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Yo I've always wanted to operate heavy machinery. A big loader like that seems like it would be entertaining with a lot of potential for OSHA. When I was a kid my dad took me to his factory and had to go check on some machine, left me standing by some pallets outside the door and those huge loaders were flying around and it terrified me. Other workers were just strolling across the yard too near these things.
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Apr 10, 2019 21:47
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Fancy_Breakfast posted:Yo I've always wanted to operate heavy machinery. I'd say forklifts and poo poo stop being fun at about 3,5 tons of capacity.
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Apr 10, 2019 21:52
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Jerry Cotton posted:I'd say forklifts and poo poo stop being fun at about 3,5 tons of capacity. For things about 3.5 tons I'm only guessing you move onto teleporters. No idea how fun they are but they look like they have potential for stabbing things and jousting.
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Apr 10, 2019 21:54
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3.5 is smallish.
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Apr 10, 2019 21:57
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Jerry Cotton posted:I'd say forklifts and poo poo stop being fun at about 3,5 tons of capacity. My forklift was rear engine, rear wheel drive, rear wheel steering. I've thrown myself off it before. It's also got chrome rims and white walls on it for ~reasons~ Unfortunately, i lost the faux spoke caps. e: here's me discovering it's limits. https://i.imgur.com/E620g83.mp4 That little fucker got it off the ground though. 
Powershift fucked around with this message at 22:07 on Apr 10, 2019 |
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Apr 10, 2019 21:59
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I spent about 2 hours on our training company's crane simulator and got a chance to try out part of our practical exam on a 40-ton crane after hours. It's very much a job that requires excellent hand-eye coordination, as you'll often be manipulating two controls at once to maintain smooth movement. Rough acceleration or deceleration will quickly have the load swinging like a pendulum, which requires you to know how to catch the load (basically put the boom tip over the load and gently follow its swing until it settles) to keep it from going crazy. During exams, sometimes a candidate will panic when this happens and end up swinging the test load so violently around the course that it flips upside-down or hits the crane, both of which result in disqualification. We use empty 55-gallon steel drums as obstacles and the test load has hit them hard enough that they've been flung into the air. You can operate three controls at once (boom angle, hoist, and swing) to make smooth circles around obstacles without changing the altitude of the load, but this is just for showoffs. There's virtually no real world circumstances where you'll actually have to operate like this instead of booming up or down to move back and forth, using the winch to adjust the height, and swinging left or right one motion at a time. Unfortunately the industry has a ton of this showoffs who think they're hot poo poo for lifting heavy stuff and getting to spend all day sitting in an air conditioned cab loving around on their phone until they need to actually do something.
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Apr 10, 2019 22:04
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Renegret posted:I work for an ISP and deal with underground utility cuts all the time. I'd say it happens to us about once a month. I lived in a city where two road construction projects in two summers hit two gas lines. Later on I talked to a guy who works for We Energies (local gas/electric utility company), and he HATES road work companies. They refuse to bring in vacuum excavators, which either blast air or water at the dirt and suck it up, which reduces the chance of a cut by far. He also then mentioned that a company that his bought out had reduced rates by deferring maintenance, and the people who had that company were livid when their rates went up because WHOOPS YOUR GAS PIPES ARE BAD NOW. Orvin posted:The most impressive thing about that video is how the rail flops around like a wet noodle. The sheer weight of the cars on that rail is massive. Apparently, continuously welded rail is really floppy, even when they're laying it down to replace old rail. It's impressive though how much stress it can put up with... provided you're stressing it the right way.
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Apr 10, 2019 22:04
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other people posted:This is maybe a block and a half from the famous 11'8" bridge. Bridgecam caught some audio of the blast. https://www.wral.com/can-opener-bridge-camera-shows-effect-of-durham-explosion/18317909/
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Apr 10, 2019 22:17
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Neat. I bet operating a tower crane is much easier.
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Apr 10, 2019 22:28
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The loader was definitely fun to drive. I was pretty cautious though since I didn't want to gently caress up the trailer of the truck I was dumping into. I've also been up in lifts like this many times. Those are fun too.
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Apr 10, 2019 22:34
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It's burgin' time! 
