With continuous development in the Oil&Gas industry, there is an increase of transports of heavier and bigger structures. As these transports tends to reach the structural limits of heavy transport vessels there is a growing demand to perform more detailed transport analyses. The paper addresses developments in heavy transport design calculations from a theoretical and an operational perspective. Both view-points contribute to a more detailed analysis of the transports and increase the safety level. Theoretical developments of design calculations are achieved by means of a so-called "Global Hull Analysis". An integrated finite element model of the transport vessel and cargo ensures that the stiffness interaction between both is accurately represented. Hydrodynamic analysis -combined with the "design wave approach" - is performed to determine critical load cases, containing hull pressures and accelerations. These load cases are input for structural analysis to determine stresses in and support loads between cargo and heavy transport vessel.
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