Patent ID: 7503728

Claim:
A floating support designed to support structures designed to be connected to the sea floor of a given site, the floating support including a working deck and floatation members which support the working deck, wherein the spacing between the vertical axes passing through the centre of buoyancy of the floatation members is such that, for each swell propagation direction, when the swell period is equal, within 20%, to the 100-year storm surge period associated with the propagation direction under consideration, the 100-year storm surge being the swell of which the yearly probability of being encountered at the site where the support is intended to be installed is 1/100, the sum of the moments, taken in relation to the horizontal axis perpendicular to the propagation direction under consideration and passing through the centre of gravity of the support, of the vertical excitation forces of the swell on the floatation members situated on one side of the vertical plane passing through this horizontal axis, is equal to the corresponding sum associated with the floatation members situated on the other side of this vertical plane, this period being referred to as the attenuation period according to the swell propagation direction.