Surveys of the literature and members of the UK Offshore Operators Association (UKOOA) Structural Committee were conducted to obtain information, data, and specifications relevant to the design and construction of offshore helidecks. Limited but relevant data and specifications for steel helidecks have been secured. Loading specifications varied although that from HSE guidance and Civil Aviation Authority CAP 437 dominates application. Implicit in all current requirements is that steel will be the construction material. Even in two Classification Society requirements, and also in the proposed ISO Topside Structure Standard requirements that explicitly allow for the use of aluminium, the inherent structural configeration is that of a steel deck
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