These are notes that I am writing to help me learn our industrial history. They are my best understanding, but that does not mean they are a correct understanding.
Wednesday, December 9, 2015
Telescoping Boom (Hydraulic) Cranes
Update: video of a crane recovery. It took two cranes, a big tow truck, and a bucket truck to set the crane upright again. Most crane lifts make it look easy. Starting at -2:19, this video reminds one that things can go bad. And it does show that the joints in the boom are a weak link. (Earlier in the video, it demonstrates why you want a roll bar or strong cab on a tractor.)
Telescoping booms have become a common design for cranes mounted on a truck because the boom can quickly and easily be extended to work and then retracted to move on. It appears this truck has five segments.
Bolk Transport BV posting Photo's by Mike Kiely (Celtic Shipping) and René van den Berg.
I'm finding it rare to find pictures of tall booms. One reason the crashed crane photo was so neat is because the boom was horizontal and it easily fit into a photo :-) Another reason is that it demonstrates that these booms will bend before they break.
I'm assuming that Mac Mackay took these photos for publicity purposes and that their use is desired.
I believe this boom has seven segments. When asked for the details of the shipment, John added:
This particular unit, which arrived by ship last week, belongs to Gruas Kirten of Soria, Spain, and is apparently a rental for use somewhere in western Canada. and appears to be a AC 250.1 model (250 ton, 300 US ton) capacity, with the 80 meter boom and 12x8x10 drive train.
Liebherr by railCN delivered this large Liebherr to Halifax from AllCanada Crane in Mississauga.
Notice the trailer under the boom to help spread the load across more tires to reduce the impact on highways.
Grove, another 7-segment all-terrain mobile crane.
Brandon Mihal posted
Thought you guys might like this video I took while troubleshooting a pinning issue on a newer GMK3060 today.
Telescoping booms are also built to be mounted on ships so that they can unload themselves. Note that three hydraulic rams are used to raise this boom. Normally you see just one or two. If you follow the picture's link and scroll down, you will see load charts. As expected, it can raise a heavier load with the boom extended and upright. As the boom becomes more horizontal, the reach from the ship goes up, but the twisting moment on the crane reduces the weight it can hold.
They have been replacing the signalling bridges along the BNSF tracks in the Chicago area to implement Positive Train Control. I zoomed in on the crane part of a couple of Jim's pictures. Jim explained "The new signal bridge at West Eola went up today...here are some photos I took while the crew was raising the horizontal portion:"
An 8-axle mobile crane is the biggest we have seen so far, but they are using the rear winch on several dozers instead to raise the locomotive. Is the crane going to be used when the rear of the locomotive is at the top of the cliff to raise the cab end over the concrete retaining wall?
One of three in Samuel Stokes posting Caught this load rolling through Folkston,GA last year. Combine trains and cranes, and I'm in heaven. [Note the truss boom that can be used to extend the reach for lighter loads.
John W. Coke shared the three pictures from Amad Akhras's post. His comment: "When the load will not pass under the bridge, lift load over the bridge and continue."
This is the first 9-axle crane I have seen. But even nine is not enough. The comments imply that because the soil is wet in the Spring, the axle loading weight is reduced. (Mud is a more extreme example of wet soil not being able to hold as much weight as dry soil.) So they add more axles to reduce the weight carried by an axle.
Josh Davis posted Building 167 W Erie [That struck me as a long boom for a truck with just three axles.]
Karole R Sorensen posted The grain elevator company went out of business. Another company bought the bins and had them moved about 4 miles North. Tremonton, Utah 8.19.2004
A video of cranes and transporters turning a boat right-side up.
Milwaukee 261 steaming east out of Clyde Yard (Cicero, IL.) passing under the old Ogden Ave. overpass as it's being removed.
One advantage of railfan pictures is that sometimes they catch something besides a locomotive. I'm glad Ron mentioned the Ogden Ave. overpass removal.
