Yes, it is hard to believe where technology is nowadays. Though, you have to admit that the J-lay tower which the cranes are lifting doesn't really look like something that weighs under 1800 tonnes...
I don't think it will take long before you'll see cranes with a liftingcapacity of 1000 tonnes each.
What exactly does an 1800 ton hollow steel structure look like? I've worked years in bulk and general stevedoring and I've never seen anything lifted that's even close to half that weight. We do heavy tandem lifts with deck and Liebherr Mobile Harbour cranes all the time, but this mind blowing. It's obviously in time-lapse. How long did the lift take? I'm guessing it took a while. The ship must have been pumping ballast flat-out. Obviously no ordinary break-bulk carrier. Awesome!
The lift took over 6 hours, that's without hooking the piece on/off. Of course the pressure and all the commotion about this project (being a world record) made the lift go a bit more conscientious and therefore slower.
I think they used all three of the (HUGE) ballast pumps and stability pontoons to make it.
No, from a distance it looks like the vessel is hitting the quayside. When a heavy lift ship is loading/discharging with the cranes on one side, here on port side, the ballast water is pumped over to the other side.
This is not only to improve the ship's stability, but also as a contra-weight: if something would happen to the cargo --like a breaking wire- the vessel wouldn't "bounce" to the other side and hit the quay. Then, when the cranes are turning inside, the water is pumped back again. So what you see is just correcting/controlling the ship's list by using ballast water.
looks like a giant microscope! :)
bent540 1 year ago
180 tonnes maybe.
calzoid71 3 years ago
I take that back--they are no ordinary deck cranes, but 1800 tons, man that's hard to fathom. I do find that hard to believe.
calzoid71 3 years ago
Yes, it is hard to believe where technology is nowadays. Though, you have to admit that the J-lay tower which the cranes are lifting doesn't really look like something that weighs under 1800 tonnes...
I don't think it will take long before you'll see cranes with a liftingcapacity of 1000 tonnes each.
pietkippenkont 3 years ago
What exactly does an 1800 ton hollow steel structure look like? I've worked years in bulk and general stevedoring and I've never seen anything lifted that's even close to half that weight. We do heavy tandem lifts with deck and Liebherr Mobile Harbour cranes all the time, but this mind blowing. It's obviously in time-lapse. How long did the lift take? I'm guessing it took a while. The ship must have been pumping ballast flat-out. Obviously no ordinary break-bulk carrier. Awesome!
calzoid71 3 years ago
The lift took over 6 hours, that's without hooking the piece on/off. Of course the pressure and all the commotion about this project (being a world record) made the lift go a bit more conscientious and therefore slower.
I think they used all three of the (HUGE) ballast pumps and stability pontoons to make it.
pietkippenkont 3 years ago
There are allready cranes above 1000t each. Search for the following at google:
* Saipem 7000 (which has 2x 7000ton cranes)
* Thialf of Heerema has even bigger (2x 7100ton) and is the largest.
* Sapura 3000 (which has a 2700 metric ton crane) has no counter weight like the ones above.
The cranes in the movie were originally 800t and were upgraded to 900t just for this lift.
ShaiHuludArrakis 3 years ago
It's 1800 tonnes for real. I was a 2nd engineer during that trip. So believe it or not, being stevedoor doesn't mean you know it all.
Joris106 2 years ago
Comment removed
calzoid71 2 years ago
Funny to see the results of my work here. :)
It is still a great movie. I like the crane at the background racing from right to left.
ShaiHuludArrakis 3 years ago
good
pietvoort 3 years ago
Thanks for the explanation. Now I know how it works.
AmtrakSilverStar 3 years ago
Is that the vessel rocking each time the cranes move?
AmtrakSilverStar 3 years ago
No, from a distance it looks like the vessel is hitting the quayside. When a heavy lift ship is loading/discharging with the cranes on one side, here on port side, the ballast water is pumped over to the other side.
pietkippenkont 3 years ago
This is not only to improve the ship's stability, but also as a contra-weight: if something would happen to the cargo --like a breaking wire- the vessel wouldn't "bounce" to the other side and hit the quay. Then, when the cranes are turning inside, the water is pumped back again. So what you see is just correcting/controlling the ship's list by using ballast water.
pietkippenkont 3 years ago