The present invention relates to a semi-submersible platform body for supporting drilling, storing, treatment or production of hydrocarbons. The platform body have a cross section with a center point in a first plane, and is defined by a side wall formed by at least one side wall section, the side wall is arranged around the periphery of an open recess. Each side wall section comprises a first and a second side, an upper and a lower edge, the first and second side of the side wall section defines at least a first side wall thickness. The first side of the side wall section faces away from the open recess and the second side of the side wall section faces towards the open recess. The mentioned open recess has a cross section with a center point in the first plane. Further is the center point of the cross section of the open recess displaced a distance in the first plane, from the center point of the cross section of the platform body. The present invention provides for a flexible and versatile platform body which is disposed of the need for custom applications of heavy equipment or facilities in order to prevent displacement of the center of buoyancy.