I wondered why one of the four cranes was a truss crane. Then it occurred to me that the truss crane is probably the crane that has been on the job for months removing the smaller members. Then they brought in three mobile cranes to help remove the two side trusses. Evidently the "partner" of the truss crane is going to extend its boom in order to lay the eastern bridge truss down on the left side of the tracks. Or maybe they will just hold that truss in place until the western truss is down and one of those bigger cranes can get the south side of the eastern truss and move it to the side of the track. Actually, I'm trying to figure out why they needed to lift both bridge trusses at the same time. If they lifted one truss at a time, then only one mobile crane would have been needed.
I am surprised they are running trains under a load suspended by cranes. I'm sure the BNSF safety office would stop the trains now while something was hanging over the tracks.
John W. Coke posted The Most Powerful Mobile Crane in the World… and actually a monster of a truck. Meet Liebherr LTM 11200-9.1 – Built by the German company Liebherr Group, this colossal mobile crane has the longest telescopic boom in the world – 100 meters (328 ft)! Dennis DeBrulerThanks for the confirmation that this 9-axle crane is the worlds largest.
I assume this 9-axle crane with a separate boom is also a LTM 11200 9.1.
John W. Coke posted Steve James That hairpin bend is on the climb out of berriedale brae in Scotland. One chance only to get it right. Get it wrong you’ve had it. What that pic doesn’t show is the short but steeper climb and the blind summit where other traffic coming towards you😁. Steve JamesJamar Cvb Lewis..what you don’t see there is a 1in10 down hill a sharp left then hairpin no 1 then the one in the hairpin in the picture followed by the short incline and the blind summit. Caught me outa couple of times. Best way up it is select 1st or 2nd at the bottom and stay in it. Sean Huber The camber of the pavement must be playing hell with the chassis. Suspension can only absorb so much.
Tony Snoke posted, cropped
Same job 3 years apart. Guess the cranes and configurations? Scott TiptonOn the left Grove gmk 6300, on the right grove gmk 7550. [It must be lifting a light load with a reach that long. In another posting, he indicated it was an electric motor.]
Louie Dee posted three pictures with the comment: "She's all out."
I wish Louie indicated the make and model. The first thing I noticed in the first picture was the bend in the boom. So did a comment: Clay ViceLook at the bow or bend in the boom, got to be good American Steel.
Ben Stalvey shared
One nice mega wing from JJ Curran Crane
JJ Curran Crane Company posted
Picking 68,000 lbs. with one of our workhorses. We engineer our lifts with safety as the top priority. We take pride in getting the right personnel and equipment on the job. Edward JacobsOver the front tooDavid ParsellLooks like at zug island
JJ Curran Crane Company posted two photos with the comment:
Dennis DeBruler posted two photos with the comment:
Across the tollway from where I parked to watch the MLC300 work was a Grove owned by L J Keefe. It and two excavators were laying pipe. At one time when I looked over to see what it was doing, it had a section of pipe hanging from the hook. But in these photos I see two cables coming from a bracket at the end of the yellow segment. What would be the purpose of those cables? I might make another trip and swing over to County Line Road, https://www.google.com/…/@41.9264868,-87.9206…/data=!3m1!1e3
Cody Lane Hannah Could be attached to an clam bucket. Those two cable coming off the yellow section is what would control the opening and closing of the bucket. Kevin Mitchell I d say as above... hydraulic grab/clamshell... so only one hoist rope required instead of normal two ropes.. one normally a holding rope for open/empty grab.. 2 nd rope closes and lifts full grab.. hydraulic system does away with one line of hoist rope n uses cranes hydraulic system to open n close grab.. in pic looks like they affixed main hook to aux line to stop main block swinging about and wrapping around auxiliary line.. hope this sounds clear to ya Dennis DeBruler Thanks. Hydraulic hoses to an attachment makes a lot of sense. Obviously, a "juice crane" has a lot of hydraulic power. And modern hydraulic circuits need two hoses. I suspect the attachment is some sort of "tongs" instead of a clam bucket. Tongs would simplify picking up and releasing pipe segments. The site has two excavators to dig and cover the trench. Since this is by Addison Creek, I this construction is some sort of storm water project. And thanks for explaining why the main block looked like it was attached to the hoist line. I was wondering about that also.
A video of a solution to getting smaller loads higher. The boom can be longer than a crane because it stays almost vertical when it has a load and because it looks like it is resting against the building when it is carrying a load.
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