Record Truss Bridge 2012 - University of Auckland Engineering
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- เผยแพร่เมื่อ 8 ก.พ. 2025
- This truss bridge is the current record holder at the University of Auckland's Faculty of Engineering. It supported 1087N before an additional 96N caused failure.
If you are interested in studying engineering in New Zealand at the University of Auckland, follow this link - www.engineering...
![CONCURSO SPAGHETTI BRIDGE 2019 en UAH - Concurso Puente de Espaguetis [Real Poly Bridge 😀]](/img/n.gif)
The bridge was more stable than the cameraman.
ikr,the camera man is trash
I think the camera man was going through a withdrawal of some sort😂😂 the way he was breathing and shaking 😂
omg ur on point haha,by d way care to aub guys i would be nice ty😅
👍
OH SNAP!... sound of sonic boom cause I said it so loud
Insane holding that much weight during a earthquake!
Anthony Cabrera underrated comment
These are so frágile on earthquakes... If edges separate enough do to an oscillatory quake the bridge wont broke. Just fall complete. It always happens... Axes mst be really long to allow movement of given buildings
Lmao
Are you Referring to the cameraman?
LOL
I entered this contest when I was in college, it is a great challenge for engineering students to get off the CAD software and actually build something and test it. We weren't allowed any metal pins though, only popsicle sticks and white glue, anything else used was a disqualifier. I still have mine hanging in my garage as inspiration. This group did a great job.
:)
They did outstanding…they better have gotten an A on this one 😁
how did it perform in the test?
@@cabletie69 if memory serves, we held about 2000lbs of downward force on the centre beam. Designed a gull wing truss like this...'IAI'...It nestled tight below and between the outer supports, and transferred the forces directly to the rig itself keeping the majority of the structure in compression rather than tension. We also pinned each connection with toothpick sized pins to strengthen the load bearing joints and dovetailed each length of popsicle stick so that they didnt slip where they butted against each other.
@@johnnybgoodbeesandbarbecue5788 impressive result! Nearly one metric ton.
This is the type of stuff that prooves if you actually learned stuff and were not just there to fill seats
Not exactly. Its a group work & inside the group there are always teammates who just fill seats.
@@yureino SHADE HHHAAHAHAHAHA
Haha 🤣
@@yureino If you're lucky, those bench warmers will offer to pay money. But most cases they do nothing and still expect to get credit for the group work.
@@yureino nah it’s uni not high school. In univ- at least in my uni everyone participated .
I would replace the loading technique with pouring sand into a container to get a more exact failure weight
Also it will increase the weight gradually
You boys would be in charge of cleaning up then
Yer right! And would it be more accurate if the load was put on top(not bottom) of the bridge?
@@fultontracymendoza6149 the bridge is designed around the idea of the load being applied like this though..
Do you realise how much 120+ kg of sand is though? Just not practical
I remember building a balsa wood bridge in secondary school.
I love engineering and two others in my group did as well. We designed a bridge that worked so well using designs that were really cleaver and fantastic.
In the end we ran out of bricks to put on the bridge, so we got the teacher to stand on it. Our bridge still sits proudly on the wall of records.
We set the record of 140KGs.
In my high school physics class in 1975, two students took their quota of balsa splints and laminated two beams. It was better by many orders of magnitude. They illustrated why we don't build truss bridges and captured the essence of composite construction which was taking off at the time. The dinosaur teacher disqualified them as "not in the spirit of the contest".
@@iverburl Right?
_"You're here to learn to be the next generation of innovators"_
*_"Oh, you innovated too much."_*
can we all just appreciate that 50 or less Popsicle sticks held up over 280lbs of weight..???
yes, because thats what this video is
What kg 280lbs is?
@@okiriotaa4664 around 120 kg
ur saying 50 or less popsicle sticks can hold two of me?
@@Starnoch yeah
Hopefully this engineering student has found relief from his constant seizures!
Never have i been so happy or seen anyone so happy to see their project break....after all, it's a truss bridge, and we all are eagerly waiting for it to break at some point😃🙌🙌
The crazy thing is that the actually bridge part didn’t fail the sticks failed
That's what's going to be the source of failure no matter what, it's just about designing it to distribute weight across all of the sticks.
@William Lyon I think they mean the parts where the sticks connected, whereas the breaking point was actually in the middle of the popsicle sticks instead.
