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provides a strong, stable and lightweight leg structure that can
withstand wave and wind action.
A jack-up with columnar (fig. 1.2) or tubular
(fig. 1.3) legs is cheaper to manufacture than an open-truss
design, but it is less stable. A columnar platform is a liability in
extreme weather conditions and of little use in water deeper than
200 feet.
Figure 1.2 - Jack-up platform “Dyvi Epsilon” with columnar legs
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