Floating structures are provided. The floating structures are suitable for
use as floating runways for aircraft, floating roadways, and supports for other
facilities. The floating structures include a deck and one or more pontoons attached
to the deck. The pontoons, with the deck attached, are caused to float in water
contained in a basin, which in turn floats in a body of water. The basin provides
damping or isolation of forces due to currents in the body of water, or prevailing
winds, to reduce undesired or excessive motion of the deck. The deck supports are
preferably capable of limited lateral movement relative to the pontoons, thereby
permitting some movement of the pontoons independently and reducing stresses on
the structure.