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Crane Tipping Moment - SWL vs Radius

Safe working load at a given radius for a jib crane with triangular stability limit - SWL × radius = constant overturning moment.

CraneSWLTipping
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Formula, assumptions, and limits

SWL(r)=SWLmaxrminrSWL(r) = \frac{SWL_{max} \cdot r_{min}}{r}
SymbolMeaningUnit
SWLSWLSafe working loadt
rrLift radius (jib pin to hook)m

Source: DNV-ST-0378

In short

Safe working load at a given radius for a jib crane with triangular stability limit - SWL \u00d7 radius = constant overturning moment.

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