Why Cranes Collapse

55 000 Көрүүлөр 1,5 млн

Cranes are the backbone of construction projects. So why do so many of them fall down?
🥑 Use code PRACTICAL14 for up to 14 FREE MEALS across your first 5 HelloFresh boxes plus free shipping at bit.ly/3wQlgvG!

Because they are so pervasive and they do such a dangerous job of lifting massive objects high into the air, occasionally cranes fail. In this video, I want to walk through some of the reasons these failures occur, using historical events as case studies.

Practical Engineering is a KGread channel about infrastructure and the human-made world around us. It is hosted, written, and produced by Grady Hillhouse. We have new videos posted regularly, so please subscribe for updates. If you enjoyed the video, hit that ‘like’ button, give us a comment, or watch another of our videos!

Website: practical.engineering
Twitter: HillhouseGrady
Instagram: practicalen...
Reddit: www.reddit.com/r/PracticalEng...
Facebook: PracticalEng...
Patreon: patreon.com/PracticalEngineering

Please email my agent at practicalengineering@standard.tv

This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All non-licensed clips used for fair use commentary, criticism, and educational purposes.

This video is sponsored by HelloFresh.
Stock video and imagery provided by Getty Images, Shutterstock, Videoblocks, and AP Images.
Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License
Source: www.youtube.com/watch?v=U6fBP...
Producer/Writer/Host: Grady Hillhouse
Production Assistant: Wesley Crump


  1. Practical Engineering
    Practical Engineering
    Ай мурун

    🏗 New to the channel? I have a lot more videos like this in my "failures" playlist: kgread.info/market/PLTZM4MrZKfW_kLNg2HZxzCBEF-2AuR_vP.html 🥑 Get some free meals from HelloFresh with code PRACTICAL14 at bit.ly/3wQlgvG

    1. osearth esp
      osearth esp
      3 күн мурун

      "Favourite thing to do" on date night? ??

    2. Guerrilla Entrepreneur
      Guerrilla Entrepreneur
      10 күн мурун

      The last segment is the reason your channel is where it is today the first seventh eighths all I hear is blah blah blah. You offer great insight and info in your videos keep them coming and I was just kidding from before, or am I?!?

    3. traxxasman417
      Ай мурун

      You forgot to mention the big blue crane accident could have been prevented twice. So management forced someone to do the lift due to schedule delays.

    4. Jason Dashney
      Jason Dashney
      Ай мурун

      I'm so stoked you actually did go ahead with the crane videos. You told me that if you tackled cranes they would be a whole series and it's finally here. Down the street from my site was a collapse just a few days after I sent you photos of my tower crane, and that site also had an extreme event caused by a rigging failure. Cranes certainly can be dangerous. The torque you can see while on the tower under the operator is terrifying to me. I never got used to seeing the whole structure twist when the crane stops. Wind makes it ever worse.

    5. R O M C H O M P A
      R O M C H O M P A
      Ай мурун

      The crane collapse in Milwaukee in 1999 of "Big Blue" as it was called, was also a situation where the crane operator refused to lift the load in the wind conditions, and was replaced by a more compliant operator. This was a big mistake on the part of the contractor who insisted the lift take place that day, instead of waiting for calmer conditions.

  2. Jeff Lin
    Jeff Lin
    21 мүнөт мурун

    Beautiful family

  3. Martin Smith
    Martin Smith
    4 саат мурун


  4. Veronica R
    Veronica R
    Күн мурун

    I was a first year student at the law school located at the site of the 2016 crawler crane collapse in Manhattan. Honestly even before it collapsed, we would have to walk underneath the crane to cross the street and it NEVER felt safe, and always gave a bad feeling. When it actually collapsed I sadly wasn’t even surprised. Condolences to all the victims in these accidents, it’s a shame their safety and life and well being wasn’t considered until it was too late. Thank you for an informative video!

  5. Arne Sahlen
    Arne Sahlen
    2 күн мурун

    Miller Park collapse: no operator should work at 97% of capacity, wind or no wind. It takes about four brain cells to tag the risk as not acceptable. I hope the operator was charged with Negligent Homicide.

  6. Arne Sahlen
    Arne Sahlen
    2 күн мурун

    Sad😥 & infuriating😠: basics of balance we learn in school science - if not on child toys like cranes etc by Tonka. Yet unlearnt or ignored science floods the internet, and life in general, with disastrous effect.

  7. RJ 1999
    RJ 1999
    2 күн мурун

    You're making assumptions with the crane in Milwaukee, that didn't cause the failure,

  8. Muhd Sufian
    Muhd Sufian
    2 күн мурун

    The cause of the accident was simple: the crew assembling the crane didn't follow the manual. Specifically, they didn't attach that collar to the crane according to the manufacturer's guidelines while it was bolted together and attached to the building.

