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Old September 30th, 2010, 02:19 AM   #1741
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Quote:
Originally Posted by saeed View Post
almost Topped out
I think no:

image hosted on flickr
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Old September 30th, 2010, 02:27 AM   #1742
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I really hope the top isn't hollowed out like that. I'd rather it was filled in to hide any and all the mechanical equipment. Or could be for aerodynamic reasons (wind resistance, etc).

Either way, I hope it will be cladded all the way up.
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Old October 12th, 2010, 01:59 AM   #1743
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Bad detail: the boom of the taller crane is hanging down and twisted... there must've been an accident!

10/10/10 by 234sale:

[IMG]http://i55.************/24fd7r6.jpg[/IMG]

[IMG]http://i55.************/33uu5p1.jpg[/IMG]
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Old October 12th, 2010, 04:09 AM   #1744
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Wow. I wonder what happened? I guess it wasn't supported well enough or something.
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Old October 12th, 2010, 04:15 AM   #1745
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This has a way to go
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Old October 12th, 2010, 09:42 AM   #1746
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So again a major accident after the flooding years ago.

I hope this isn't a big problem and the finishing will continu...
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Old October 12th, 2010, 06:20 PM   #1747
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looks like they tried to remove this crane and then the accident happend...
so that's the reason why the floors have stopped rising?
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Old October 13th, 2010, 01:25 PM   #1748
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The crane has been repared (or the service has been completed, if that what was happening). As of now it is up and running.
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Old October 13th, 2010, 06:13 PM   #1749
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Quote:
Originally Posted by DennisS View Post
So again a major accident after the flooding years ago.

I hope this isn't a big problem and the finishing will continu...
How do you define a major accident? Money, injury or loss of life? To my knowledge no one has been hurt in any of the major accidents you refer to.

I doubt there has been any loss of life on this project, Arabtec are very proactive in respect to safety. This could be something trivial or possibly a safety load test failure. From my limited knowledge of LOLER lifting regulations in the UK, it is mandatory that a crane is overloaded regularly in controlled circumstances to check the safe operation of the crane. It can be operator error to forget to factor the test weight against the amount of cable suspended by the crane as all test weights must not be lifted higher than needed. If you follow me, you will understand that as the crane reaches maximum working height it must pay out more cable to reach the ground. Add the weight of the cable to the test load and the weight lifted is now right on the limit of safe operation. The same happened with Almas tower right at the top of it's working height.

Many years ago in London a crane was being tested under these conditions and the operator lifted the load over a nearby building as the crane failed. The crane collapsed killing the operator. Regulations now prohibit test loads being lifted above a certain height that would cause the crane to completely collapse.

This assumes that the above is a failure or accident.
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Old October 13th, 2010, 08:38 PM   #1750
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I don't know the definition of a major accident, that's a fact. But I can imagine that if there are ('big') risks of damage to the building or any kind of injuries, even small injuries, you can call it a major accident.

If something like a huge crane collapses at 300 meters height on top of a almost finished structure, where other people can walk under it on the structure or on the ground in the surroundings or even in buildings next to Infinity Tower, I think this is really a major accident!!!

And they will of course never ever do something like a 'safety load test' at this stage at that place! There are so many big risks during such a test. Everything must be calculated in an early stage, even with the extra loads and extra windforce and everything else. This kind of things happened in The Netherlands also, and if a crane collapses, it happens that a project is being put on hold until a big research is done(Sometimes for months!). I guess (and hope) this isn't really the case in Dubai however..
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Old October 13th, 2010, 11:50 PM   #1751
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You are unecessarily overdramatising everything. Anyway, as I said the crane is up and running again so nothing serious here.
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Old October 14th, 2010, 11:26 AM   #1752
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I'm just telling how people from Holland think about it and would act when such accidents happen. Maybe to you it is overdramatising, fine.

If it already is up and running again then in Dubai they are really thinking and acting different than here, but that's no problem, I'm just like you glad to hear they're working again.
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Old October 14th, 2010, 01:45 PM   #1753
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You are doing it again.

Who told you it was an accident? Maybe it was a simple maintanance job, maybe one of the cables stabilising the boom needed to be replaced.
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Old October 14th, 2010, 02:02 PM   #1754
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I assume it was an accident because the boom appears to be bent and twisted (before the lowest cabin) as if it failed to lift something up and is fallen down because of that.

If that's not the case I'll take everything I said back of course, but this is my interpretation of what I see.

And AltinD, please don't react so irritated, I'm just trying to discuss what we can see at the pics and imo that should be the purpose of this forum.
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Old October 14th, 2010, 02:10 PM   #1755
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Crane accidents are quite common. In NYC two years ago there were quite a few and a couple were far worse than this. If that happened here, it would delay progress a bit but I doubt there's any serious damage to the tower, at least from the angle shown.

Here's a 'before' shot posted Sept 16:

[IMG]http://i52.************/296on5g.jpg[/IMG]

It appears something did happen...
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Old October 14th, 2010, 03:41 PM   #1756
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I think most people outside of heavy construction would be quite justified in being concerned about a crane failure. HOWEVER, most failures are under carefully controlled tests. It's a simple pass or fail test where the crane is subjected to a load far beyond what it is required/calibrated to lift under normal working conditions. Failure of the jib would just result in buckling of the jib section which would then need repaired and retested. Perhaps with a subsequent derating of the lifting capacity this time.

Just to drive the point home, it is a controlled test and no one is likely to get hurt due to proper methodology and risk management. This is what makes construction safer today as it removes the risk of a crane failing with a load suspended 200 metres above ground which would be a major accident.

Remember the car manufacturers regularly test cars to destruction in the pursuit of safety and no one throws their arms up in horror.
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Old October 14th, 2010, 04:52 PM   #1757
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You would not "test" a crane on a 300 metre high building site.
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Old October 14th, 2010, 04:55 PM   #1758
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uhm, ugly!
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Old October 14th, 2010, 07:47 PM   #1759
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Quote:
Originally Posted by jhalsey View Post
You would not "test" a crane on a 300 metre high building site.
That is the same as saying you would not test an Airbus A380 at 40,000ft.

Testing is time related not location related. Regular tests and thorough inspections are LAW!
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Old October 15th, 2010, 08:01 AM   #1760
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I did a model of this tower!





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