Buoyant substructure for offshore platform

摘要

A buoyant substructure to float upright in water (e.g. for an offshore platform) and comprising at least three spaced apart columns [103] joined together in generally aligned relationship, in which at least one of the columns is adapted to be ballasted at its end [107] which is to float low down in the water, in which the columns are joined together by discrete cross members [111,113] which are widely spaced apart along the length of the columns, and in which the discrete cross members [111,113] have relatively small dimensions in the direction of alignment of the columns as compared with the total length of the columns.