 Quote by vanesch
That's apparently the conclusion. I learned something: I always thought that the towers were in concrete...
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To be clear the subsurface bases for these Belgium off shore towers, per the web site you provided, are prefabricated concrete with a steel tower atop the waves. So in essence the slab mass of the typical land based buried concrete foundation is still present in the form of these conical subsurface bases. In general wind towers world wide are almost all steel.