The "cables" aren't really doing much here, by the look of things, since the central tower is ultimately just resting on the truss span; it looks like the main reason the final bridge passed the test was that the anchoring for the tower helped reinforce the center portion of the bottom to take the tensile strain better. From the first box-girder bridge onwards, the failing components were always the pins between the main beams on the bottom (the side bearing much more compressive stress); I'd expect that overlapping the beams more and using axles instead of pins would've improved performance.
Yes, l thought that too. Last one realy must be turned upside down, so it will become upside down suspension bridge. Or he just could prolong main tower to the ground)
Those frames were connected in straight lines, the construction would have been stronger if the frames were connected in an overlapping pattern, like how brick houses are made.
I agree. I'm nowhere near to a physics student, but all these bridges seemed to be built the same way, just with more and more added frames in straight lines. I don't think he understands how physics work and how force is distributed through design.
My civil engineering professor used to say: given enough time, money, and materials, anyone can build a bridge; only an engineer can build a bridge that just barely doesn't fall down.
Great video, fun to watch. If anyone can correct me, please do. I love to learn: I think your bridge design could be improved. Your last bridge, the cable stayed one, has a design flaw; that being that a traditional cable stayed bridge has pillars that are supposed to be load bearing. Instead of the center holding up the edges, you have the edges holding up the center, which favors a truss bridge or a through bridge. Having all that lego in the middle is really heavy, as well. But I'm not an engineer, and I loved watching your video. Just a suggestion.
A suspension bridge is the best idea in my opinion, back in middle school I had an engineering class as an elective, and there was this challenge to make the strongest bridge with just popsicle sticks and anything we brought that our teacher approved of, and I asked if I could bring some light rope, and he agreed, so me and my two friends made a suspension bridge, and we made some cross bearings for the (I forget the technical term) tower thing in the middle, and we won.
The only problem is that in this case. If the beams where ropes they would not do anything. Because the tower is the middle the ropes would experience compression force and as you know. Ropes are too good at compression forces
Not only this, I’m pretty sure he isn’t aware of any internal stress distribution (for instance, those horizontal beams are utterly useless due to the minimal axial moment) and only considers the whole thing as a rigid bar. But good content tho!
I believe that one way to reduce stress on the center point of the bridge would be braces that would have rested against the table edges. That way when more weight was added, these braces are more likely to take most of the load rather than the main span of the bridge itself.
You did NOT understand the priciples of suspension bridges. Kables have to be under pull not push. The pillars do not support the part, where they standing but the free hanging parts of the road, where the other ends of the cables are attached. If you want to support the middle of a bridge, you need to bould the pillars at the ends of the bridge and route the kables to the middle. Or simple build an arch bridge.
It's obviously possible, I was just here to see how it'd be accomplished. Unfortunately, barely any visual information is presented on how it worked. Would've been better to show exactly how each stage fixed the previous failure in detail.
6:42 you call THAT a pass? Technically it did hold 100kg but it was already beyond damaged and probably would have crashed within a few minutes. If you say that a bridge can carry up to 2t for example, you are saying that the bridge can transport up to 2t without risking damage. That might be a tall task for mere Lego constructions so it's fine if it's risking damage but it shouldn't show obvious signs of material failure I would say.
@@sovietunion8304 uh, no it's a joke. And I was joking about it. A KG is 2.2 pounds his goal as you saw was to make a bridge able to carry 100 KG, which is over 220 pounds. Look at all those Weights. Do you really think 10 of those Lego Cars weigh as much as a single 20 KG weight!??????
sorry im not the best at picking up jokes in text im also American so i have no idea how the metric systems works all i know is its base 10@@jamessilva1259
some really bad designs ... far too much build in parallel where it should have been truss geometry and ending up with a center pillar which isnt supported at its base is very silly. could have achieved the 100kg with far less and with much more style
Just kupchak national power people on see on getting on lurking on warking pitches doing industry taller Jack economic business news reports speak too industry 🤬🤥🤪😷🤭
Can we have a moment of silence for all the innocent technic pins that gave their lives in pursuit of this demo?
A lot were lost for the benefit of the video!
