When choosing the proper optical table and optical table supports, it is important to evaluate the sensitivity of the experiment being placed on the optical table and the vibration sources present both on the table and in the surrounding environment. The external forces (due to vibrations) acting on an optical table may be static (e.g., bending or twisting as a result of a large mass being placed on the tabletop) or dynamic (e.g., vibrations from a motor placed on the tabletop). Dynamic forces may also be coupled into the table from the building itself, passing traffic, earth tremors, elevators, et cetera. Optical tables are designed to be rigid structures that damp the vibrations created on or transferred to the optical table surface while optical table supports are available with vibration isolation systems that minimize the transfer of external vibrations to the table surface.