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Hi there,



I looked at an offshore transhipment hub for an EC consultancy thingy and was quite surprised at just how long a well designed concrete offshore structure can last. DNV have classed the concrete structure of an LNG terminal as having an indefinite life, and Soviet & Russian experience with concrete floating docks (yes, several of them are concrete) have shown them to be exceptionally low maintenance compared to steel - and that pretty much translates to a longer life. We are probably talking about lives of well over a hundred years, if not more for some designs, so 1990-2040 is very short.



Maintenance is only needed if something breaks - and if concrete is artificial rock, so doesn't usually break on its' own. The module on top is another issue, of course.



RP1


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