@Neal Head pressure will almost never be evenly distributed across a bridge
??? the sticks are the bridge, it's like saying an actual bridge didn't fail because only the cable snapped
What will melt your brain more than this is they had stacked the weight on top of the bridge it would have had a different breaking point, in terms of weight. It may have been less or it may have been more but having it distributed differently would have changed the physics.
Wow. They added almost 111kg (244lbs) to the bridge before breaking. That's insane
Yeah, that's just insane. I'd not trust a 3cm thick and 15cm wide plank to hold that weight!
That means that I could stand on it and have 90ish pounds of leeway before it broke
Dam that about double my weight though i do not trust that it would hold me because of mass and the slight movement and vibrations our bodies give off
@@shrimp3486 yep a nail hanging off a wall could hold a car.
But applying any moment on the car would cause that nail to break off.
People underestimate, how strong every day objects are
@@2DReanimation Over that span it would hold that easily
Fine, I'll watch it, TH-cam.
Simon Well, at least I know now how to count to three on a university level.
FINE
Simon lol
Honestly
Same reason i watched it haha
Why do they always find the weakest link to operate the camera?
Most likely one of the profs. So chances are pretty good they know a whole lot more than you.
LOL you call this acceptable camera work for a record attempt, wow you have very low standards. If it is a prof then it looks like he's suffering from detox shakes, give the poor guy a drink.
well what other job do you suggest he do?
he's a damn engineering prof not a film maker
This was recorded at a University, I doubt they're going to bring in a professional to record a wooden bridge :l
If only they could also build a stable camera stand.
If only people realize that not everything is a proper video shoot.
@@PrincipalCowbellist doesnt need to be to hold a camera steady
cheers mate. it was 2012 (or maybe older)
Shake demonstrated that it’s earthquake
Probably not a good idea to be filming after a heavy night of drinking. The shakes can be a terrible thing.
The camera man was still high from all the adhesives used in this project.
It was plain white (PVA) glue like used in elementary school. No fumes or harsh solvents. You can eat it without ill effects. Safe for children.
I remember doing this same project in my 7th grade industrial science elective class, very fun assignment. A couple of the teachers had an on-going fun feud to see which of theirs could outperform the other and awarded the students with extra points for getting the highest load or breaking a record. Learning can be a lot of fun! 😁
You could select your 7th grade class?
Since 90% of these comments are disrespectful ill drop in to say good job breaking the record there that was impressive
76.4% you fucking idiot.
what record m8 ?
Anthony Cannon tried to resign and get my own team and also develop more but you know how engineering goes people don't want to see you on the top so they it do their thing
SOLUTION ONE disrespectful reply
@@Loachie90 You must be big into humour Micheal?
I did this exact same design project in the 1st semester of 2018 at UoA and thought I would clear up some common queries in the comments. First-year students are given 3 weeks and a limited number of popsicle sticks to create the structure. There is also a tonne of ridiculous spatial requirements between the two resting points which largely dictate the unsymmetrical shape of the structure. These shapes and joints could theoretically hold a lot more weight as the limiting factor is the grain of the popsicle sticks, almost all examples break transversely to the grain at the loading point. You may notice that this structure has almost excessive cross-bracing on its top to withstand the largely imperfect loading method. Structures without sufficient crossbracing fail almost instantly (like,
Necro post. =) That is Ok, if you asked me. It held 1087N @146g ~750:1. Caveat, maybe they were forced to use the bolts as junctions compared to most other engineering competitions? Did you have to do that? Did not even hit 800:1, let alone 1200:1 for same competition held elsewhere in world(usually with longer span). The next caveat is the 10g of glue limit as most other bridge competitions usually meter out the glue based on volume instead of weight as they use "white" water based glue instead of PVA(rather odd)so I do not know how this converts to other competitions(the one I did and thousands of others around the world) and they might have chosen this to PURPOSEFULLY differentiate this competition due to the age of the internet and ability to download files from other people and same goes for your stated misalignment of the footings which does not make a difference to anyone who knows how to build anything, but to someone who is lazy and tries slapping something together at last minute... yup. Also, the span used in this competition is shorter than normal which significantly helps increase the load numbers and strength to weight ratios.
Always a good engineering competition. The ball bridge drop test catch engineering challenge is even better along with the earthquake building challenge.
PS: No "I" beams built out of the popsicles makes this a poorly designed bridge as a competition example. Stopping the transverse grain splitting on the popsicle sticks is easy with a little glue and a shred of cross bracing against the grain direction.
Jesus Christ I am a bridge Engineer and this impressed me !!
With a focus where the load would be placed. It's cool
george waite is the load being off centre relevant ?