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Fancy_Breakfast posted:Neat. I bet operating a tower crane is much easier. I've only ever been on the simulator for it. Tower cranes generally seem to operate much slower and have no need to calculate boom angle, but loving up by lifting too much or leaving it up on strong winds can cause disasters the length of multiple city blocks. Basically, every mobile crane has load charts and range diagrams like this:   After you've determined the net capacity of your load (weight of the load minus any load handling devices like slings, shackles, and "headache balls"), you use the chart and diagram to determine whether or not you can safely lift it. As you lengthen the boom and lower it closer to the ground, the effective weight that you can lift without risking tipping decreases. The load charts generally max out at 80% of the actual number it should be to accommodate for shock loading (the load bouncing under gravity or being yanked hard off the ground increasing the effective weight pulling down on the boom) and risky or inexperienced operators trying to lift slightly too much. An operator who intentionally tries to go beyond the numbers because "it's not the real maximum anyway" deserves whatever punishment he gets when something goes wrong. This is why cranes end up placed where they are on a job site. You want to use the longest necessary boom length for the job (as changing boom lengths changes how much you can lift at different angles) and swinging on an incline can completely gently caress up how the chart works, so you need to be placed on level ground if possible in a spot where you can just set the boom and leave it the way it is. Lattice booms are more difficult because the boom is made up of multiple sections put together with pins and supported with tension lines, so you have very limited variance in how long the boom can be. Modern crane computers can even be set with specific limits to boom length and angle that they freeze and sound an alarm at when reached to try and keep dumbasses from doing something dangerous. And yes, there are a great many operators on the job today who don't use load charts and may not even know how to read them! OSHA didn't finalize the requirement for certification and employer evaluation until last November and the evaluation documentation requirements are being delayed for a little bit longer. A lot of old crane operators got their start because daddy owned a construction company back in the 80s and put him on when he was a teenager to learn the ropes, and now he's been operating for 30+ years with half a clue and only avoiding accidents by sheer luck. You can be safely assured that any time you see a crane tip over, it's a guy like that who's just been given lovely on-the-job instruction by an older operator and is relying on other people who don't know what they're doing to keep him from lifting anything too heavy or lowering the boom to unsafe angles. chitoryu12 fucked around with this message at 22:43 on Apr 10, 2019 |
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Apr 10, 2019 22:41
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iospace posted:I lived in a city where two road construction projects in two summers hit two gas lines. Later on I talked to a guy who works for We Energies (local gas/electric utility company), and he HATES road work companies. They refuse to bring in vacuum excavators, which either blast air or water at the dirt and suck it up, which reduces the chance of a cut by far. You just reminded me of my 17th birthday, when a crew working on the sidewalk outside of the high school cafeteria I was in hit a gas line during lunch hour. We heard the line hissing and saw what looked like fog shooting out of the ground through the windows. A few minutes later the entire world smelled like rotten eggs and they ended up dismissing us for the day half an hour later. Thanks for the afternoon off for my birthday, construction crew 
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Apr 10, 2019 22:42
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And don't even get me started on the loving slang. Part of my job is also handling the accreditation requirements and working on the psychometrics for our tests, which means crafting an exam for our industry that a minimally competent candidate can pass. This is maddening compared to crafting an accredited exam for something like accounting or medical jobs because the education level (both primary schooling and job training) of crane operators runs both polar extremes of the spectrum and nobody refers to everything consistently. Take the jib, for example. It's a folding extension to the boom that you can unfold and pin to the end to lengthen the boom. Except some places call this a "boom tip extension" and refer to a different part of the boom as the "jib". We ran into this when reviewing one of the questions because it was asking people to identify the jib on a picture of the crane and about two answers were technically pointing to it! As for education, it goes from people with master's degrees to people who left school in 4th grade in the 1970s due to dyslexia and an IQ of 85. Experience and training ranges from decades of experience and government-approved training programs to a guy who calls us to complain that he can't pass the test because he doesn't even operate machinery but his boss told him that he needs to get certified just in case.
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Apr 10, 2019 22:48
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chitoryu12 posted:And don't even get me started on the loving slang. Part of my job is also handling the accreditation requirements and working on the psychometrics for our tests, which means crafting an exam for our industry that a minimally competent candidate can pass. This is maddening compared to crafting an accredited exam for something like accounting or medical jobs because the education level (both primary schooling and job training) of crane operators runs both polar extremes of the spectrum and nobody refers to everything consistently. Okay, but how do you feel about acronyms?
