# Dumb Pontoon Barge Stability

Discussion in 'Boat Design' started by Tevita Lauvili, Dec 8, 2014.

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### Tevita LauviliJunior Member

Need Help with the Stability calculations

Is a dumb pontoon barge of length 6m x beam 2m x height 1.6m with a draft of 0.2m and weighs approximately 2.4 tonnes stable having a metacentre of 16.67m...????

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### Ad HocNaval Architect

I think you have your numbers wrong by a simple decimal place, i.e power of 10.

The BM = 1.66m.
Since a box the KB = 0.1m
Therefore your KM = 1.76m.
So where is your KG?

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### WindRafSenior Member

Transverse metacentric height : 1.767 [m]
Longitudinal metacentric height : 15.099 [m]

is stable, if you put weights inside, if you put weights only top flips

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### TANSLSenior Member

To give a more accurate figure should be taken into account if we are talking about fresh water or seawater.

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### Tevita LauviliJunior Member

What are you trying to say WINDRAF...??

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### TANSLSenior Member

The center of gravity of the weights placed on deck could be above the transverse metacenter.

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### WindRafSenior Member

exactly

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### WindRafSenior Member

means that with the weight only on the top, when the barycentres coincide (and in your project are very close) , the pontoon capsize.

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