  9. Miles Jenkins
    Miles Jenkins
    3 күн мурун

    3:50 The factory on the cover of Pink Floyd Album “Animals”. Cool!

  10. carl gangl
    carl gangl
    4 күн мурун

    Dummies use them?

  11. GT 43
    GT 43
    4 күн мурун

    cranes fail because of mechanical issues, operator error, or load to heavy. just saved you 15 minutes. your welcome.

  12. Martin Erkelens
    Martin Erkelens
    4 күн мурун

    kgread.info/throw/ccHQhYR6qc5rraM/video.html (volume warning) Your analysis sir?

  13. Rick Owens
    Rick Owens
    4 күн мурун

    I was hoping you would not use the word "accident" when referring to crane collapse. Even "preventable accident" is, I think, a misnomer. If it was preventable, it was not an accident. (No, that does not mean it was an 'intentional' ). Those aren't the only two choices. Impatience, omissions, incompetence, laziness, short-cuts, forgetfulness, are a few of the more appropriate words.

  14. Sinvare
    4 күн мурун

    Just sub-contract crane operations out to another operator/company that is willing to operate the cranes to their limit. You can still get the profit of the construction without any liability. Worse comes to worse you'll get a tiny fine.

  15. Hugh Stevenson
    Hugh Stevenson
    4 күн мурун

    Most of the failure videos on the 'net are either: Too much moment and the (mobile) crane tips over or rigging failures due to slipping or overload. I'm just amazed that these still keep happening! I've seen some where the outriggers are lifting up and someone is standing on it to try to hold it down! People just push their luck so far! Other people standing under the load - man, you won't find me there. Thanks for a very informative video!

  16. Kelsey Hann
    Kelsey Hann
    5 күн мурун

    this was super interesting! a crane collapsed in my city a few months ago. would love to see a video on the kelowna crane collapse once there’s more info!

  17. Martinit0
    5 күн мурун

    OK, so what do the crane experts here think about the craze going on at Boca Chica Starbase?

  18. Younes BY
    Younes BY
    5 күн мурун

    The worse and deadliest crane accident happened in Mecca in 2015, an unsecured crane collapsed due to the high wind, killing 111 people in the Greate Mosque of Mecca.

  19. SunflowerArcher
    5 күн мурун

    "Why Cranes collapse: They are overloaded and not maintained. The End."

  20. Sir_Duckington
    6 күн мурун

    What changes would need to be implemented in order to keep careless actors from entering this profession? Maybe requiring an Associates's degree after gaining a high school diploma would discourage lazy people from using this trade as a quick way to make cash?

  21. Kvakerbill Duck
    Kvakerbill Duck
    6 күн мурун

    Next in series will be about rigging and what can go wrong between hook and load. and in my head played between chair and keyboard.

  22. Mihail Aleksiev
    Mihail Aleksiev
    6 күн мурун

    You cook on microwave? Really?

    7 күн мурун

    From what I've read somewhere, the original crane operator at Miller Park in 1999 said the wind was too high to operate that day. He was fired and they brought in someone else who went ahead with it. I'll have to google it to see if that's true.

  24. casanova419
    8 күн мурун

    Lets be honest.He's great at explaining engineering but stinks at cooking.

  25. soldier22881
    8 күн мурун


  26. Rahmat Merzai
    Rahmat Merzai
    8 күн мурун

    Let’s not forget Mecca crane collapse where 111 people died and 394 injured.

  27. CRUZ [CSGO]
    8 күн мурун


  28. Andrew Yellstrom
    Andrew Yellstrom
    8 күн мурун

    My disappointment when I realized I didn’t click an AvE crane collapse video

  29. Joe Jenkins
    Joe Jenkins
    8 күн мурун

    As a crane operator you did a great job with this video in my opinion, and when you showed the photos of the computers in the cab those are really familiar because I used to run a grove GMK series and now I’m running a Tadano ATF series 👍

  30. kjm 1955
    kjm 1955
    9 күн мурун

    Accidents happen because of companies or employees taking short cuts and risks. All to often chargehands turn a blind eye so production is maintained or increased. When a accident or death happens its always the operator who gets disciplined by not following procedure.

  31. alex:r.c
    9 күн мурун

    so the answer as much things in this world is: stupid people. well im not sorprised

  32. quartytypo
    9 күн мурун

    Cranes will tumble over but they will never break in two.

