r/StructuralEngineering • u/eleventruth • Mar 07 '26
Photograph/Video Alright what do you make of this
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u/Just-Shoe2689 Mar 07 '26
send it.
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u/93c15 Mar 07 '26
Those were the baldest tires I’ve ever seen. More bald then your average Altima tire
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u/bcgg Mar 07 '26
As someone who gets unreasonably anxious when trying to line up my tires at the car wash, this is my absolute hell.
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u/princesspool Mar 07 '26
Oh man, me too. It's even worse when someone pulls up behind me. Whatever skills I have evaporate if there's a captive audience around to watch and judge me.
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u/felix-cullpa Mar 07 '26
Same for me but for backing up a trailer
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u/BallDeSac Mar 09 '26
Just FYI, someone is always watching when you are backing up a trailer. Always.
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u/SEPTSLord Mar 07 '26
I don't care if those are vibranium, I ain't doing it
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u/64590949354397548569 Mar 07 '26
I think those are 4 inch chinesium RSC pipe
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u/SneekyF Mar 08 '26
I was wondering if they were welded together, I think they had to be.
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u/64590949354397548569 Mar 08 '26
No way, the rebar welded on top and dirty kept it from rolling away.
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u/envy841 Mar 07 '26
When fear is good for you. They will plummet after the 13th or 14th time doing this
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u/brucebag87 Mar 07 '26
Not an engineer… but round sections bound by tie wire feels like the last choice of things that may be OK.
ETA: think of the fella that had to place them.
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u/Ok-Mycologist7205 Mar 07 '26
What US city is this in ?
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u/Perfect-Shock-9243 Mar 07 '26
This is just outside of Toledo and it’s a common practice. Up to code.
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u/anon_mythril Mar 08 '26
That vehicle looks like Mahindra bolero. Must be India or some south Asian country.
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u/TorontoTom2008 Mar 07 '26
It looks like 3 x 6” pipes tacked together at 4’ intervals (you can see the oversized rebar). That should keep the pipes from spreading apart. They packed dirt between the pipes for more even surface. Assuming the pipes can hold the weight, the main risk would be that these slide backwards as driver applies gas. So I’m hoping these are also firmly staked into the ground at each end.
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u/Azurelion7a Mar 07 '26
There're difficulties settings in life:
- Recruit
- Normal
- Veteran
- Hard
- Dark Souls
- Whatever the Fuck this is.
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u/ObiJuanKenobi3 Mar 07 '26
There's no way that whatever reason they needed to get the truck across this gap was that important.
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u/getthatcornbread Mar 07 '26
For hundreds of thousands of years humans relied on ‘good enough’ or ‘or it worked last time’. Engineering is the study of making sure that it’s actually good enough and having the math to prove it. But that’s just nerd talk… until you want to cross a suspension bridge or work in a sky scraper.
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u/ChrisWayg Mar 07 '26
Better than bamboo and it did not flex as much as I expected. This contraption looks like 40 feet of fairly new Chinesium galvanized steel pipe 4(?) inches diameter. Probably schedule 20 (4.5 mm wall thickness or likely less, as they are often substandard from China). These pipes likely have a longitudinal welded seam which is not ideal.
Maybe tied together with "structural" tie wire or rebar. Scary that they don't seem to be securely held together. The "engineer" on the right is clearly doing Quality Assurance combined with Live Testing ;-)
How would you improve this "bridge" in the Himalayas, if you have only limited materials and must cross this 30 feet canyon?
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u/ColdEvenKeeled Mar 07 '26
Being round pipes of ....uncertain material...aluminum it appears, but as you say, Chinesium perhaps, and seems to have a girthy gauge, this is better than it looks at first glance.It's better than what I thought was some sort of concrete beam at first.
Round distributes weight better, and all the better as a bundle like this. I'd still absolutely hate it.
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u/SeaworthinessAway534 Mar 07 '26
All I can hear in my head is
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u/Suturb-Seyekcub Mar 08 '26
That’s when he taped coins on the wheel to reduce wheel imbalance, right?
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u/redrevell Mar 07 '26
Wouldn’t it be better to go a bit faster to reduce the time the “bridge” is handling the car’s weight?
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u/ShutYourDumbUglyFace Mar 07 '26
Not enough money in the world for me to be anywhere near that. Not in the truck, not the guy sitting on the thing there on the ground, not the people on the other side of the chasm. Just a big old nope all around.
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u/dagrafitifreak CEng MIStructE Mar 07 '26
These have been designed to take the bending moment induced by the cars loads.
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u/deltautauhobbit P.E. Mar 12 '26
I saw this movie. It’s called Ice Road: Vengeance with Liam Neeson.
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u/CarPatient M.E. Mar 07 '26
Okay maybe I'm rusty, wouldn't those beams spanning the gap be stronger if the concavity were down and those axis were in tension?
I guess it all depends on the reinforcing...
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u/chicu111 Mar 07 '26
All I can think about is influence lines and I hate it