Seems like you're under qualified in this case. I am a design engineer and I was not impressed by this.
@@scientist100 username checks out.... not
@@victor8992 ok captain obvious.
6:04 "that's 19 and 8... Soooo 26" Im not going over any Bridges in new Zealand from now on
Raphael Thorp He bad at math
So they actually beat the record by 7...
Lol, I noticed that too and decided to check the comments first before I commented 😂
Lost that little casio calculator. LOL.
19 + 8 sooo 26 with 1 as a safety margin for people who don't read safety limits for my NZ bridge - I feel safe here in NZ
Most satisfying video? I just wanted it to break. For real though
Of course I understand 😉 I won’t tell them about your TH-cam channel
Never expected you here lmao
Love your videos bro
@@vikramsingha2312 tf if I knew ur location I’d probably find lost boys in ur basement and verified TH-camrs which u captured
Geez Zuss.... can the cameraman take some classes there???
Frustrating. Cameta did not focus on the truss and the weight.
the cameraman suffera from autism dude.. we should respect that!!
At least it’s horizontal
Well it ain't a film class
waxandwane iiiiiii
This is pretty cool. I'm a EE so have no idea how a bridge works but as a different kind of engineer can still appreciate the work
I’m probably the only one here that searched for this video.
Tell me your story
I'm with GARLIC BREAD PROVIDER
@@levihuerta9393 I’m in a Poe class, and we were instructed to create a bridge from 1/16 inch wooden sticks. I searched up videos for ideas on what kind of bridge to make, and this unique design caught my eye.
yes
Damn was gonna say that but you stole it. Wanted to see what kind of bridges are the strongest in the world and I somehow stumbled upon this and it caught my eye and honestly glad I watched it.
I remember doing this in high school metal shop. The difference though was you had to make this out of 2 meters of oxy-acetylene welding wire and weld each joint. So it was a test of your design and welding skills. Pretty proud to say I held the record for at least the 4 years I was in school.
My similar thing was to make a foundation using 4 index cards and 2 inches of scotch tape. I remember my group not wanting to take my idea so I went and freelanced it and had the best solution. Held every text book in the classroom. Its really an easy solution if youre even just a little bit mechanically or structurally inclined.
As an mechanical engineering student at Worcester Polytechnic institute in the early 1980s we did the same exercise. Turned out design and calculated load was as important as construction technique. We were not allowed to use mechanical pins. Some of the students even fashioned gusset plates out of the glue tube !
Great! That's really using the materials "at hand".
maybe they should offer a course in film making.
I almost got an epilepsy watching this video
U mean film shaking?
Loved Statics. One of my favorite classes. You never see your surroundings the same after that clas.
Brilliant placing the loading point off center! And biasing it towards tension rather than compression! Wonderful.
Are you referring to the asymmetry ?
@@redreuben5260 yes the asymmetry. I believe the closer you place the load to the edge, the less moment you need to deal with.
@@Aheitchoo That’s fine for a static test but does it apply when a cement truck drives from one side to the other ?
@@redreuben5260 This certainly wouldnt work for a cement truck. But as a discrete solution to a discrete problem its clever.
Why it asymmetric tho
Edit:WTF,That thing is strong
It puts the load closer to being under an anchorpoint therefore reducing the stiffness needed to hold the weight up and reducing the strain on the structure of the bridge.
@@callumwyper now if only you can convince all that vehicular traffic on your bridge to distribute their loading per your optimized design...
Edit: I recognize that the design probably fell within the requirements of the competition, I just don’t agree that it’s an appropriate simulation of real-world requirements
@@SpamSucker What if it is just an estructural part of, for example, a machine, such as a crane.
It is quite easy to be a smartass, not so much to think outside the box...
@@SpamSucker i don't see anyone who say that it's an appropriate simulation of real-world requirements
@@callumwyper We had the same design problem at QIT (to span two points with a sheet of paper) only the load had to go through the centre. I got 100lbs which was the record in 1975.
now can they learn how to operate a camera?
+TheRoguePhysicist lol
TheRoguePhysicist it is sideways idk what your talkimg about
That's for art majors.
They're engineers.... they can tell you how a bridge is supposed to be built but have no idea how to cross one
this was 5 years ago. People today still use vertical
I miss fun engineering classes. I had a beautiful bridge that took like 140 lbs to break and was something like 60g, made of balsa so not a fair comparison to popsicle sticks
To everyone commenting about the camera shakes. This is from 2013. Digital stabilization wasn’t necessarily widely found on cheap cameras/smartphones.
