Crane reeving diagram - Why does a crane ball weigh so much
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- Опубликовано: 8 сен 2024
- In this video, I answer a few questions that I have gotten in regards to reeving the crane block and adding weight to the crane ball or block. Reeving diagrams should accompany every crane. The general rule is to even distribute the reeving across the entire upper and lower blocks.
This video is just for the purpose of demonstration only. You will need to consult the manual for any information regarding the machine you will be operating.
Jimmy, your explanation was a lot better than the first couple of rigging classes that I took. Thanks!
David Sonnen, many thanks! As always, thanks for watching! 🙂👍
Thanks for taking the time to post that. I've been operating a Grove 35 ton crane for about 8 months myself. I already understood most of this but it never hurts to have it reinforced by someone with a lot of experience. We put the jib on for our first time a couple of weeks ago an managed to get the cable snarled up even though we had a small loader pulling on it to try to keep it tight. It's something I would like to avoid doing again. I'll be doing it differently next time around. We're using our crane for doing tree work only.
Griffin Specialty Industries, I'm not a fan of tree work. When in doubt, cut small. Lol. If you have any questions or if I can help in any way, let me know. I'll do my best. Many thanks for watching! 🙂👍
@@ToTheTopCrane Yes I could see that. There's a lot of unknowns when doing tree work. Are you familiar with wet wood weight calculators? They help a lot by at least giving you approximate weights. They don't however take into account the foliage which can ad up a lot. The crotches are also more dense. We aim to work at 60% of the chart max to allow for slight miscalculations. The weight is also variable due to how much water is in the tree at that point in time. We've been doing crane work for years but we got to the point of buying our own in 2018.
I really appreciate the offer of help. I may take you up on it at some point. Thanks for taking us along with your crane adventures.
Your drawing skills are good enough to get the point across .
VideosByAl, thank you! Many thanks for watching! 🙂👍
Ya done good! Even your artwork was discernible.
I did a 28 ton Pioneer for a time, and the cable would stack two or three lays on the left side of the drum before it would drop down in place. That meant that the load would drop every time with it. They finally resolved the problem but sure was unnerving when a load would drop 'n bounce like that. The Pioneer was the only unit that has a 2° & 10° offsetable jib and stinger, wireless LMI, 94' main, with a tip height of height just short of a hundred and fifty feet. It was quite a machine. They got bought up and shut down during a monopoly Shuffle.
Wishing y'all a safe, prosperous and blessed New Year!
Barry Simmons, thank you! That 28t Pioneer sounds like quite the machine. I bet it was a fly rod with all the main, the jib and stinger. Many thanks for watching! 🙂👍
Great explanation, thanks. In theory you can pick up a 100 ton load with 25 ton rope, if you have enough wraps around the blocks.
longcaster, thank you! The theory is correct. We do it all the time in the crane world. Many thanks for watching! 🙂👍
Great job and very interesting for a non-crane person like me. I love to learn new things even at 80 years old.
MrTodd51, thank you! I say we are never too old to learn new things. Many thanks for watching! 🙂👍
Great explanation! I was setting up for a truss job with some pretty long picks a couple years ago, I had ran out enough boom for the job and as is my habit I ran the line up into the a2b for a function test and all was good so I started swing back to the pile for my first pick booming down slewing and winching down while watching out the side window judging the radius for my first pick, I looked back at my boom tip and the ball had not been lowering. It turned out that the a2b chain had got fouled in the line clamp on my tail. Long story short it cost me a $4,000 line. The only good thing was the line was scheduled for replacement anyway.
Crane Fan, that would be no good. Atleast it was scheduled for replacement. Many thanks for watching! 🙂👍
Thanks for the explanations & drawings👍
Kevin smith, thanks for watching! 🙂👍
Really great stuff Jimmy, well explained too. The light bulb turned on.Thanks!
dmacdonell, many thanks! As always, thank you for watching! 🙂👍
Thank You for answering my question. I appreciate it greatly.
Paul Lester, thank you for watching! 🙂👍
Excellent explainion. Have a nice weekend.
walter mattson, thank you! Hope you have a nice weekend as well. Many thanks for watching! 🙂👍
Great video I picked up lots of useful tips
Always good info thanks for doing what you do.
Andrew Lasure, thank you, and thanks for watching! 🙂👍
Excellent job
John Boy Spot, many thanks! Also, thank you for watching! 🙂👍
Nice video for a new operator :)
Hey Jimmy!
Very cool info session, you make a great presenter and you do great on the diagrams. You don't have to be an artist to get your point across...lol
Happy New Year to you and yours!
