Patent ID: 8312828
Filing Date: 2012-11-20
Classification: B63B

Abstract:
1. A method of preloading a catamaran system to reduce loading and material on a topsides for an offshore structure, comprising: positioning a topsides having a weight between at least two float-over barges spaced apart from each other so that a center of the topsides is laterally disposed between the barges; adding a ballast to a portion of the barges disposed toward the center of the topsides to create a downward bias on the portion of the barges; coupling a bracing member between the topsides and each barge at the portion that is downwardly biased; transferring the topsides weight to the float-over barges; and adjusting the bias of the ballast to create an upward force from the barges through the bracing member to the topsides to reduce a sagging bending moment applied on the topsides that is caused by the weight of the topsides suspended between the float-over barges, the float-over barges supporting the topsides at least partially above a surface of water.