These elastomer-style hanger mount vibration isolators Have got a cylindrical neoprene component housed in a rigid body. They decrease sound and vibration for smaller sized equipment, but have reduce deflection than spring-model isolators. The concrete slab isolated from and supported above the waterproofed structural slab by resilient LDS Rubber isolators https://deanvsmfz.newbigblog.com/34591259/floor-mounted-spring-isolators-no-further-a-mystery