A Crane has arrived!!
- Thread starter borc4cy
- Start date
It wasnt working for me the last couple times i tried this morning, as soon as you post, i try again, and it works. Figures.
One of you should post pics when the top structure is being lifted up onto the support legs. The webcam has rarely worked for me. I'm curious how they are going to do it and would love to see that huge thing hanging in the air over the Jake.
One of you should post pics when the top structure is being lifted up onto the support legs. The webcam has rarely worked for me. I'm curious how they are going to do it and would love to see that huge thing hanging in the air over the Jake.
I want to see the crane that is going to do it...
I think, especially after watching the video above, there are going to be a lot of nervous people watching..
Hopefully this doesn't happen to the Jake:
YouTube - RAW Crane Falls Crashes Drops Hot Tub Pool On House Roof Shoreview, Minnesota
Would give us a nice excuse to build something bigger and better in that endzone...
Do you think they would build the new football facility where the Jake is and build a tunnel to the Bregstrom?
Hopefully this doesn't happen to the Jake:
YouTube - RAW Crane Falls Crashes Drops Hot Tub Pool On House Roof Shoreview, Minnesota
Was that Howard Dean's house? Screams the same way.
Here are my thoughts...
Looking on Manitowac Crane's website, they have all-terrain mobile cranes and track cranes and every other sort of crane you can think of. I'm not sure if it will be an all-terrain mobile crane or a track crane but if I had to guess it would be two (2) all-terrain Grove GMK7550 cranes, the largest all-terrain crane made by them. One advantage is that these cranes can just drive to the site and they are all pretty much ready to go minus a few things where as a track crawler crane has to have the boom trucked in, the tracks trucked in, the counter-weights trucked in, and then assemble it all. With a stick length of over 130' (I think top of tower is 130') so it has to be longer than that given the angle. I'm not sure they'd even have the room next to the jake to put the boom together or even get the crane down there.
Anyways, looking at the GMK7550 crane (550 ton). Sounds like a lot but that can only be lifted at a certain boom extended distance and only 8' from the crane.
Looking at the crane charts for this specific crane the lifting capacity at 131.7' boom length and a distance from crane of 25' this crane can lift 254,000 pounds, obviously the further you get away from the crane distance wise, the less you can lift due to tipping. This is including 264,500 pounds of counterweights on the back of this crane. If the above comment (440,000 pounds total structure) is true, this is going to require two of these cranes to do a 2-crane pick. One crane on each side of the jake is what I would be thinking. For comparison's sake, if you extend the boom 147.6' the max weight one crane can lift is 50k pounds less at 204,000 pounds. Two of these cranes is still less than the 440,000 pound comment listed above.
This would be my guess to what happens in this case, if the distance is less than 130' than there is a possibility of two smaller cranes but still not even 1 of these would do it.
This should be a crazy pick come the 27th, wouldn't be surprised if this picture ended up in a construction crane magazine due to the crazy circumstances surrounding it (sloped walks on each side of jake, 440,000# lift, spanning the jake, span of the truss system, space limitations)
Edit: looking further down the crane charts, if you use the same crane with the megawinglift you can lift 298,000 pounds at 147.6 boom extension which would give 10-15 extra feet from tip to top of structure and be able to pick that much weight 25' from the crane radius.
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Assuming the weight is actually 440k I think you've pretty much got it nailed in terms of the general process. Does anybody in central Iowa even have a pair of 500 ton ATs? You don't see a lot of those running around. It'll be intersting to see where they come in from.
Assuming they set up between the towers and the video board's current location it'll be interesting (to put it mildly) to watch them maneuver that board to get it where it needs to go. The flagger and the operators will need their A game that day. A pair of crawlers in a pick and carry setup would probably be an easier pick but I doubt they are going to let them tear up the field this close to football season.
I do question if the video board support weighs 440k though. It's hard to tell from the webcam but the steel doesn't look like it's that big. I could be way wrong though. Maybe the 440k is all the structural steel on the job (towers + crossbeam)?
It is currently 9:45 on a friday night and I see at least 3 or 4 on the balcony. Not sure if they are workers or watchers but the north stadium lights are on and pointed toward the project for extra lighting. Are they already in catch up mode?
Good question, gotta wonder what theyre up to on a friday night at past 10pm. Cant tell if the ones on the balcony are working, but you see a few that definitely look like workers down there on the ground.
I also see another section of support on the ground on the east side of the Jake, i dont believe that was there when i last checked mid-afternoon. Guessing that's the final piece for the cross section
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I thought the middle section of the third level was brought in one piece. I could be wrong, but i thought i read that in a thread.
You are probably right. I just looked back at a screenshot from earlier today to see what it looked like and it certainly appears a whole section could be placed in there.
And that extra section, whether it be tower or the final crossbeam part, came sometime today... i think you can barely see its there in that picture you just linked, and its not there at the noon shot from today.
