A method of providing a buoyant concrete support structure 10 for an offshore installation, such as a wind turbine. A monolithic multicellular concrete member 11 is formed with at least five cells 14 arranged circumferentially around a central vertical longitudinal axis 20. The diameter of each cell 14 is smaller than a diameter of a circumference along which the cells 14 are arranged. The cells 14 are formed as vertically-extending hollow elements with an enclosed bottom portion provided below a hollow central void 15 thereabove. The cells 14 are formed contemporaneously such that all of the cells 14 are integrally-formed with each other in unison to provide the seamless monolithic multicellular concrete member 11. The cells 14 are coherent such that each cell 14 shares a common wall portion 40 with an adjacent cell 14.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.