Marine Crane Foundaion
Marine Crane Foundaion
(OP)
Our group procureed a small knuckleboom marine crane for installation on a work boat. Load moment is 10 ton-meter, wt 1659 Kg, skewing torgue 24 Nm. The vessel is in the US. What procedures are used for designing the crane foundation on the boat? What codes are used and what verification are required? Do anyone have a design example or online links they can provide?





RE: Marine Crane Foundaion
RE: Marine Crane Foundaion
RE: Marine Crane Foundaion
Mike Halloran
Pembroke Pines, FL, USA
RE: Marine Crane Foundaion
For a starting point check out ASME.ANSI B30.8 Floating Cranes and Derricks. There is a general statement about the structural support of barges.
In my past employment in bridge construction, we used a lot of barge mounted cranes, but our cranes were either on wheels or tracts and we used mats or dunnage on which we positioned our cranes. Whenever we bought a second barge, we always got background info on the barge from the seller and occasionaly reinforced their internal steel bracing, so the seller may also be able to assist you.
Note, you'll need a revised load chart, on board, for the crane to be used over water.
RE: Marine Crane Foundaion
a) assuming that your cranemoment includes all duty and hoisting factors apply 50% of the yield stress of the pedestal as criterium
b) ensure that the pedestal penetrates the deck and stop it either at the bottom or at the next deck under the maindeck .You may need to fir a shear plate to absorb the vertical loads.
c)if you want to stop the pedestal at the deck ensure to fit sufficient substantial girders and transverse underneath the deck to absorb the crane loadings.
Femarie
Ship surveyor to LR