Eero Saarinen's Model of the Gateway Arch

Origin
Eero Saarinen was an architect whose works followed a futuristic design style. His most famous creations include the St. Louis Gateway Arch and the TWA Flight Center at JFK International Airport. Planned as a monument to westwards American expansion, the world’s tallest arch was built upon the banks of the Mississippi River. The arch’s shape is that of a inverted catenary, a curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends.

Effects
The model causes free-hanging structures such as wires, cables, building supports, overhangs and balconies to become perfectly catenary curves. It will force the structure and anything attached to it to reform internally, which can cause severe imbalance and liability to collapse or topple when disturbed.