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Apr 10, 2019 23:09
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Phanatic posted:Bridgecam caught some audio of the blast. drat! Now that the gas line is gone, can they lower the road?
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Apr 10, 2019 23:50
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Fancy_Breakfast posted:Yo I've always wanted to operate heavy machinery. Places exist for this: https://extremesandbox.com/
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Apr 10, 2019 23:52
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Elder Postsman posted:Places exist for this: https://extremesandbox.com/  I ain't some kind of manchild.
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Apr 11, 2019 00:26
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Fancy_Breakfast posted:
get a job you bum
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Apr 11, 2019 00:32
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I didn’t see any mention of this in the thread so far, but a 150’ tall frac tower melted 40’ up from the base, and tipped over. https://blackburnnews.com/sarnia/sarnia-news/2019/04/03/imperial-assessing-collapse-150-foot-fuel-processing-tower/
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Apr 11, 2019 00:34
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Former DILF posted:get a job you bum I get to drive a LWB box body sprinter for work. 4.5ton. It has a hydraulic tail lift. Definitely not as fun as heavy machinery. 
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Apr 11, 2019 00:36
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Place I work has a press that weighs 75 tons being installed in the next few weeks, can't wait to see how that gets transported into the building. Biggest thing they've had to move since I've been there was only 15T. All the quotes for pouring the base are coming in around $400,000 of concrete so I reckon it'll make a secure motorbike park until the machine comes. shame on an IGA fucked around with this message at 00:48 on Apr 11, 2019 |
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Apr 11, 2019 00:45
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I heart bacon posted:When did Swift branch off from truckfuckling into trainfuckling? it's even telling you NO
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Apr 11, 2019 01:11
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I drive big dozers on mine sites. Heavy machinery is fun for a little while, but after that it's just hard painful work.
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Apr 11, 2019 02:35
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Powershift posted:Okay, but how do you feel about acronyms? Surprisingly we don't really use any acronyms except "LMI" (load moment indicator, which is the fancy name for the computer showing the boom angle, length, etc. and can be programmed to keep you from doing stupid stuff) and the names of all the federal agencies and certifying bodies.
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Apr 11, 2019 03:11
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FuturePastNow posted:it's even telling you NO The dashboard said NO, but the hum of the diesel engine said YES!
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Apr 11, 2019 03:23
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chitoryu12 posted:I've only ever been on the simulator for it. Tower cranes generally seem to operate much slower and have no need to calculate boom angle, but loving up by lifting too much or leaving it up on strong winds can cause disasters the length of multiple city blocks. Looks pretty straight forward to use. Skipping it doesn't look like it will "save" any significant time.
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Apr 11, 2019 06:52
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chitoryu12 posted:Surprisingly we don't really use any acronyms except "LMI" (load moment indicator, which is the fancy name for the computer showing the boom angle, length, etc. and can be programmed to keep you from doing stupid stuff) and the names of all the federal agencies and certifying bodies. Since you seem to know this stuff, how do you calculate boom deflection?
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Apr 11, 2019 07:43
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chitoryu12 posted:I spent about 2 hours on our training company's crane simulator and got a chance to try out part of our practical exam on a 40-ton crane after hours. It's very much a job that requires excellent hand-eye coordination, as you'll often be manipulating two controls at once to maintain smooth movement. Rough acceleration or deceleration will quickly have the load swinging like a pendulum, which requires you to know how to catch the load (basically put the boom tip over the load and gently follow its swing until it settles) to keep it from going crazy. This sounds like the sort of thing that should be handled by a computer. Have the controls just indicate how you want the terminal load to move, and the computer implements it. Like fly-by-wire but without the flying.
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Apr 11, 2019 08:01
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oohhboy posted:Looks pretty straight forward to use. Skipping it doesn't look like it will "save" any significant time. I essentially make and read graphs for a living and I can understand it easily enough but I imagine if it's the only time in your life you really have to interpret a diagram it takes more thinking. But if lives depend on it I think you should get pretty drat good at using it
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Apr 11, 2019 08:01
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Scrapyard for ships and in this case, oil rigs. https://i.imgur.com/EeXBHCB.mp4
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Apr 11, 2019 09:07
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drunkill posted:Scrapyard for ships and in this case, oil rigs. Pucker Factor: Critical.
