Isolation mounting system for railroad car steps and running boards

A mounting system for securing a support surface to a railroad car to isolate the support surface from the twisting and vibration of the railroad car to reduce fatigue of the support surface, the mounting system comprising:

• a plurality of compressible, energy absorbing bushings positioned between the support surface and the railroad car such that the support surface is spaced from the railroad car by the plurality of bushings;
• and
• a plurality of bolts each associated with one of the bushings, each bolt having an expanded head and a depending shaft, the expanded head being positioned above the support surface and the depending shaft extending through the support surface and secured to the railroad car such that the combination of the plurality of bolts and bushings secure the support surface to the railroad car,
• wherein the plurality of bushings are each compressed upon relative movement between the support surface and the railroad car to isolate the support surface from the railroad car.

A mounting system for securing a support surface to a bracket on a railroad car to isolate the support surface from the twisting and vibration of the railroad car to reduce the fatigue of the support surface, the mounting system comprising:

• a plurality of compressible, energy absorbing bushings positioned between the support surface and the railroad car, each bushing having an upstanding neck protruding through an opening formed in the support surface;
• and
• a plurality of bolts each associated with one of the bushings, each bolt having an expanded head and a depending threaded shaft, the expanded head being positioned in contact with the upstanding neck of the bushing and the threaded shaft extending through the upstanding neck of the bushing and the support surface, the threaded shaft being secured to the railroad car to secure the support surface and the bushing to the railroad car,
• wherein the expanded head of the bolt is spaced from the support surface by the upstanding neck of the bushing such that the plurality of bushings are compressed upon relative movement between the support surface and the railroad car to isolate the support surface from the railroad car.