No Limit reached limit

[Dutch Peter]

Anybody know what happened here?!
(see pics)

[senior31refit]

Might be completely wrong here, but was it launched by an imbecile and due to high forces on launch it broke its back?

[Dutch Peter]

No! This was the third trip since launch, half laiden with wet sand, in the lock!

[senior31refit]

So you know what happened to it then!?!?! Why was it shipping sand?

[Dutch Peter]

Common practice in Holland, we need that for building roads, houses, more Holland etc.

Yes, I know what was wrong. Just letting you pick your brain. Any other bright ideas?

[senior31refit]

Well wet sand is a whole lot heaveir than dry sand, maybe it got wet.....

[Dutch Peter]

No, these vessels are normally designed to carry wet sand in their holds up to the top of the coaming!! The coaming becoming part of the freeboard and the vessels sailing with their deck at water level! And this one was only partly filled.

[SailDesign]

That's what happens when you unload the ends without lightening the mid-holds.

[jehardiman]

Without an inboard and midships structural plan one can only conjecture. Last photo seems to show that she buckled the hull panel between deep frames rather than fail the hull girder. This would be indictive of a loss of section shape (due to damage or deflection) or insufficient panel end ridigity in Euler buckling. If new and sound I would go take a very close look at the hull bending analysis and any FEA done for loading conditions. This may be a simple element mistake.

[sorenfdk]

An elephant escaped from the zoo and jumped on board to hitch a ride?

[dougfrolich]

Looks like the middle was heavier than the ends!!--Like ore boats of the great lakes, way toooooo long for thier width and depth, for my taste

[Dutch Peter]

The solution:

Original design was 86 mtrs, the one in the pictures is 110 mtrs.
The skipper wanted some more roomfor him and his mate.
The analysis afterwards revealed that the boat had only 20% of the longitudinal stiffening it needed.
Somewhere a limit was reached!

[MikeJohns]

So it was the elephant that broke the last straw.


Don't you guys over there in Dutch land have a survey rerquirement for commercial shipping? Thought you were in the EU now?

[Dutch Peter]

Originally Posted by MikeJohns

So it was the elephant that broke the last straw.


Don't you guys over there in Dutch land have a survey rerquirement for commercial shipping? Thought you were in the EU now?

As I understand it, this vessel's structure has been appraised by Netherlands Shipping Inspectorate, but they waived any responsibility. It's not required to be a classed vessel!

[mmd]

That looks expensive. Good thing its in the land of the heavy-lift ship.