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| From Facebook [Actually, I don't see much bend in this one.] |
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| Leon Stravers posted Mike Dicenzo  Have you ever seen one heated from one side by the sun and it curves sideways ? Look's really bad !!McKenzie K Andrew Pretty typical in a grove Anthony Cammack Or a liebherr, or a Demag, or pretty much all longer hyd. Pinning booms- McKenzie K Andrew Anthony Cammack grove is by far more deflective than the others you mentioned |
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| Butch Gray commented on Leon's post Every day occurance |
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| Brad Young commented on Leon's post Yep they flex |
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| Kevin Mitchell posted Grove 6300L Kevin Mitchell posted My old 300 grove doing what it does best. 74.5 m boom ... 12.5 ton ... I just let the hook off to see what deflection was in it... 8.5 m further in radius than where I set lump down. |
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| Chris Mayfield posted A little 6300L action this morning. |
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| Leon Stravers posted Annual testing day. Michael E Treece Sr. It’s about to fail !! |
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| Heath Laxton commented on Leon's post You should look into upgrading the blocks on top of the boom to the roller option. |
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| Leon commented on his post Heath Laxton it is rollers. |
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| Grove by Manitowoc posted See the new Grove GMK6300L-1 being put to the ultimate test in Singapore with full boom extended to 80m, picking up load at a maximum radius of 74m. And this is why the Grove 300t all-terrain crane is still every crane owner’s preferred choice in this class. Including the owner Tiong Woon Crane and Transport, who purchased the first of this model in Singapore. The Grove GMK6300L-1 has already been deployed at oil & gas and construction jobs. |
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| Jared Marcotte posted Puttin' in work with out GMK 5250L.. Cosme Perez When the booms first started doing that, it took me a little bit to get used to it. Had a little 50 ton terex with the jib and stinger grabbing a welding machine at max radius and made me feel sick. Lol Jack Lee Drye Jr. Trex are only good for 5 years. I ran a bunch of there prototypes back in the 90s when they bought out American, P&H aka poor n helpless and Lorain. They are fun to run especially 60 ton it was fast. Still like Groves much better crane. Gary Keller Will the boom buckel before the crane gets light ? Mark Shumaker Many times. Mark Quinn Working 184’ or 219’ of boom length ? How much weight is proof load? Just curious? Jared Marcotte Mark Quinn this is 300' of boom, 245' radius with 2500 lbs. |
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| 1 of 4 photos posted by LiebherrConstruction |
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| One of five photos posted by James Touhy 6300L erecting Potain White Plains NY |
Philippe Dumas posted two photos with the comment: "GMK 6300L lifting Air compressor to the lake ground from the dam 74m main boom + 21m jib was necessary to reach radius."
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Larry Winchester Jibs are for height, not radius.
Keith Havard Hope the pic of boom flexed is with load on hook.
Mike Newcomb lot of cable. [I wonder how much weight the cable itself adds to the load at the end of the boom.]
Mark Walker I'm thinking he maybe close to the end of the chart in that second pic looking from the rear
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| Justin Johnson posted She wasn’t much to look at but she liked the abuse. |
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| Jonathon Sisk commented on Justin's post 7000 pounds at 220' using a "250" |
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| David Whitehead commented on Justin's post The 5275's replacement, 5250L. |
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| Johnny Karason Thomassen posted I am gonna say tnx for my time in this group 😊 with a picture of what I thought this group was about 😊 7.8 tons on 50.6 meter GROVE GMK5250L |
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| Tyler Widdifield commented on Johnny's post |
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| Ray Little posted Don’t know who it is but my dance partner for a day is doing a hell of a good job with his GMK6350L. This first pick was 6,000 at 230’. He still had another 45’ to go to set it when I took this shot. Bubba Faiola Mike Keen |
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| Peter Webb posted 78.5 meters |
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| Terex Cranes posted Here's a great example of collaboration - Cropac Equipment Inc., C&C Crane, Total Crane Rental, and MTN Forming brought their expertise together on this Ontario waterfront project with Terex SK 315 and SK 415 tower cranes http://info.terex.com/OntarioTowers [It looks like there is a bend in that boom to me. It also looks like the inner segments are only partially extended. I assume they are overlapping more steel at the base of the boom to try to reduce the bend.] |
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| Balaji Mani posted [Each segment is extended the same amount, but only about 2/3 of its length. I think there is a little bend in the boom.] |
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| Frank Pintaro posted
Just a little boom deflection Gmk 5275
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| J.P. Duffy posted Might be short rigging a couple pics tomorrow [Building a Potain tower crane: "It will be a MDT219 10t 65m jib." There is a long discussion about "line pull." I don't know what they are talking about, and evidently the operator also does not understand either.] |
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| Rick Kleuskens posted Toronto 23/09/17, one of 11 photos posted |
This one is interesting because I do not notice a bend in the boom even though it was operating with a rather long radius.