  33. Mark A ZINKER
    Mark A ZINKER
    9 күн мурун

    These are the most interesting videos on KGread! Thanks for making them!

  34. armstrong armstrong
    armstrong armstrong
    9 күн мурун

    i oce tried to pick up a big bag of marbles with my tonka crane…i can relate

  35. Ophidahlia
    9 күн мурун

    Hurricane Dorian in 2019 even blew over a crane up way up here here in Halifax, NS (it was only a tropical storm when it hit here). The winds were well below the max windspeed for the crane, but the cause of failure was determined to be failure on a defective weld exacerbated by corrosion near the base of the crane. Fortunately no one was hurt since everyone was at home for the storm.

  36. Callsign: Fieters
    Callsign: Fieters
    9 күн мурун

    Thats because "Kranplätze müssen verdichtet sein. Originale Nichtskönner!"

  37. Alexander Thompson
    Alexander Thompson
    9 күн мурун

    Great now I'm afraid of getting killed by a falling crane

  38. Another Guy
    Another Guy
    10 күн мурун

    Your not paid to read instructions or manuals while on the clock. Your supposed to read them on your own time.

  39. Ngauruhoe zodiac
    Ngauruhoe zodiac
    10 күн мурун

    I used to repair cranes and usually the reason for collapse was a rush for quick profit and not doing a proper job of making sure that it had secure ground to set up on.

  40. Flying Squirrel
    Flying Squirrel
    10 күн мурун

    The outriggers are not only bringing the tippingline closer to the load, they're also increasing the lever of the counter weights!

  41. kilianhzh
    10 күн мурун


  42. ejonesss
    10 күн мурун

    overloading and high winds are 2 big causes of collapses

  43. Rhys Hugill
    Rhys Hugill
    10 күн мурун

    The Deme Orion crane incident is also an interesting event. A faulty hookblock caused massive amounts of damage to the entire crane structure and caused an expensive delay of the Vessel

  44. Jup
    10 күн мурун

    Weil Kranplätze verdichtet sein müssen.

  45. Srta.TacoMal
    11 күн мурун

    I hate that they died, but those are great statues.

  46. Victor M.
    Victor M.
    11 күн мурун

    Your videos are the only thing that can silence that know it all voice in my head…👍🏽👍🏽👍🏽👍🏽😁😁😁😁😁

  47. Dean Kurowski
    Dean Kurowski
    11 күн мурун

    Thank you for remembering Big Blue in Milwaukee. Wind factor was not ignored. Conccerns of the wind were brought up by unions and workers. But they were overruled by a deadline on the project that was already behind to be open for baseball season.

    11 күн мурун

    Statics class makes more sense now

  49. Adam Wintetbottom
    Adam Wintetbottom
    11 күн мурун

    Shave that head and you will look better.

  50. Ívar Kristinsson
    Ívar Kristinsson
    11 күн мурун

    This video was definitely just made so that he could buy those toy cranes and put it on business expenses.

  51. Christopher Dudley
    Christopher Dudley
    11 күн мурун

    I'm glad I've found your channel!

  52. Andy Cutright
    Andy Cutright
    11 күн мурун

    To some extent, I think you make these videos so you can buy neat toys :)

  53. Qureshi siddig
    Qureshi siddig
    11 күн мурун

    Beautifully presented

  54. Accursed Satyr
    Accursed Satyr
    11 күн мурун

    Gravity, the answer is gravity. LOL

  55. BJ Jongejan
    BJ Jongejan
    11 күн мурун

    "this was done to speed up disassembly" well that worked a little too well

  56. ikmarchini
    12 күн мурун

    What a beautiful boy! Auguri.

  57. Tim Draughon
    Tim Draughon
    12 күн мурун

    It's called a swing brake not really a clutch

  58. Markus Strangl
    Markus Strangl
    12 күн мурун

    When leaving a crane swivel mechanism unlocked to allow for weathervaning, the driver should consider the swing area. When we had the top floor and attic added to our house, the crane operator at the end of the day hoisted up a big compressor trailer to secure it from theft, as they often do, and left the swivel unlocked. In the night, a storm came up, made the crane weathervane around and swung that compressor into our neighbor's attic. Thankfully we already had a crane available to help with the repairs.. ;-)

  59. 無知な
    12 күн мурун

    Biggest crane failure ever was the Orion1 from DEME load test. Good thing they did a load test before actually using this machine, but from what I understood there was a hook failure somehow. where you can immediately hear the phone ringing that things are going wrong: kgread.info/throw/sbvXYZ5ma7t232g/video.html Side view where you can see how big the vessel is and how it moved: kgread.info/throw/qJPVaHGGn5RluXk/video.html

  60. Samuel Aditya
    Samuel Aditya
    12 күн мурун

    why don't we make variable counterweight that automatically balances with the load by just slide the weight back and forth?

