a qualified vibration consultant.