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| Bay Crane posted [It looks like there is a little bend in this one.] |
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| Patrick M Harrison posted Fish on!! |
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| Brandon Leichinger commented on the above posting |
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| John M. Childers commented on the above posting I can relate!!!! |
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| Devin Parsons posted Fish on!!!  🎣🎣🎣🎣 |
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| Brandon L Grace commented on the above posting Why yes. |
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| Thomas Dearmond on the above posting |
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| Brandon Owens commented on the above posting Yes sir. |
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| Brian Fogtmann posted Manitowoc 5130-2 Butch Gray Gotta love deflection |
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Philippe Dumas posted three photos with the comment: "GMK 5250L"
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| Phillippe Dumas posted GMK 5250L Jim Paris I'm guessing that the charts say it's a good lift, but man that is an ugly looking boom angle!Philippe Dumas 70 + 21m jib at long radius = it seems normalPete Lefebvre With that jib probably lifting roofers styrofoam |
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Luke Brower posted two photos with the comment: "From JJ Curran's page."
Luke Brower Need to reach from Detroit to Ohio looks like the crane for the job. 336' and no luffer.
Bill McCarthy If it didn't deflect , then I would start to worry .....
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| David Whitehead commented on James' posting When I load tested my 5250L. |
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| Neil Frampton posted Bit of deflection William Gadbury What's that 20% off set ?Neil Frampton Yes William it’s 20 degrees offset with 5.4 ton at 25.7 metre radius mmmmm [I wish I understood the "offset" terminology.] |
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| Brady Buckland commented on the above posting Flex |
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| James Zampier posted Just a little fishing today. Michael Singleton Nice deflection shot. |
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| Master Britt Lipscomb posted GMK 5240 |
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| Jahanzeb Afzal posted [Building a tower crane. If the city would have let them block a traffic lane, they could have used a cheaper hydro because it would have been closer to the tower.] |
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| Kevin Mitchell posted Grove 6300L... lifting 12.5 ton( 27500lb) for you lot over the pond..75m(250ish ft)boom at 30.4 m (102ft ish) radius... the pic really does not do it justice..hoisted load down just to see how much deflection was there and she came back 7.3 m( 24ft) Bill Sharp That’s normal they are made to do that or the boom would snap |
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| Graham Morris commented on Kevin's posting Bendy bendy |
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| Dustin McGovney commented on Kevin's posting |
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| Louis DeFazio commented on Kevin's posting, cropped |
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| Brad Young commented on Kevin's posting Bendy bendy bendy |
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| Anthony Perrotta posted Tms 9000-2 in syracuse ny Clint Johnson I love seeing pics that really show boom deflection. I was under the hook of a 250t all out with jib and aux stinger. Thing looked like a fishing pole with a big one on it. Steve Wilson Nice! Jamesville trash plant? Anthony Perrotta Yes sir |
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| Anthony commented on his posting Yeah it's impressive for sure. Here's another -2 with the insert and luffer in it |
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| J.P. Duffy posted Name that banana Michael Reich Tms9000e-2 |
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| Bay Crane posted Briand Jones The beginning of a crane rainbow. Jonathan Cummings Cranebow, work on your comments. Marco Santoro All that sweet boom deflection without showing us what's on the hook.... so not fair @bay Crane Thomas Hagans Jon Shrock stretched out Jon Shrock Thats gotta be around 200-225 radius |
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| Chris A Baez commented on Bay Crane's posting Dale Lanham Damn I didn’t realize they bowed that much!Scott Lozier They bend like a fly rod.Joey Colicchio Normal for a 275/300 long boom with jib...just looks scary |
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| Clayton Chaban posted 6300L |
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| Jr Lemasters commented on Clayton's posting |
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| Trevor Crawford commented on Clayton's posting |
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| Brad Young commented on a posting |
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| ALL Erection and Crane Rental posted #ThrowbackThursday to over a decade ago at the Rock and Roll Hall of Fame in downtown Cleveland. This 250 USt Grove GMK 6250L really rocked out on this job! |
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| Matt Helms posted A little fishing today in KC. 4400 gross @ 255’ |
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| Ben Mason posted dismantling tower in Brisbane Australia |
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| First of ten photos that Wynand Louw Smit shared Dismantle Potain MD90 [There are a lot of comments about the twisted cable. I didn't notice it until I started reading the comments.] |
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| Matteo Serra shared |
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| Walter Hansen shared Ben Longman Amazing the boom didn’t snap.... |
It does demonstrate how strong these cranes are when they tip over. Usually the boom and the outriggers remain intact.