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Apr 11, 2019 09:43
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Renegret posted:My boss saw the same exact thing during the post Sandy gas shortage out here. alternatively it's thread favorite uncle rob therobit posted:I used to think it was dumb that my home state of Oregon doesn't allow you to pump your own gas. Now I think it's a good idea. i had to drive from CA to WA several times while moving and it might just be "the kinds of people that you run into in dead end truck stop towns on 5" but after having people on three different occasions smoking while they pumped my gas, I only started feeling safe when I found that one self-serve gas pump at the casino right at the midway point. (this did not make me feel safer about seeing the boomer oregonians trying and failing to figure out self serve but at least it wasn't my car that was involved)
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Apr 11, 2019 09:44
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drunkill posted:Scrapyard for ships and in this case, oil rigs. Knowing this was already getting scrapped and it doesn't seem like anyone got hurt allows this to be very satisfying.
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Apr 11, 2019 10:52
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oohhboy posted:Looks pretty straight forward to use. Skipping it doesn't look like it will "save" any significant time. It's straightforward when you know how to do it, but you need to know how to do it. The load chart problems on our exams are something like "If your boom is this length and at this angle, what's the safe capacity to lift?" or "If your load is between two numbers on the graph, which one do you use?" It's easy to learn but not necessarily so intuitive that you'll immediately know how to use it or figure out edge cases without training. The Lone Badger posted:This sounds like the sort of thing that should be handled by a computer. Have the controls just indicate how you want the terminal load to move, and the computer implements it. There's still a lot of old cranes in service with either primitive LMIs or no LMIs at all. It's not uncommon to see old lattice boom cranes with friction brakes instead of hydraulics, which is basically the equivalent of a stick shift instead of an automatic. This famous crane accident I believe was a case of an inexperienced or distracted operator trying to lower a friction boom without proper use of the brakes: https://www.youtube.com/watch?v=4OOg7vL3rNY
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Apr 11, 2019 14:03
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Also one thing with trying to make cranes automatically compensate for physics is that loads typically aren't symmetrical. There are classes and certifications for riggers because materials all have different densities and a load could be made up of multiple different materials in an asymmetric shape, which requires calculations and correct sling placement to keep the load balanced. You would also need to be taking into account wind and other factors that could suddenly change during a lift. As we've seen with Boeing's recent gently caress-up, sometimes letting the computer do everything because you don't trust the operator is just going to result in a bigger accident when you have a software or hardware glitch and it forces you into doing something dangerous.
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Apr 11, 2019 14:39
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Who needs calculations when you can just choke a sling on it and pick it up a foot and put it back down fifteen times moving the sling at random till it balances. One of the fun things about older friction cranes is generally they'll fall apart before they tip if you have the outriggers out and down.
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Apr 11, 2019 15:14
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Phanatic posted:Bridgecam caught some audio of the blast. In fact, on the news site that was linked earlier, their video included some footage from bridge cam. I had the audio off but there seemed to be a bit of debris flying around.
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Apr 11, 2019 15:32
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Moist von Lipwig posted:Knowing this was already getting scrapped and it doesn't seem like anyone got hurt allows this to be very satisfying. Yep, looks like they de-limed first then chopped it all down all very nicely. No accidentally crushing their house here. 
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Apr 11, 2019 19:21
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chitoryu12 posted:This famous crane accident I believe was a case of an inexperienced or distracted operator trying to lower a friction boom without proper use of the brakes: It also looks like the "heavy boom", the one that fell to begin with hit the boom of the one that was lowering it?. Was the operator supposed to be lowering the heavy boom while rolling his crane back? chitoryu12 posted:Also one thing with trying to make cranes automatically compensate for physics is that loads typically aren't symmetrical. There are classes and certifications for riggers because materials all have different densities and a load could be made up of multiple different materials in an asymmetric shape, which requires calculations and correct sling placement to keep the load balanced. You would also need to be taking into account wind and other factors that could suddenly change during a lift. One thing I always had a boner for when I was a kid was cranes, and watching them lift poo poo. I thought for a while it'd be dope to be a crane operator and clock that m4d $krilla they make, but then I learned things, and I'm like "gently caress that poo poo, too much liability if I gently caress up".
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Apr 11, 2019 22:33
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wesleywillis posted:It also looks like the "heavy boom", the one that fell to begin with hit the boom of the one that was lowering it?. Was the operator supposed to be lowering the heavy boom while rolling his crane back?
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Apr 11, 2019 23:22
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