If the forklift is a telehandler and you have suspended items, the principles can be used to control the loads. More to stop the swinging because the unlevel ground will cause you grief anyway. Get the principles going in your head there and it will help you on your next career stop. Good luck.

@@rotyag thank you I appreciate it and yes a telehandler the biggest I ran was a magni 5.25 I work in a masonry company so I run the machine every day very neat machine that’s what gave me the more confidence to get more into that world

The top tier operators on a good crane like a Liebherr 316 can make 16-17 picks an hour. But the guys on the ground that can handle that aren't terribly numerous. Same for the number of operators that can run well like that. Even in my area where we probably have 120 tower cranes up, I'd bet that we don't have 20 that can really wring everything out of a crane safely. If either side of the puzzle isn't top notch, you are dead right. Correct on the jib too.

Thank you. I'd love to learn how to run a crane from the days of thr old friction rigs. Worked around a number 3900's and 4100's, but I bever got to pull a lever.

Jordan J. If you can run crane for any railroad in North America you can run anything you put your mind too soldier. That has to be the toughest, sketchiest business in the world. I have 40 years on a hook of one or the other and that job you do scares the piss out of me. Mind you most people consider me sane.

The towers are massively strong. The cranes lean back virtually at all times until you are hitting the moment limit which are the limits on the loaded jib side. This leaning back helps in the winds. The crane point down wind at all times so they can lean into it. The bases spread out the loads 8 to 9 meters in all directions, and they are 1.5 to 2 meters deep with concrete. So we are talking about 250 to 300 metric tons holding it down. So they only suffer problems if the soil is bad or has water problems. Towers don't naturally fail. Whenever they go over, there is a story to be told, and it usually a human error. I was involved with a collapse in 2006, and all fingers seem to point at the engineering. Of course I know the answer, but the full fault determination is something that isn't released. "We'll pay this if everyone shuts their mouths." And money keeps the secrets and reputations safe.

@@rotyag wow i understand it a bit better now is there rebar in the concrete base as well

Yes. They deflect based on the height of the crane, and it varies by model. For a max free standing 90 meter tall crane it could be on the order of one meter of leaning back. Some towers are quite a bit stiffer and others feel like an amusement ride during operations. Older cranes we used to erect without tight bolts were horrifying to look down as we went to tighten the bolts. I owned a crane that deflected enough that the tower was essentially as S as if the tower was near failure. I changed the process of erecting the crane because it was past my comfort level. I managed to sell the crane so that I didn't have to look at that tower doing that anymore. The good side is that in high winds, the cranes are essentially leaning into the wind, and this helps them resist wind loads.

@@rotyag thanks for the answer and more detail than I expected thank you for that 🙏👍🙂 Ye looking at those heights looks pretty terrifying lol especially if it's swinging like an amusement ride, although also sounds kind of fun lol. I can't even imagine what the tower being like an S would look like sounds scary. Going to have to look up wind loads not heard of that before 👍 1 more question if you don't mind. If it leans back with no weight on hook and you turn 180 degrees does it then lean back in the opposite direction but still back relative to you in the drivers seat?

​@@Rachie-nj3oi As you spin, the lean direction changes with it direction of the loading. Normally that's the counterweights until you are at "Moment", or tip capacity. The only time you really feel it in the seat is when you go from sitting back in the seat, to putting your foot up on the structure in front of you for balance. I'm being dramatic, but you do feel it. Another condition that causes you to feel it is when you set down heavy loads and the crane starts to bounce. Old cranes only had a couple of speeds, operators my age and older are comfortable setting down the load at a good speed. That release of energy forward into rearward leads to a crane that sways front and back. About the crane directional change, I was on a 21 story project once where when they put in the 21st floor, I suddenly had a clunk happening as I would swing back out to the street. I thought it might be a mechanical issue. I'm working the crane back and forth trying to find why it's happening. I eventually had someone go to the edge of the building and we found that I was hitting the building with the tower and the clunk I was feeling was that contact. They had to cut the plywood for the floor back a few more inches because the crane mast shouldn't be hitting things.

