The Crane Module


Although useful for modeling any rotating crane, the Crane Module is especially helpful for complicated, vessel-mounted cranes such as those having multiple hooks and for using crane capacity tables. It will produce reports showing the results of specified lifts, including data from a range of swing angles through a comprehensive wizard for specifying crane parameters and capacity tables.

Load Editor with Windows (LEw) works interactively with the Crane Module. When LEw employs the Crane Module, a crane input window appears within the main LEw window for input of hook load, azimuth and elevation angles and radius. A second window reports the crane response in terms of heel, trim, effective elevation, effective radius, and percentage of load capacity. These features can also be provided in a GLM (GHS Load Monitor for use on board a vessel).

Crane barge in LEw.
Crane ship

The Condition Graphics (CG) module adds display functionality to the Crane Module, showing current and rotated body, profile and plan views of the crane and vessel in the current relation to the waterplane. Plan view is shown with circle of the current crane radius

A primary benefit of the Crane Module is that it unlocks the Crane Wizard. The best way to learn about the Crane Wizard is to review the manual:
Crane manual

Note: If you are concerned only with ship stability, and 'simple' crane calculations, you do not need the Crane module. The BOOM command, which is always present in GHS and BHS, provides a convenient alternative to the ADD command for locating a hook load as well as boom and rotating structure weights.

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