I’m Crying😢
Fr rip😢😢😢😢😢
And the sharks 😢
Of course we can. But only for the black ones, the blue ones diserved it
The "cables" aren't really doing much here, by the look of things, since the central tower is ultimately just resting on the truss span; it looks like the main reason the final bridge passed the test was that the anchoring for the tower helped reinforce the center portion of the bottom to take the tensile strain better.
From the first box-girder bridge onwards, the failing components were always the pins between the main beams on the bottom (the side bearing much more compressive stress); I'd expect that overlapping the beams more and using axles instead of pins would've improved performance.
It will be more effective upside down!
😢
Yes, l thought that too. Last one realy must be turned upside down, so it will become upside down suspension bridge. Or he just could prolong main tower to the ground)
Um what did you say
My thoughts exactly@@Arhange1790
Those frames were connected in straight lines, the construction would have been stronger if the frames were connected in an overlapping pattern, like how brick houses are made.
That last bridge makes no sense at all. It sould be supported at the center, not at the ends. The pylon and cables make no difference.
Finally someone who actually understands how basic physics works
If he used them as compression bars it would have worked but no
I agree. I'm nowhere near to a physics student, but all these bridges seemed to be built the same way, just with more and more added frames in straight lines. I don't think he understands how physics work and how force is distributed through design.
My civil engineering professor used to say: given enough time, money, and materials, anyone can build a bridge; only an engineer can build a bridge that just barely doesn't fall down.
Great video, fun to watch.
If anyone can correct me, please do. I love to learn:
I think your bridge design could be improved. Your last bridge, the cable stayed one, has a design flaw; that being that a traditional cable stayed bridge has pillars that are supposed to be load bearing. Instead of the center holding up the edges, you have the edges holding up the center, which favors a truss bridge or a through bridge. Having all that lego in the middle is really heavy, as well.
But I'm not an engineer, and I loved watching your video. Just a suggestion.
A suspension bridge is the best idea in my opinion, back in middle school I had an engineering class as an elective, and there was this challenge to make the strongest bridge with just popsicle sticks and anything we brought that our teacher approved of, and I asked if I could bring some light rope, and he agreed, so me and my two friends made a suspension bridge, and we made some cross bearings for the (I forget the technical term) tower thing in the middle, and we won.
The only problem is that in this case. If the beams where ropes they would not do anything. Because the tower is the middle the ropes would experience compression force and as you know. Ropes are too good at compression forces
Nope
Stack plates side wase and greate an H beam that wil be the stongest
OMG, the bridge's durability is admirable
IKEA table are incredibly strong !
The whole deck is made from square's, should have used triangles instead. Triangles are soooo much stronger
But triangles are not the strongest shape.
@@cavalierliberty6838it is tho
Not according to RCE
@@cavalierliberty6838 what is the strongest form then?
I love how you needed it to hold 100kg, for one little car.
Gotta get that factor of safety in!
That creaking. Never thought it would hold that weight.
Bro got weights from ww2. Really good and solid content keep it up
Ah thanks for the support!
A bridge has fallen into the river!
Quick!!!
Build a man to repair it!
6:44 lets give a applause on that bridge holding 101 kg while on life support
The side members usually give way first I noticed. Joins have point of failure
The "cables" can handle way more during tensile stress than during compressive stress.
So the bridge would be stronger if you flipped it upside down.
Not only this, I’m pretty sure he isn’t aware of any internal stress distribution (for instance, those horizontal beams are utterly useless due to the minimal axial moment) and only considers the whole thing as a rigid bar. But good content tho!
@@gary9793 Witn a 100Kg lego brigde you can handle 100Kg weight! Very impressive...
Theoretically most of us could stand on that?
Hey, absolutely! That was the aim! You’ll have to get on slowly and carefully though!
This should have 1m+ views
Came here from tiktok, I like your channel
I believe that one way to reduce stress on the center point of the bridge would be braces that would have rested against the table edges. That way when more weight was added, these braces are more likely to take most of the load rather than the main span of the bridge itself.
You did NOT understand the priciples of suspension bridges. Kables have to be under pull not push.
The pillars do not support the part, where they standing but the free hanging parts of the road, where the other ends of the cables are attached.