Doug@ the "ranch"
Doug, thank you! I do the best I can with my limited public speaking experience and artistic abilities (or lack there of). Lol. Many thanks for watching and Happy New Year to you and yours! 🙂👍
Good video Jimmy, just a small point, with that big of a board you could've made your drawing a bit bigger ! 😊
You know, for us old farts with bad vision ! 😊
Thanks for sharing and take care. 👍
Ken Gamble, thank you! Next time I draw something, I'll try to use more board. lol. Many thanks for watching! 🙂👍
good video. Im getting ready to buy all new rope for my Insley. Not quite sure how the shipper shaft gets reeved and the manual doesn't go over it well. cable was already broken so I have nothing to go by. Main boom shows it better and is pretty simple. Played with raising and lowering the boom the other day. gotta be on your toes with gravity down instead of powered.
73DiamondReo, that rig sounds like a handful! Many thanks for watching! 🙂👍
You can improve gravity descent in a friction rig by disengaging the engine clutch, and engaging the "lift" brakes... This will force your load to turn all the draw works too.,.
Good job of keeping it simple. I do have a question for you to explain in a future video. Why does the boom extend in almost whole sections IE 93% for the first couple, rather than 3 or 4 sections at 50%. Wouldn't there be less deflection this way.
KEVIN MATTHIESEN, that is a great question! I'll make a video on the topic for you. Thanks for the idea and for watching! 🙂👍
Revers mechanical advantage, boom angle, hook height limit and why they are so important.
Well done on explaning how things work i have played with parted lines before.
Happy New Year to you and your family.
I think you just answered my question - what is the little collar that hangs from the chain at the end of the boom tip? Sounds like that's the anti two block device. Prevents the lower block from crashing into the upper block.
Good job👊
Andy B, thank you! many thanks for watching! 🙂👍
Great tips at the end
Doing great keep the knowledge coming
You should do a video demonstrating making a becket! We are definitely spoiled with the quick beckets on our liebherrs. Lol
JB 98, that's a great video idea! Thank you for the idea and for watching! 🙂👍
Nicely explained
Lacing is when the rope comes into one side of the block, reeving the rope comes into the centre of the block. Reeving keeps the block even.
Jimmy, I see your crane is two parted most of the time. are you able to fully scope out and touch the ground with 2 parts is that why you favor 2 parts? whats the minimum parts of line you can have before your not able to touch the ground fully scoped out with your crane? just curious
R Q, I can reach the ground with 5 parts of line with full main boom extension. I prefer 2 parts because it makes it much faster while setting up, and that's the minimum parts of line required to handle the counterweights. Many thanks for watching! 🙂👍
Good Vid ,,, TY
John McCallum, thank you! I had a few people ask questions. So, I figured a video was the best way to explain it. Many thanks for watching! 🙂👍
Hey I really appreciate your videos. I am going into training this year and have been trying to learn more before going. Watching your videos has greatly helped. I was told by one of the gals in my interview that I need to brush up on my math skills and was curious if you had anything you recommend that I work on? I watched your video on Gross and Net capacity including deductions which was wonderful! Let me know! Thanks
Sam
...thanks for the info...Archimedes would be proud...
Good Education time
Daniel Eyster, thank you! Many thanks for watching! 🙂👍
We uploaded our videos at almost the exact same time! And you are definitely going to want to watch this latest one.
Alex Williamson's blind adventures, I'll check it out! Thanks for sharing and thanks for tuning in! 🙂👍
Great video, however I have a question.
I'm trying to find a reeving diagram for the booms on a large crawler crane to no avail. All I can find are blurry pictures of actual cranes and there's a whole lot of weird things happening with the rope. Any help is appreciated.
How often does the rope get replaced? Great explanation. Thanks for sharing.
japcas, thank you! The rope life is determined by maintenance and how it is cared for. If a person is very careful, the rope can last quite a long time. Many thanks for watching! 🙂👍
Usually there are/is a measurement taken of the rope to see how badly it is worn. There are limits to that so you know when you should replace the rope.
Nice IBEW shirt!
I could never get it right with a 2 part line, which way to twist the cable so it hanged straight and not crossed....
Michael Owen, typically a half turn the opposite direction of its twist will keep it from crossing up. Thanks for watching! 🙂👍
i just bought a 1979 Drott without a blockt then found a beautiful 30 ton mckissick at an auction for thirty bux!..im going to reeve it 3 parts..using 2 sheaves top and one at the block then deadman at the block..right? its got 2 sheaves on the block but i will only use one,,,plus the deadman...i puuled off all the 5/8 cable because it birdnested on the last guy who was silly...how do it get it to go back on the winch drum smooth? i thought maybe i will hook the rope to a pickup not running and roll it up on the drum,using the pickup as a load...whatcha think?
Hello, great vid! Can i just ask why and when you would need to change the number of falls/lines? Thank you
Question.
On lifts where multiple parts are used, each part will "move" at different speeds with the first part moving the fastest. How do you keep the block/hook level if each part is moving differently?
