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Vibration pads mounted in horizontal orientation

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I have a project where we need to attach a stair to a structural steel frame supporting a module that contains sensative monitoring equipment.  The owner wants to minimize the vibrations coming from people walking up the stairs so we need to put some sort of elastomeric vibration pads between the stairs and the frame.  I need to orientate the pads so that they can support the gravity loads in shear, not in bearing as is typical for heavy machinery.  Also, this project is in the polar reagions, so I need the elastic material to be workable down to -40 degrees.

Anyone have some leads for these types of pads?.  I have found several manufacturers for the typical machinery pads, but they are loaded in compression not shear.

TIA.