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Florida Bridge Collapse

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Comments

  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,519
    Chris. You can do all the academic, armchair forensics you want, crazy, cheap & stupid was in vogue 150 years ago, and it's for sale today. Mad Dog
    Consulting by Mad Dog & Matt Jr.
    Solid_Fuel_Man
  • ChrisJ
    ChrisJ Member Posts: 16,316
    Mad Dog said:

    Chris: I'm glad you so readily embrace RADICALLY new technology. Would your great grandpappy put the fambly in a horse drawn coach with no hack driver? Mad Dog

    My great grandfather put the family in a car after growing up around horses.

    Kind of not getting your point.


    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,519
    Driverless horse drawn carriage or Car? Dumb then & now, no? Mad Dog
    Consulting by Mad Dog & Matt Jr.
  • Jamie Hall
    Jamie Hall Member Posts: 24,863
    What I see in that dash cam video may be very misleading -- but I see the first failure being a compression failure in the top chord at or very near the point where the first main diagonal comes in. Then a bending failure in the bottom chord, of course.

    Going to be interesting to read the complete investigation on this one...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Zman
    Zman Member Posts: 7,611
    Mad Dog said:

    Driverless horse drawn carriage or Car? Dumb then & now, no? Mad Dog

    Kinda depends on the horse :)
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Gordy
    Gordy Member Posts: 9,546
    as of now the smoking gun.......

    Did the dag bar yield? Did the threads strip when tightening? Did the worker forget lefty Lucy, righty tighty? With something like this a quarter turn could be 5000 foot pounds under load.


  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,519
    Ha ha. Yup Silver, Scout, Mr Ed, The Black Stallion, Misty of Chincoteague, Flicka, Trigger
    Or most old time delivery horses who had a regular route would be more trustworthy than a computer and sensors! Makes horse-sense to me! Mad Dog
    Consulting by Mad Dog & Matt Jr.
    Mark Eatherton
  • BobC
    BobC Member Posts: 5,502
    From what I've read if the torsion rod was not even finger tight then the rod had already been subjected to more force than it can handle and attempts to tighten it would cause it to fail further. I believe the fault lies with improper placement of the supports while the segment was being moved into place.
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
  • ratio
    ratio Member Posts: 3,791
    We'll see if the 'guilty party' will be the last guy to touch it, or the first guy who should have caught it.
  • Gordy
    Gordy Member Posts: 9,546
    edited March 2018
    This video I like. He does a good job of explains what happened to the PT rod. It has some profanity so if that bothers you do not view it. It’s on the mark. The PT rod was near yielding when tightening. Then it yielded. The question is now was it material deficiency, improper placement of the mobile dollies which was not per plan yet permission was given, or improper cribbing of the bridge on the dollies. Steel plates were to be used. Which wasn’t the case.

    I should not this is the second video he produced as more information became available,
    https://youtu.be/KtiTm2dKLgU
    Mad Dog_2

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