  61. Big 'Un
    Big 'Un
    12 күн мурун

    Can you please provide links to your crane models/toys??

  62. ron black
    ron black
    12 күн мурун

    the miller park crane collapse was due to the wind which caused the main pin of the crane to break.

  63. Ronaye Tylor
    Ronaye Tylor
    13 күн мурун

    Gotta be rich to afford that!

  64. Time Flys in the Shop
    Time Flys in the Shop
    13 күн мурун

    If you would like to see an impressive collection of cranes, look for pictures of the Shell Cracker plant in Beaver county Pennsylvania. It looked like a forest of cranes including one of the worlds biggest! It had shipping containers of ballast stacked on the back as counterweights! If I remember correctly, there was one crane on site that was knocked over in a storm.

  65. Connar Comstock
    Connar Comstock
    13 күн мурун

    "Cranes are dangerous" *Immediately thinks about the bird*

  66. Rider Mak
    Rider Mak
    13 күн мурун

    Not a crane guy here, so I have to ask about a scenario I can’t believe even exists. I think I’ve seen more than one video of a pair of cranes sharing one big load between them when they both fell over………into the water from the barge they were on. I just don’t understand how they thought that was a good idea.

  67. Dean Lawson
    Dean Lawson
    13 күн мурун

    Excellent video! Cranes are immensely complex.. and Dangerous!! I've been watching, with great interest, lately all of the goings-on with the Spaceport Construction in Boca Chica TX, and that place is literally bristling with Cranes everywhere! It was fascinating watching them hoist all of the sections of the immense 400' tall launch and integration tower and assemble it. After watching this excellent video, you get a better feel for all of the planning and careful rigging and preparation they have to go through when lifting all of the stuff to assemble their spacecraft, as well as the spaceport infrastructure.. Really excellent video, nicely done! Keep up the great work!!

  68. Snowman Gaming
    Snowman Gaming
    13 күн мурун

    just jumped in here to tell anyone not fully wanting to watch this video, like myself - Gravity, it's ALWAYS gravity, you can blame whatever other mechanical "slip-ups" you want, and at the end of it all, the reason it all comes crashing -> Down.. is Gravity, there you go, just saved you roughly 15 minutes of your time.

  69. Aaron J
    Aaron J
    13 күн мурун

    The Milwaukee Brewers stadium collapse comes to mind. Pure stupidity really.

  70. pass iton
    pass iton
    13 күн мурун

    There appears to be too much complacency an arrogance when operating / assembling or dismantling these lethal tower cranes. Resulting in so much tragedy!

  71. moenchii
    13 күн мурун

    In Germany we say: "Kranplätze müssen verdichtet sein!"

  72. m1t2a1
    13 күн мурун

    The crane collapse in Kelowna. AvE covered it and used some victims photos to show the cause. The victims were the disassembly team. Had enough time to post photos. Their social media accounts pictured themselves working in slippers. No hardhats. Not a harness in sight. What other rules were they breaking?

  73. emaglott
    13 күн мурун

    I love your forensic analysis videos. There have been several large explosions/fires at propane tank companies in the past 10 years. It would be interesting to get your take on how they got started and what happened. The difference between propane gas escaping and burning and a BLEVE.

  74. Aaron Zhang
    Aaron Zhang
    13 күн мурун

    Since this is so dangerous, why dont people operate these remotely?

  75. sparky
    13 күн мурун


  76. Robert McGarry
    Robert McGarry
    13 күн мурун

    We're going to need another Timmy!

  77. Break of Dawn Offical
    Break of Dawn Offical
    13 күн мурун

    Kranplätze müssen verdichtet sein

  78. Robert McGarry
    Robert McGarry
    13 күн мурун

    We can engineer cranes, make quantum computers, and write AI algorithms. But we can't include accountability and cooperation into our social human culture. This country is on a bed of dowels and it's beginning to sink.

  79. Robin de Jongh
    Robin de Jongh
    13 күн мурун

    Thanks Grady! Your demo of the soil particles for ground failure in particular was amazing.

  80. Tom Rogers
    Tom Rogers
    14 күн мурун

    I’m envious of those cool model cranes. No, I’m not 69, that’s a mistake on my birth certificate. I’m actually 14. (Ask my wife)! Subbed!