If you want to support the middle of a bridge, you need to bould the pillars at the ends of the bridge and route the kables to the middle. Or simple build an arch bridge.
XOOL!!! HOW ARE U NOT POPULAR!?!?!?!
Ik
Beautiful video thanks for sharing 😊"
No worries! I’m glad you enjoyed it!
Amazing!!!! Kind regards from Germany
Glad to hear you enjoyed it!
@@BuilditwithBricks yes of course, i really enjoy your great skills. So nice
You could make it a lot stronger and lighter by implementing trusses
I could stand on top of bridge 5 and it wouldn't break. I'm 20 years old. It's wild to think lego can be so strong
It's obviously possible, I was just here to see how it'd be accomplished. Unfortunately, barely any visual information is presented on how it worked. Would've been better to show exactly how each stage fixed the previous failure in detail.
Good that sharks are safe
Some guy stole this and posted it on tiktok
the innocent triple technic pins and double pins 😢 tehy gave there lives
I’ve got a broken parts bin that’s growing after every video!
the downstairs neighbour:
"what the hell they doing up there?"
Mother: Stop watching iPad ! It’s bad for you and you watching TH-camrs play games all day is rotting your brain!
What I’m watching:
I knew my upstairs neighbor was up to something 🤯
ive broken many of those technic pins myself
wouldve been stronger if you staggered the boxes and instead of the pillar at the middle, pillars of either side lifting the middle
I hope you got no neighbours in the appartement below you :D
found this vid reposted on tik tok with no credit, and decided to check out the original
Thank you - I appreciate that! Hope you find some other videos on my channel you enjoy!
6:42 you call THAT a pass?
Technically it did hold 100kg but it was already beyond damaged and probably would have crashed within a few minutes. If you say that a bridge can carry up to 2t for example, you are saying that the bridge can transport up to 2t without risking damage. That might be a tall task for mere Lego constructions so it's fine if it's risking damage but it shouldn't show obvious signs of material failure I would say.
Plates would help lock prices together
Crazy
4:00 yeah the car aint gonna make it
I don’t like the cracking noise when they put the weights on.
Did anyone come from that one tik tok vid that dosent have a second part?
🙋
Yea it can!
huh, so its like building a kilotone bridge for 100 kg, totally not overkill
Gotta have a good factor of safety……
nah the poor sharks
First comment after 6 minutes, I’m sorry, so much effort, but no one is active😢😢😢
Stagger the joints like a brick wall
RIP to all reported injuries…
How many 5x7 framas did you have? And how much $$$ they cost
I’ve lost count…..!
This is not a bridge, it’s a really flat brick
I can literally walk on this bridge even jump and this won't even move ☠️
professional upstairs neighbor
TRIANGLES! NO SQUARES! PLEASE!
Crazy how the TikTok video has 180k likes and the main video got 700 likes
Their is NO way that little Lego car weighs 100 KGs let alone more then a pound! Lol
Car weighs 100grams he went with a factor of safety of 1000
@@sovietunion8304 uh, no it's a joke. And I was joking about it.
A KG is 2.2 pounds his goal as you saw was to make a bridge able to carry 100 KG, which is over 220 pounds. Look at all those Weights. Do you really think 10 of those Lego Cars weigh as much as a single 20 KG weight!??????
sorry im not the best at picking up jokes in text im also American so i have no idea how the metric systems works all i know is its base 10@@jamessilva1259
now build one which can hold my teacher (200kg)
Upstairs neighbours be like
Should’ve used triangles😢
Someone needs to learn about trusses
Poor sharks.
Only bridge 6 can support my weight😢
222 pounds is crazy
A bridge with no triangles. Sad
His downstairs neighbors☠️
some really bad designs ... far too much build in parallel where it should have been truss geometry and ending up with a center pillar which isnt supported at its base is very silly.
could have achieved the 100kg with far less and with much more style
Die armen untermieter
Just kupchak national power people on see on getting on lurking on warking pitches doing industry taller Jack economic business news reports speak too industry 🤬🤥🤪😷🤭
Это неуважение и издевательство над Лего, нет машинок весом в 80 кг!!!!!!!!!!!!!!!!!!!!!!!!
Doesn’t look like Lego to me…..