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| Machinery Planet posted Keith McDonald: Stabilizer arms are long but on the wrong side.....trying to avoid marking the grass. [Another comment pointed out that the boom had a low angle so it had a large radius. But not extending the stabilizer arms on the side of the lift is rather obviously bad.] |
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| Screenshot @ -0:19 (source) |
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| Screenshot Skip the first minute of this video, then you can watch the boom bend up and down. |
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| One of three photos posted by Ryan Medley, cropped 269ft Radius [It is too bad he didn't turn his phone 90 degrees.] Ryan Medley right on bro that's max chart just doing panel dont weight much Pete O'Neal Glynn Carpenter that demags beams probably cracked Ray Little Great full shot of all that deflection! A swing away extension and the telescopic both out too. Nice. |
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| One of three photos posted by Ryan Medley |
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| Jared Marcotte posted Our GMK 6300l getting busy yesterday! Stephen Spencer If it's not flexing, it's not working. Jim Ball I KNOW they’re designed that way - I KNOW THAT - but it still creeps me out! Gary M Hardin That’s a little too much arc for my comfort. |
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| One of three photos posted by Kevin Priestly Hunter Valley |
Several photos of flexing in the replies to Kevin Mitchell's comment in this post.
Ted Price Years ago when the large hydraulics came out it took some getting use too seeing the boom flex like a fishing pole. you would immediately check the chart.
Bending to the side! (Lateral bending)
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| Nick Beaman posted First time for everything. Been working with the sun only on one side and it heated up one side so bad the cable came off the boom guides. This pic is after 15 minutes of sun on the opposing side. Diane Martin We got Solar deflection on our Liebherr here in Arizona. Paul Gonter Had something similar happen on hundred ton grove. The guides in boom were out of adjustment. Not a pretty sight. Could look up and see cable as a stringline showing curve in boom. |
Mike Pesko Solar deflection
Tristan Hulley I think Liebherr references this in there manuals.
David Whitehead Several manufacturers specifically mention this. It's one of the big reasons why the new Link Belt booms are painted white.
Ted Fortier Link belt refrences it in the 8090 book as well. "Up to 15ft solar deflection is acceptable before derating is required."
Frank Wichner Can you show me that Ted Fortier, every Link Belt manual I've seen that references sun distortion says to immediately equalize (spin that sucker 180), no allowances given. Just wondering if there's new instruction out there that I haven't come across.
Frank Wichner 15' is a shit ton off center.
[The comments include some images from manuals.]
Nick Beaman My ltm1130 did it to the point that the cable came off the rollers at each section and laid down in the luffing jibs hydro line brackets.
Riley Anderson I’ve had the ball move about 10’ from side to side because of thermal expansion/contraction.