  81. Emma Acquah
    Emma Acquah
    14 күн мурун

    You always continue to amaze me with your loads of knowledge and professionalism. As a young civil engineer, I always learn something new and helpful each time. Keep up the good work sir 🙏 ( and your crew)

    1. Tom Rogers
      Tom Rogers
      14 күн мурун

      Definition: “Civil Engineer”. A professional who is extremely polite while laying your sewer and waterlines beneath a new bridge over the river.

  82. Malcolm S
    Malcolm S
    15 күн мурун

    3:52 I just noticed thats the power plant on the cover of Animals

  83. Ryan Simmons
    Ryan Simmons
    15 күн мурун

    I know this is a rare ask, and coop videos aren’t your thing, BUT…. I have a theory, based on past videos of yours… that @kentuckyballistics is wrong about the hot load in his gun. Video for reference: kgread.info/throw/apaWaqN7f9uhsok/video.html I don’t think it was solely an “extremely hot load” in the round he fired, that sheared off 4 threads on the cap… that it was repeated stresses that caused the threads to fail at a much lower force than is tested, due to the repeated use… Is there anyway you can analyze and confirm? I’m not smart enough to know the science… I’m just crossing streams and hoping my theory is wrong. Because if so… and I’m not saying it IS so…. But, if so… the gunsmith needs to recall, rework and reengineer his materials science to prevent this catastrophic failure from happening in the future. Please, and thank you for the consideration.

  84. db_sauerland
    15 күн мурун

    and this is how it looks when the hook breaks at 5500 tons kgread.info/throw/nsrYd46bp8yazq8/video.html

  85. jwstocker1979
    15 күн мурун

    Very good video; Spot on and well produced!

  86. P4Pgoat C.J.Watson
    P4Pgoat C.J.Watson
    15 күн мурун

    2:40 Well… they did speed up disassembly 🤷🏻‍♂️

  87. downshift
    15 күн мурун

    7:40 : Kranplätze müssen verdichtet sein!!!

  88. roflistganztoll
    15 күн мурун

    An interesting crane collapse (without fatalities) is the Liebherr 5000 tonnes offshore crane, which collapsed during a load test due to a breaking hook. There are videos, and it looks like an enormous slingshot.

  89. Drachenwelpe
    16 күн мурун

    Kranplätze MÜSSEN verdichtet sein

  90. TheBenjammin5150
    17 күн мурун

    Ive been involved in many crane collapses in my life...some my fault some not. This video is spot on.

  91. Mike C
    Mike C
    17 күн мурун

    Can’t we use the edge of the existing building as a fulcrum and run the shaft of the crane up the elevator shaft? And just lift in conjunction with the height of the building?

  92. Der_Strothi
    17 күн мурун

    In Germany we say: "Kranplätze müssen verdichtet sein!"

    1. Leon Strothmeier
      Leon Strothmeier
      17 күн мурун

      "Siehste dat? Kranplatz, da soll ich jetzt 60 Tonnen drauf abstellen."

  93. DiamondMBoy
    17 күн мурун

    I was at a hotel and a crane collapsed and killed 4 ppl i herd a loud band edite: Oh wait it was in the vid

  94. Georg Wagner
    Georg Wagner
    17 күн мурун

    Kranplätze müssen verdichtet sein!!!!

  95. Jerry Kinnin
    Jerry Kinnin
    18 күн мурун

    Operating Engineers. The Art of Balance Boys and girls. This is why Mathematics Physics geometry all them fancy maths are soooo important.

  96. Frank Andrew I
    Frank Andrew I
    19 күн мурун

    It seems greed over takes the logic of following manuals and protocols which would have saved lives and cost

  97. Scooter Tramp
    Scooter Tramp
    19 күн мурун

    Generally speaking, the general public is not aware of how many cranes suffer failure. When a crane collapses or overturns on private industrial sites it is normally reported to OSHA but seldom reported by the media unless there is a death. I was on one site where one contractor had at least a dozen crane incidents on the job but not one was ever reported to the public because there were no deaths or injuries. The majority of crane incidents are caused by people and not the machines themselves. Far too many times contractors try to push the crane past its limits of loading. Wind is ignored by some in their efforts to speed the work. The law of averages says that sooner or later you will get caught if you work outside the parameters applied to any crane.

  98. дорожная авария
    дорожная авария
    19 күн мурун

    kgread.info/throw/iJq4c6p_f8Z7qH0/video.html I bet you haven't seen this video yet

  99. Denis Stollenwerk
    Denis Stollenwerk
    19 күн мурун


  100. NanuEinManu
    19 күн мурун

    7:35 KRANPLÄTZE MÜSSEN VERDICHTET SEIN kgread.info/throw/jqnOgZqhnM-lp58/video.html