A Memorial’s Moving Parts
Engineers have devised a series of colossal “ball-in-box dampers” designed to dissipate wind energy in the new Air Force memorial, which was
dedicated October 14, 2006.

Each steel box is double-walled, and the two-inch space between those walls is filled with Sorbothane, an elastic energy-absorbing polymer commonly found in the insoles of shoes. The balls are lead, with an outer coating of stainless steel. When wind sets the mid- and upper reaches of the spires swaying, the balls roll about, banging into the walls of their padded cells.

SORBOTHANE, INC.
2144 STATE ROUTE 59
KENT, OHIO 44240
330.678.9444 800.838.3906
www.sorbothane.com

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