Helical spring mounts have been around for many years, but our company pioneered the use of springs designed with diameters equal to or approaching their operating height. The SLF configuration is used without housings for maximum vibration attenuation. While Mason’s telescoping Type C casting does introduce some damping, all of the other housings encase the spring without interfering with its action. The Type KIP and KIJ can be cast into foundations poured in place. The springs are adjusted to elevate the foundations. Types SLR or SLRJ are restrained spring mountings with operating heights equal to installed height and interlocks for safety in wind loads. Vertical limit stops prevent spring extension when weight is removed. Mountings carrying 15,000 pounds or more are usually designed with hydraulic adjustment to save time and effort. Another Mason Industries contribution to the art.