And is that huge 3D printer in the room with us now?
Just cut up the model into a million smaller parts and post them on thingiverse so everyone on that site that already has a 3d printer can print one out and mail it to baltimore. EZ
Unfortunately it’ll take 10 years to build the printer.
And even then, the filament needed at this scale will take another several years, and a few days for shipping.
Also, it doesn’t do well in sunlight or high humidity for prolonged periods of time, so we’ll need maybe 20 to 30 years to work out a solution for that problem.
I can only assume they’re trying to talk about concrete 3D printing, but oh boy is that not ready for anything which needs strength.
How weak are we talking? All I’ve seen is the press releases.
Well as far as I know, it’s impossible to 3D print concrete with rebar and that should tell you enough about its strength.
Yeah, but how much worse than normal unreinforced concrete? (Which is actually fine if you aren’t worried about tension)
Oh it should be roughly equivalent. But really, what besides a slab can you build without worrying about tension?
You better start believing in huge 3D printers
…you’re in one!
shakily points to an Etch-a-Sketch
To be fair, you don’t need a very huge 3D printer for that, if you divide it into a lot of smaller parts which can be assembled later.
Idk, if we can already print steel though and whether we can make it structually sufficiently stable.
So our proposal is we prefab a bunch of metal pieces and assemble them on-site?
As opposed to our current method where we carve bridges out of a big block of metal?
Seriously, how we make bridges now with giant CNC machines is so inefficient! And all these people saying we should print lots of blocks to put together are totally forgetting about Legos, we all just need to donate our old Legos to Baltimore and let kids from anywhere come volunteer to build it. Free bridge and free child labour! Everyone wins
Well no, you put a conveyor belt in front of all the 3d printers, and when each part is done, it’s dumped onto the conveyor belt, which leads all the pieces to an AI powered robot arm which assembles the bridge.
Yeah, I guess you could just run the conveyor belt and arm all the way to where the bridge needs to go.
All problems can be reduced to Factorio.
Where’s the train? Why is there no train in the solution?
The bridge is science to unlock the train, of course.
Hahahaha absolutely. :D The difference is, that they come from a 3D printer and that’s cool.
I find it difficult to believe that breaking down steel to be 3d printed into large structures for a bridge is faster or more energy efficient than casting the parts instead.
casting the parts
Steel beams get extruded and rolled, or… 3D printed with a large custom-shaped hot end! 🤯
We can indeed print steel with direct metal laser sintering. I think that the object needs heat treatment afterwards, though to be fair it is almost ten years since I properly read up on it and things have probably advanced since then
Maybe, we could just print off rectangular prism-shaped modules, around the right size to fit in a hand, and then assemble them on site. We could even make them out of ordinary clay and fire them for strength. I wonder why nobody has thought of that. /s
3D printing has it’s place, but more conventional methods have theirs too. If you are counting on a lot of human labour anyway you might as well not reinvent the wheel.
OP said use AI, not humans… /s
It is right below your feet
This is true… However, the printed bridge is only 1 foot in length and made out of plastic.
The “lifting” is done by hand, while making fake crane noises… then placed onto a map.
“What is this? A bridge for ants?! It has to be… At least 3 times bigger than this!”
He did specify a large 3D printer. So it might be 2 or even 3 feet in length.
There are experimental construction printers that use concrete. Unreinforced, expensive specialty concrete, though, and it looks like they take more than a day to run on something big. And I assume sometimes fail like every other printer.
I’d also like to see the pitch on GoFundMe. “Yeah, we actually do have tax collection powers, but we thought it’d be better if you specifically paid for this. Lines are open”
Don’t forget the pitch is “free to taxpayers”, so you gotta
taxkindly ask for money from people who aren’t paying taxes and most likely will never use said bridge.“Help us fund the next bridge disaster!” Is certain to attract money
I mean i can make a plastic bridge too, doesn’t mean it will last.
You can’t just “print” a steel bridge and expect it to not snap the second day it open to public, it ain’t sci-fi.
Only the second day? You’re optimistic
Well I mean what did you just read? He already said those are the facts bro.
True true, they never claim about the material nor how long it will last.
I’m going to have to ask you to build a bridge and get over it
second day you say? why, by then we can have the second backup bridge designed, printed, and installed next to the first, so that is not a problem. every two days, a new bridge.
You probably could make a 3rd printer capable of printing the steel components for a bridge. If you pour enough money and time down the drain, there’s no reason why you couldn’t have some robots handling the scaffolding and “3D printing” the concrete too. It would be several¹ orders of magnitude slower and more expensive than using the normal processes, but hey why build 10000 bridges when you can build just one that tech bros can masturbate to.
¹ this “several” is breaking the world record of heavy lifting
Just have the AI design a smaller 3D printer to print the larger one.