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| Shane Standford commented on Nate's post Yep |
Bending in the wrong direction
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| Chuck Ellis posted [I noticed the other cranes in the background. A lot of comments about why would they have a long boom at that low of an angle without counterweights on.] George Lamoreaux CRW Woods Yard, Link Belt DealerBud Lee George Lamoreaux I was told the tech said the “wind” got em |
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| George Lamoreaux posted this the day before the above was posted [His name in the comments on the above post is greyed out. That means he is no longer a member of the group.] |
A telescopic luffer jib on the end of a bending main boom
Breaking
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| Posted, cropped Craig Harry Cameron Derek Manns seen one of these before ?Derek Manns No never broken like that.Garrett Larkin Brian Boudreau I'm not even sure how.Brian Boudreau KATO's new series of knuckle picker. [It looks like Kato needs to go back to the drawing board (actually, the computer screen) and add some steel to the main boom. The problem with computer aided design is that it allows the engineers to build with less steel than they did in the pencil and paper days. That improves the cost of building, but lowers the margin of safety.] |
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| Posted Jeff Funk Looks like rotec failure ouch [This is the first time I have seen a photo of the attachment of the house to the truck failing. Normally the truck tips over if the load is off the chart.] |
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| Chuck Ellis posted Casey Van Beekum That may be the dumbest thing I seen that took some effort of stupidity those little cranes are pretty tuff even with the wrong configuration they will usually float first. [I gather from some other comments that "float" means an outrigger will start to lift off its pad.] |
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| Chuck Ellis posted [Well, the boom didn't break, but there is obviously a heavy load that still hasn't touched ground. Given the low boom angle, the radius was probably off the chart for the weight of the load.] |
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| Chuck Ellis posted [The boom did not break even though it was obviously under a lot of stress.] |
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| Carlos Felipe commented on Richard Dobbelaire's post If u r not bending u are just pretending!! [From the context, I think it is a Grove 6300L-1.] |
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| Screenshot from a Scott Schisler video for which I don't know how to get a link The video is a comment on Richard Dobbelaire's post |
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| Chuck Ellis posted Brian Eisenhart Finally...a full CW tipper. I'm impressed. Scott Shumake Crane works murfreesboro tn I do believe [It is a testament to the strength of a hydro crane that they remain intact in many of the tipping accident photos I see. The comments indicate that he may be able to salvage this by simply hoisting down slowly. It looks like it didn't even damage the building. Actually, the building probably saved the crane.] |
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| Lonzie commented on a post 6300l 282ft |
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| S S Dhami Dhami posted Terex ac 300 tons [This is the most bend I remember seeing with such a high boom angle.] |
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| Screenshot @ -0:05 [It was the close crane that first started to tip.] |
Jeff Corrie posted two photos:
Mike Weaver Bold Line.....
Richard Thomas Above the bold line is all structural and below the line is tipping or do i have it backwards??
Mark Adcock Richard Thomas you got it correct.Corkey Crane Those old Link-Belts are really stout machines. Looks like someone was waaaay overloading it!
Mitchell Gomez Caisson removals is what did it.
Corkey Crane Yep, that'll do it! Personally, I wouldn't use anything but a crawler to pull caisson tubes.
Chris Johnson I hate doing anything foundations related with a hydraulic. I see pinned-boom cranes doing tings like this and absolutely cringe.
Mitchell Gomez Shaun Sedam as in construction safety is a facade. It looks good while reporters and the media are watching but many times I have heard can’t you push it we need this truck unloaded. It’s outside of the charts I would say. They would rather blame the operator then take responsibility in any way shape or form. The operator of the Big Blue Lampson that went down killing three iron workers has to live with his part even though he felt the wind was an issue and the pick should be put off until wind conditions were better.
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| Mark Crane posted Erik Mccartney here we see the elusive mating dance of the RT crane its very rare to witness such a dance since you usually only see one at any given time. Al Kurtz I imagine one operator didn’t lift his share of the load so when the overloaded crane lost it, The other went as well. Sourav Sehdev Al Kurtz i think you are right. Doc Bailey I could have bet money without seeing them that they were good old Terex steel. From China. Jimmy Feiden And that boys and girls, is the difference between structural capacity and stability. Jimmy Feiden "Awwwww hell! You ain't light yet. Get up on it!" [I think he means that just because the crane is not close to tipping does not mean that it can handle the load.] |
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| Chuck Ellis posted, cropped Down in pompano FL. [You don't want all of the bending in just one joint.] |
Dave Warren posted three photos with the comment: "Kink Belt."
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The first 30 seconds of this video is interesting. It shows that the boom needs to be raised as it bends underload. It is selling a computer to do the compensation. All of the comments felt strongly that another computer is not needed because any decent crane operator can "hold radius." (source)
Thank you for sharing this informative post. Betal Engineering Pvt Ltd provides crane testing certifications under statutory provisions of Maharashtra state and central government of India.
ReplyDeleteLoad Testing of Cranes
Our LMI (computer display) already adjusts its displayed radius to account for boom deflection. As you take weight with only cable up the radius will increase. So we boom up to maintain the radius as well as cable up as needed. Sometimes if deflection is extreme I've needed to cable down while booming up to hold radius. Once you learn a crane it's something you can do instinctively without watching your LMI all the time.
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