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How on earth..........?

Community Veteran
Posts: 16,820
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Registered: 06-11-2007

How on earth..........?

Well, Sea, actually.... but that is not the saying....
How on earth, does this ship manage to stay upright.... ?


Looks like a chinese ship, so assume the crane was made in China, to keep costs down.....BUT ... why ship it as a complete unit, with the risk of losing it in a rough sea? Surely it would have been safer to ship it in smaller units and then fabricate "on site"...
6 REPLIES
Community Veteran
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Registered: 30-08-2007

Re: How on earth..........?

These are presumably freight container handling cranes (I guess) for delivery. All looks a bit ungainly though doesn't it. But it obviously made it here from China.
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nadger
Rising Star
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Registered: 13-04-2007

Re: How on earth..........?

Does look rather top heavy - there was something on news recently about new container port on Thames.
MJN
Aspiring Pro
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Registered: 26-08-2010

Re: How on earth..........?

It's down to the width of the ship - that thing must be nearing on 50m and so is inherently stable - combined with the fact that the cranes represent only a fraction of the mass of the ship itself so whilst they might 'look' massive the centre of gravity stays very low down because of the open frame structure. Surprising to many, but there won't actually be that much depth below the water line (that's not to say there isn't plenty of mass though).
alanb
Grafter
Posts: 459
Registered: 24-05-2007

Re: How on earth..........?

They take the risk of losing them at sea because they save a lot of money doing it this way!
There are several reasons for delivering them in a fully erected state. It reduces commissioning costs and time, and it minimizes the space required and disruption that could occur during assembly at the destination terminal. Bear in mind that, in this instance, much of the cost will have occurred in China and Chinese rates represent a significant cost saving even after paying for specialist transport, transport insurance, and up to a year of preparation and project planning for the delivery.
It does look top-heavy, but heavy-lift ships start with a very low centre of gravity, and they will have done calculations to ensure that the ship's centre of gravity remains low-enough after it is loaded. The the whole thing, ship plus cargo, will have been approved for seaworthy-ness by a marine surveyor acting for the insurance company before it is allowed to put out to sea.
If you want to see some similar pictures. Have a look at www.dockwise.com
Community Veteran
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Registered: 23-09-2010

Re: How on earth..........?

No matter how many times its explained as safe, looking at those pictures how many here would go to sea in that ship?
Just imagine how much worse it must look if your actually on the deck of that ship.
Community Veteran
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Registered: 12-08-2007

Re: How on earth..........?

Quote from: Petlew
These are presumably freight container handling cranes (I guess) for delivery. All looks a bit ungainly though doesn't it. But it obviously made it here from China.

You're right.  Built by one of the biggest crane manufacturers in the world.
Crane Builder