Stackability of shipping containers...?

Jonathan Bright · 12th October 2011, 10:40 PM

There is a container-ship in trouble off the NZ coast and it has at least seven layers of containers stacked vertically on its deck. I have occasionally wondered just how many of these boxes can be safely stacked? I understand that these are filled i.e. heavier than empty ones. Totally trivial I know. Just curious. Anyone got any idea?

Jonathan

aardvarkash10 · 12th October 2011, 11:31 PM

specified on the container. Depends on the weight (full or empty). Google "Intermodal Container"

jacco vermeulen · 11:45 PM

Used to be 7 full, 9 empty for a TEU.
(not sure how many empties are allowed to be stacked in the latest generation containerships)

Jonathan Bright · 12th October 2011, 11:52 PM

Thanks Guys: appreciated.
Jonathan

jacco vermeulen · 12:06 AM

No problem.

The number depends on the weight, (wind) gale force and rolling of the vessel, it's basically the twist locks that determine the max stack number.
Later generation container vessels have cell guide rails sticking out above the deck, translates to a higher location twist lock which encounters the highest load. (the 9 empty is for restricted areas/conditions)

Sea containers can be stacked higher on land (no movement, you know), up to 12 high.

DF96 · 13th October 2011, 11:21 AM

Quote:

Sea containers can be stacked higher on land (no movement, you know)

Some people in Japan and Christchurch might beg to differ!

The thing about container ships which looks strange to me is that they seem very top-heavy. I assume there is a lot of concrete (or depleted uranium?) in the keel.

jacco vermeulen · 11:38 AM

Fuel (HFO) or ballast water.
Stability of container vessels is not such an issue (due to weight), a loaded TEU still is relatively light at <30lbs/ft³
Stacking them in an optimal sequence/spread, and keep in line with stability criteria, is trickier. (couple of my class mates graduated on development of container loading/unloading software)

DF96 · 13th October 2011, 01:05 PM

Yes, of course, I forgot about ballast water. That is what propagates alien marine species around the world into new ecosystems where they have no predators. After all, water is just water, isn't it?

PeteMcK · 14th October 2011, 01:33 AM

now that's what I call stackablility....

TheBaronGroog · 18th October 2011, 04:48 PM

Quote:

Originally Posted by PeteMcK

now that's what I call stackablility....

I like your sig, one of my favourite quotes is also water/fish related:

"I don't drink water, fishes F$%K in it" Oscar Wilde, when asked if he wanted water in his whisky

12th October 2011, 10:40 PM	#1
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	Stackability of shipping containers...? There is a container-ship in trouble off the NZ coast and it has at least seven layers of containers stacked vertically on its deck. I have occasionally wondered just how many of these boxes can be safely stacked? I understand that these are filled i.e. heavier than empty ones. Totally trivial I know. Just curious. Anyone got any idea? Jonathan __________________ "It was the Spring time of the year when aunt calls to aunt like mastodons across the frozen waste." P.G. Wodehouse.

12th October 2011, 11:31 PM	#2
aardvarkash10 diyAudio Member Join Date: Mar 2007 Location: Auckland, NZ	specified on the container. Depends on the weight (full or empty). Google "Intermodal Container" __________________ Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012

12th October 2011, 11:41 PM	#3
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Used to be 7 full, 9 empty for a TEU. (not sure how many empties are allowed to be stacked in the latest generation containerships) __________________ Looks like Sponge Bob has killed another thread. Last edited by jacco vermeulen; 12th October 2011 at 11:45 PM.

12th October 2011, 11:52 PM	#4
Jonathan Bright diyAudio Member Join Date: Feb 2004 Location: Queensland	Thanks Guys: appreciated. Jonathan __________________ "It was the Spring time of the year when aunt calls to aunt like mastodons across the frozen waste." P.G. Wodehouse.

13th October 2011, 12:03 AM	#5
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	No problem. The number depends on the weight, (wind) gale force and rolling of the vessel, it's basically the twist locks that determine the max stack number. Later generation container vessels have cell guide rails sticking out above the deck, translates to a higher location twist lock which encounters the highest load. (the 9 empty is for restricted areas/conditions) Sea containers can be stacked higher on land (no movement, you know), up to 12 high. __________________ Looks like Sponge Bob has killed another thread. Last edited by jacco vermeulen; 13th October 2011 at 12:06 AM.


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13th October 2011, 11:32 AM	#7
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Fuel (HFO) or ballast water. Stability of container vessels is not such an issue (due to weight), a loaded TEU still is relatively light at <30lbs/ft³ Stacking them in an optimal sequence/spread, and keep in line with stability criteria, is trickier. (couple of my class mates graduated on development of container loading/unloading software) __________________ Looks like Sponge Bob has killed another thread. Last edited by jacco vermeulen; 13th October 2011 at 11:38 AM.

13th October 2011, 01:05 PM	#8
DF96 diyAudio Member Join Date: May 2007	Yes, of course, I forgot about ballast water. That is what propagates alien marine species around the world into new ecosystems where they have no predators. After all, water is just water, isn't it?

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