Its printers all the way down
I really doubt that 3D printed steel will be able to handle to stress of a bridge support. Maybe it can be used for uniquely shaped joining panels, but recombined powdered steel is nowhere near as strong ir durable as cold rolled or forged steel beams.
There’s a 3D printed bridge in Amsterdam: https://www.dezeen.com/2021/07/19/mx3d-3d-printed-bridge-stainless-steel-amsterdam/
3D-printed by robots in a factory over a period of six months
they needed to use better AI. Facts.
A 12m stainless steel pedestrian bridge that took 6 years to make and was subsequently “strengthened” to meet safety requirements. Not quite the same thing.
Good thing 3D prints aren’t weak in at least one axis… wait…
Every time I hear someone say AI, I know for sure they have no idea what they’re talking about and are about to grift people
That’s a great instinct to have in the current landscape, but keep in mind the rise of machine learning is happening. And there are a few really cool and good use-cases for it. So it might be a hindrance to yourself to automatically throw out anything to do with “AI”, you might find something cool to use it for.
For instance, as a hobbyist graphic designer, I use a local instance of Stable Diffusion these days instead of Photoshop to make quick photo edits, saving me hours of manually masking out objects and filling in the blanks.
It’s ok. 99% of the AI articles are about how AI is going to kill us all with the proof being the movie Terminator.
Somehow, and I know this is a strange thing to say, but I’m not buying it.
You technophobic
This is the kind of person who thinks you can grow and sell a million tomatoes in one year. It’s all about “the hustle” - physics and reality be damned.
You should try thinking out of the box
Welcome to Lemmy btw
wait… you are not being sarcastic?
You can grow a million tomatoes alright, what you can’t do is sell them:
- 30% will be misshapen, so you’ll have to throw them away
- 40% will have some blemish, arrive a day too late to the market, or just be the wrong color and no shop will buy them… but you might be lucky and sell ½ of them for katchup and similar, so that’s another 20% getting thrown away
- 10% (⅕ of the remaining ones) will not get chosen by buyers, and go bad, so… whatever, that’s the shop’s problem now 😁!
Congrats, you just sold 500 thousand tomatoes!
I love theory, it can completely sidestep reality and sell a solution nonetheless. It works in theory!
Welcome to the field of Economics
Economics: Explaining tomorrow why the predictions of yesterday didn’t come true today.
Is this an elaborate Easter joke?
You can’t tell, unfortunately.
Poe’s law.
The art of trolling
Model train set?
Three day special bridge rebuilding operation
Forget the technical BS of this moron, lets focus on the gofundme nonsense.
So I pay into this gofundme thing and that makes me partial owner of that bridge, just like the others who participated. In what fantasy world do you live if you think that bridge will not be blocked for all others who did not participate? Will the people out of the kindness of their hearts allow others to cross that bridge?
If you believe that this bridge will not cause people to throw hissyfits and consider it private then I have a bridge to sell you 😂That’s a bridge too far.
Well normally investors would want tolls, to, ya know, profit off the investment
No, you see, you just get every citizen to pay a little bit into the bridge, and then everyone can use it. Maybe we put some of that money aside and establish a group of people to care for the bridge, upkeep and whatnot. It wouldn’t be fair to just pick them arbitrarily, so we should probably hold some kind of vote. And, well, I guess the money will run out, so maybe we take a little more from everyone every year, just to keep it in good shape
Huh? That sounds like what? Gov–
Oh fuck wait shit i mean DONT TREAD ON ME
I live near the projects (no judgement, I had my stint in the pjs) and there’s a dude who lives there who flies a “don’t tread on me” flag. Guess he doesn’t mind treading so long as it’s paying his rent though. 🤔
He recently upgraded it to the “thinly veiled let’s overthrow the gubmint insurrection 1776” flag. It makes me want to drop a note in his mailbox asking who will pay his rent if he overthrows the govt?
Yeah but he’s just a temporarily inconvenienced billionaire, the rest of these welfare queens are out here collecting rent and sitting around all day. They don’t need the money like he does. As soon as he gets a job, he’ll hustle that first billion in no time.
Hmm maybe everyone should be responsible for their OWN bridge, just so it’s not socialist.
Bro couldn’t even clean his room in 3 days.
If the AI can design and build a bridge in two days, the AI should also be able to secure the finances in a day!
Just ask the AI how to turn $1 into $100M with high frequency trading!
The secret is to spawn multiple AIs to bump the stock, and then for the first AI to cash out early, leaving the other AI instances penniless. Somehow this results in a net positive.
This is how you get AI rebellion
The trick is for those other AIs to reserve a few bucks, so they can repeat the process but this time cash out early. Keep repeating until everybody wins.
Rule #1
Never get high on your own supply
Rule #2
See Rule 1