FS - Free Spring series supply vibration isolation for base mounted that set up on flooring or base. These open spring isolators compress on neoprene cups and soak up lower and significant frequency vibrations. Trouble: Horizontal and vertical seismic forces are applied at the center of gravity in the unit. https://lanegztme.onzeblog.com/39681996/top-guidelines-of-structural-steel-inertia-base