Can a LEGO Bridge Hold 100kg? 

Can we have a moment of silence for all the innocent technic pins that gave their lives in pursuit of this demo?

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.

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.

Some guy stole this and posted it on tiktok

IKEA table are incredibly strong !

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.

That creaking. Never thought it would hold that weight.

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.

The side members usually give way first I noticed. Joins have point of failure

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.

OMG, the bridge's durability is admirable

The whole deck is made from square's, should have used triangles instead. Triangles are soooo much stronger

6:44 lets give a applause on that bridge holding 101 kg while on life support

Good that sharks are safe

Bro got weights from ww2. Really good and solid content keep it up

Theoretically most of us could stand on that?

Beautiful video thanks for sharing 😊"

A bridge has fallen into the river! Quick!!! Build a man to repair it!

This should have 1m+ views

Fantastic!

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.

Amazing!!!! Kind regards from Germany

First comment after 6 minutes, I’m sorry, so much effort, but no one is active😢😢😢

nah the poor sharks

wouldve been stronger if you staggered the boxes and instead of the pillar at the middle, pillars of either side lifting the middle

I knew my upstairs neighbor was up to something 🤯

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.

RIP to all reported injuries…

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.

Plates would help lock prices together

the innocent triple technic pins and double pins 😢 tehy gave there lives

Stagger the joints like a brick wall

huh, so its like building a kilotone bridge for 100 kg, totally not overkill

Came here from tiktok, I like your channel

Crazy

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.

4:00 yeah the car aint gonna make it

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.

XOOL!!! HOW ARE U NOT POPULAR!?!?!?!

the downstairs neighbour: "what the hell they doing up there?"

Mother: Stop watching iPad ! It’s bad for you and you watching RU-vidrs play games all day is rotting your brain! What I’m watching:

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

TRIANGLES! NO SQUARES! PLEASE!

I don’t like the cracking noise when they put the weights on.

professional upstairs neighbor

Yea it can!

I can literally walk on this bridge even jump and this won't even move ☠️

Upstairs neighbours be like

His downstairs neighbors☠️

How many 5x7 framas did you have? And how much $$$ they cost

Poor sharks.

Did anyone come from that one tik tok vid that dosent have a second part?

I hope you got no neighbours in the appartement below you :D

Crazy how the TikTok video has 180k likes and the main video got 700 likes

Should’ve used triangles😢

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.

Their is NO way that little Lego car weighs 100 KGs let alone more then a pound! Lol

Only bridge 6 can support my weight😢

Someone needs to learn about trusses

222 pounds is crazy

This is not a bridge, it’s a really flat brick

A bridge with no triangles. Sad

Die armen untermieter

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

Это неуважение и издевательство над Лего, нет машинок весом в 80 кг!!!!!!!!!!!!!!!!!!!!!!!!

The annoying sound effects whenever he upgrades the bridge

Doesn’t look like Lego to me…..