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Old June 11th, 2012, 04:01 AM   #1041
Swiddle
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It probably went somewhere under the subway box. They'll bring in plenty more I'm sure.

It's neat seeing both cranes sliding now. Just think, not too long ago they were both above what is now the NE corner of the Memorial Plaza. Was either one used anywhere else on the WTC site prior to that?
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Old June 11th, 2012, 05:21 PM   #1042
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Both were used for the memorial, they were moved last summer
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Old June 11th, 2012, 05:50 PM   #1043
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Rib Base Columns

What I believe to be the last of the rib base columns was set this morning (June 11).

I remember the excitement here when DinoVabec noticed the first column late last February (see page 42).
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Old June 11th, 2012, 06:26 PM   #1044
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Quote:
Originally Posted by SidewalkSuper View Post
What I believe to be the last of the rib base columns was set this morning (June 11).

I remember the excitement here when DinoVabec noticed the first column late last February (see page 42).
True, this went up astonishingly fast! Hopefully they keep the pace!

Also good progress on the below-ground "railway-bridge" under Greenwich Street.
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Old June 11th, 2012, 11:50 PM   #1045
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Second Crane

Looking at the web cam today it appears that the latest crane that was just put in operation is already being disassembled (sections on the ground)? Can anybody shed some light on that?
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Old June 12th, 2012, 12:07 AM   #1046
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They're just lengthening its boom since it successfully placed the heaviest pieces. The same thing was done with the east crane.
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Old June 12th, 2012, 12:10 AM   #1047
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Yes, you can even see the three spare parts that had been put aside and are now lying close to the eastern crane.. there's still some work left for the two sliding cranes..
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Old June 12th, 2012, 12:29 AM   #1048
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Interesting that they would have to reconfigure the boom give that they can adjust the radius by just sliding the crane. Must have been a big pick
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Old June 12th, 2012, 04:37 PM   #1049
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It was a tandem pick to unload it, they even used the huge green teflon slings, when they use those you know its a heavy load







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Old June 12th, 2012, 04:40 PM   #1050
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Here's a pic I took of the green teflon slings I was taking about

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Old June 13th, 2012, 01:09 AM   #1051
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Quote:
Originally Posted by 325ccr View Post
Here's a pic I took of the green teflon slings I was taking about
Are you sure they are Teflon? Teflon by itself is extremely weak! It may be a Teflon coating on some other material to prevent abrasion but I'm sure that they're not just Teflon!
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Old June 13th, 2012, 01:12 AM   #1052
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My fault your right, they are kevlar
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Old June 13th, 2012, 03:43 PM   #1053
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nylons

kevlars are straps.

those are probably good for 80,000 a piece
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Old June 14th, 2012, 09:35 PM   #1054
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125 ton a piece they are good for, a friend of mine was a iron worker in the hub. (if anyone remembers Troy from rebuilding ground zero that's him) These are old pics but some good ones





Hard to see cause of the size but here's the 18000's hook block





Website for the slings
http://www.slingmax.com/index.htm


Tripping super column


62 ton box girder piece


And for the crane fans....

Adding more line to lift the super columns


Left is the load on the hook, right is the capacity. 0 tare because he's very close to the limit


Floating close to 1 million pounds


Good bye 18000!




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Old June 15th, 2012, 01:47 AM   #1055
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awesome pictures.


that is what we call a 'critical pick'
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Old June 15th, 2012, 04:48 PM   #1056
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Off topic question but one I've always wondered about. Do these big cranes have automatic cut offs that block the operator from trying to lift more than the crane can handle or from extending the boom so far that the boom would break or the crane potentially topple over? Or is it entirely up to the operator to monitor all those things and if he were inattentive he could in theory tip the crane over?
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Old June 15th, 2012, 05:04 PM   #1057
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Every new crane has an LMI (load motion indicator) which basically just measures the load, and tells the operator to stop lifting if the load is to heavy or he is out of radius.I do not think that there is some type of override to go over the suggested capacity.
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Old June 15th, 2012, 05:58 PM   #1058
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Whoa! Cranechat with 325ccr and friends. How did I miss this? Did you guys get any more info on that Tower 3 crane that was just put up?
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Old June 15th, 2012, 06:32 PM   #1059
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And also the cranes computers will automatically shut the rig down if it's over capacity, if you notice on the pic of the screen with all the numbers the operator set the "tare" (which is the weight of your load) to 0.... Notice how close the weight of the super column is to the capacity, it even made the Max-ER floar which is close to 1,000,000 pounds...

Here's some of the screens from a 440T M16000



You also have cameras (this is from a Liebherr working in Canada my buddy Laurent was running for Kiewit)



As for the T3 crane I really don't know, a lot of my contacts on site aren't there any more and a lot of what I say is just from past experience. It is ready to start making picks though

I will still be waiting anxiously for the large Favco's to arrive. Still don't understand why they would bring in them from oversea's instead of a local contractor with a crawler but it's there job not mine
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Old June 16th, 2012, 03:01 AM   #1060
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Photo by Joe Woolhead

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