Patent ID: 6347909
Filing Date: 2002-02-19
Classification: B63B,E02B

Abstract:
A method for transporting a deck at sea and installing the deck on an offshore substructure, comprising the steps of:a. constructing the deck on a set of girders; b. placing the deck and girders on at least two floating pontoons; c. installing stability columns on the pontoons; d. installing lifting towers on the pontoons, said lifting towers including means engaged with the girders for selectively lifting and lowering the deck and girders; e. installing removable bracing between the deck and pontoons; f. towing the pontoons and deck to a selected offshore site, wherein the pontoons are at the maximum water plane area; g. removing the bracing between the deck and pontoons; h. lifting the deck to a height that allows the deck to be moved over a substructure; i. moving the deck over the substructure; and j. lowering the deck into contact with the substructure.