@@rotyag thanks for the clarification much appreciated 🙏 🙂 👍 Oh dear that doesn't sound good, good job it didn't cause any damage to the crane or building from the crane hitting the building lol.

The anchorages for tower cranes usually embed into concrete by 1.3 to 1.5 meters deep. The concrete pad will vary based on soils and size of crane. But 6 meters to 8 meters squared with at least 1.5 meters deep is typical. The anchorages are usually steel with channels and plate. Their real purpose is to prevent pull out from the concrete. They generally don't suffer from forces that would push them down too hard. Most tower cranes run on 380 at 50z to 480 at 60 hz. I have some that run as little as 60 amps. Then they get up to 300 AMPs for the larger luffing cranes with two large motors. You might see 350 AMPs for ridiculously large cranes. Usually a modern crane will have VFD (inverters) to put the minimum power to the motor. Starter circuits are hard on motors and they have massive inrush currents (Locked rotor or start up draws). The inverters limit this and make the motors last a long time as opposed to 3000 hours. For height, the tallest of the tower cranes freestanding would be 100 meters. Normally it's limited to 80 meters and varies by crane model from there. Like my small cranes, after 36 meters, I have to make the towers larger, then reinforced, and larger, and larger. They keep transitioning to reach tall heights. If you want to make them taller than 100 meters, you have to secure them to something. Usually it's the building. Then we can jack them up hydraulically. Takes about 45 minutes per 6 meter section on most cranes. It's an interesting process. The longer reaches are generally 80 meters. You'll find a crane or two reaching out to 85 meters. The giant Krolls reach 110 meters, but they are an exception to all of the normal rules. 80 meters is a good number to remember as the limit. Largest capacities in construction are normally 20 metric tons. Many of the 20 ton cranes can be set up with another trolley that will let them lift 40 tons. Usually you'll only see that in industrial settings, or for bridge or tunnel work.

rotyag I really like to thank you, l am appreciating yours advices and wisdoms about Cranes Tower, actually l am painter of buildings and l would love to make a clip video about this big machine, l love constructions and with yours big help ll be much mor easy to make a very nice video when ll be Installation also disabled too. Also thanks for your very nice explanation preciso exactly my feew questions. When ll make vídeo l ll speak on my idiom like Português, But l am still learning with your channel a lot, later l ll already to talk about, But you of course always the best. Again my special thanks Joselito Brazil

What's the path to the seat in your area? I was a crane erector. Moving into the seat was pretty natural and easy. But I also put in 50 to 100 hours sitting behind great operators learning how everyone did it. Everyone is different and each crane needs different inputs. That's a learning technique that I really wish was widespread.

@@rotyagIn NYC They GateKeep And Put Their Own Family In. Barely Put Minorities In Crane Operator Jobs. I Definitely Been Having To Go Out Of State For Work.

@@DaddyCrane That's what I hear from 3000 miles away too. It's pretty slow in NYC from what I see in sales stuff these days. I see NYC contractors setting up in Florida like a freight train is taking them all down there.

I don't disagree. I find it useful for a couple of scenarios. Bucketing concrete as you change a column. You can hit the number as they swap columns with their gear and just need to adjust as it hits their hands with the swing or trolley. And it's great for placing booms or cores that might have one number to start with, and deflection would change that read dramatically. This just allows one to hit the number and not need a rigger to call it. But in these vids, you'll see that a couple of the cranes are Liebherr HC's. You've got nothing for an indicator to work with. If one doesn't know how to run this way, they'll never hit production speeds.

Yeah. I learned on the old wolff model's so you don't have any of the luxury's. I'm in a newer luffing model right now and don't really use the monitor cause it is not habit. Had a guy cover in the seat a month ago and i was rigging. He asked what radius i start at pulling the core and i didn't have an answer cause i really didn't know. 28th floor and i don't think i had ever looked. Lol