Each part of line is reeved around it's own sheave. The sheaves can turn at different speeds. They share a pin, but are independent of eachother. Hope that makes sense.
My question is a bit off the subject, but I see plenty of cranes tipping over due to various reasons...I can see how trying to recover by 'boom down' would fail, by instantly increasing the lift radius….BUT what about releasing the winch to sort of 'free-wheel'...? Is this even possible, and would/could it help save the crane...??
Doug Ankrum, the newer cranes don't have free fall. So, the only recovery would be cable down as fast as possible, and possibly boom up (but that may upset it even worse). But, trying something would be better than trying nothing. Whether it would work or not, depends on lots of variables. Many thanks for watching! 🙂👍
The older cable cranes were friction operated so they had a brake on the drum that could be quickly released to recover in a tipping situation. Hydraulic winches can't do that. Even the ones that can be free spooled can't be released under load. That's why it's so important to keep everything within the safe operating limits of the crane.
Well, most of these 'crane wrecks' appear to be in non-USA countries and look like they are marginal for the job, and many seem to have 'stability' problems with outriggers/mats...
I'm a oiler going for my cco in October I was wondering if you would give me any pointers I've watched all your videos more then once. But my operator is a grouchy old man that doesn't want to show any one of us oilers anything.
Some old guys think you are going to take their job so they don't like to teach. I knew a carpenter like that. Operators like to make believe they are the only ones who can run the crane and the company would be lost without them so everything is top secret.
I’ve been meaning to ask what are those two models in the background?
Kobi M, one is a Tadano 160g-5 and the other is a Tadano gr1000. Thanks for watching! 🙂👍
Thank you
i believe you can deadman at the block for odd number parts..i think..
yes you can.
Jimmy, worked with heavy cranes for half my live. You dont mention friction on the sheaves, Maximum number of lines you can use on one winch or a single line pull is 32 parts. After 32 lines the friction on the two sets of blocks defeats mechanical advantage.
Does it work to run 2 parts of line on a 3 sheave block? It seems like it wouldn't be very stable but I've never tried it.
I noticed the IBEW LU 317 logo. I'm a 53+ years retired IBEW LU 238 member.
Larry Keenan, the shirt was sent to my by one of my subscribers. Congratulations on 53+ years and your retirement! Many thanks for watching! 🙂👍
Does your company do bridge work if so can you do videos on this
JDS Lawncare and Landscape, we do occasionally do some bridge work. I have a few videos of bridge work that we did over the summer. I'll post a link here. Thanks for watching! 🙂👍
ruclips.net/video/L5yMi92IyBw/видео.html
ruclips.net/video/mb92DzaOk94/видео.html
when you determine how many parts of line you'll need for a bigger lift do you base it off of line pull or winch pull. ie depending what layer on the drum you are would limit how much you could lift?im just thinking about a heavy object that just has enough parts of line to make the lift and you are near the top of the boom so you would be on your largest layer on the drum. i haven't been in that situation yet but i have made lifts near the max line pull and the winch would be jumpy.
We base it off of line pull. The winch is actually rated for more than line pull. But, is de-rated down to line pull by the manufacturer. If your winch is jumpy, you may have a mechanical issue or too much rope on the winch.
I don't know if anyone has asked or not but why a tadano crane and not a grove, link belt or liebherr? Do you have a preference
Derek Havermale, the company I work for has had really good experiences with Tadano. The Tadano's that we have and had just work. they have a great chart, are reliable, and when the occasional issue comes up, Tadano customer support is fantastic. I have, without exaggeration, 10 different phone numbers that I can call at anytime of the day (or night) and get customer support. I have operated Grove, Link Belt and Liebherr, and I would put Tadano with any of them. Sorry for the long response. Many thanks for watching! 🙂👍
How long you been running cranes brother?
Unionme1, I've been working on and operating heavy equipment for 23 years, just about 10 of those with cranes. Many thanks for watching! 🙂👍
@@ToTheTopCrane yeah really enjoy your vids brother. I've been operating for 18 yes and just starting out in cranes. It's like starting my career all over a lol.
@@unionme1157, cranes are a whole different world from other heavy equipment. I generally describe it as hours of boredom with minutes of excitement. But, that all depends on the particular job at the time. With cranes, the smallest details can make the difference between success and catastrophe. Be safe out there! If I can help in anyway, let me know. I'll do my best.
@@ToTheTopCrane ty I just might. Once I get my Hydraulic(telescoping)OECP in February I should be good to go. I can definitely tell how you got to pay attention to the littlest details with operating a crane.
@@unionme1157 , the OECP written test is a tough one! Make sure you study well. Don't try to cram the day before.
What is reeving?
Make your drawings a bit larger. This will be easer to illustrate. who cares about your artistry.