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For the operator, predicting foundation behavior is crucial to understanding the risks associated with placing a jackup rig at a designated location. For independent leg jackup rigs, this is even more important, as the legs serve as the foundation for the rig on location. To confirm a suitable foundation, the base of each leg is fitted with a spud can, a plate or cone designed to transfer the vertical loads into the seabed to the point of refusal by means of preloading. Spud cans are can be circular, square or polygonal, and they vary in size. The largest spud can being used, to date, is more than 20 m wide.
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