Also CONGRATULATIONS to the team who designed and built this masterpiece!!!
Please redefine the wording to the video title - This is not a test of a bridge - but the test of a central load hanger
The real winner is University of Aukland, 4M+ views
Thank you UoA, my brain will now be fighting itself for the rest of the day.
I loved these experiments in college and high school. So much fun.
I agree with all the camera comments. University of Auckland's Faculty of Engineering students can make a truss bridge that supports 1087N but can't figure out how to place a camera on a tripod. Regardless... FANTASTIC JOB!
look something worth filming! Quick get the worst cameraman we can find!!!
I suppose he was the best cameraman they could get.
/r/killthecameraman
Call me misogynistic, but the cameraman must have been a woman. lol
Justin Thyme you could hear his voice, dumbass
@@justinthyme5730 I think we all know a man is more likely to be worse at filming than a woman.
In my opinion: the big problem was the V-shape where the load was attached. The v-shape produces tension outwards to the left and the right of the bolt. I think a curved shape in dimension of the bolt would be better.
Lol Idk why I'm replying to this 4 years after you made the comment, but if you look carefully at the joint at 1:35 right before the bolt is placed there is a curved connector piece of wood that straddles the V
They have curved chop sticks?
@@DerusGrindz put them in water and bend them the way you want
Nicely done, team!
Next assignment... Camera Stabilizer.
This reminds me of a paper bridge contest we had at school. We were given 10 sheets of paper and some glue to make the strongest bridge we could come up with. My design used only 6 sheets. I made a layer of paper folded back and forth in a zig zag pattern, glued the deck onto that and added a triangular "tunnel" to the bottom to give it all some extra strength.
That bridge not only spanned almost twice the length of all the bridges my classmates had made but also carried more than 3 times the load the teacher had set as a target.
You should habe build little paper cars and trucks that go over the bridge with the 4 paper sheets you had left lol
We did this in middle school, 8th grade... was a blast learning about tension loads.
Having done this in an engineering class in high school I have to note the way in which the structure collapsed which was via the load point only leaving much of the bridge structure intact.
I remember many spectacular failures, including my own bridge, in which the entire structure collapsed and failed.
I don’t remember any, though there could have been some that collapsed at the load point. Very fun to watch!
"19+8" "26"
Engineering students.
I was wondering why he was using a calculator, would've counted that in my head low iq engineers
At some point you really stop doing little maths like that and focus more on other things like analyzing problems to determine what equations/methods to use.
Little engineering tip: never waste any time solving what computers can do better.
@@cosmosity1693 Because it's just as likely to have 13.24*pi. You don't know what will you encounter next, so better use a method that solves all.
@International Jujuman Miscalculation like that is like little grammatical mistakes. You don't correct people, because nothing is gained in doing so.
In highschool I remember we did this and I won for efficiency (weight of bridge vs payload) with a 19 gram bridge that held over 1500x its own weight. (yes that's a bit over 50 lbs)
Basic rules: 30 cm Span, 5cm wide "roadway", using only 1/8" basswood and what I think was PVA glue. It was some white hobby glue I forget exactly what it was.
Load simulated by 8cm x 4cm wood blovk with a hook on the bottom (where the bucket hang from), which is rotated slightly diagonally to spread the load onto the sides.
Also, no laminating 2 pieces together (except for where the "sides" met the
"roadway"), and there were a few other specifics.
this bridge held up 110 kg or 242 lbs
Wonder if there was an advantage by the middle of the bridge is offset. I think there was some, imagine an extreme case when the load is 1 cm away from the side post.
proud of you guys
Mom : " Quit eating Popsicle's for Breakfast , Lunch and Dinner ! ".
Kid : " It's for School ! "
We did something like this in high school. Our team lost on a technicality. The winning entry was demolished during the test. We took ours home.
F=m x a which means m(kg) =F(newtons) / a (gravity) 1087/9.81 = 110,8 Kg not pounds
LMAO COPY AND PASTE
thanks for saving a google search
labobo, that’s basic fucking math dude.
Justlike Thomas
Also, Autistic person detected!
labobo.
Yeah, obviously I’m the triggered one.
I wish we had got this much fun learning in my days in engineering college.
Building the bridge is easy. Predicting it accurately is the problem. Well done.
I haven't the slightest clue what the hell this is or why it's in my recs, but they sure seem excited.
As a woodworker I wonder how much the wood comes into play. Depending on what part of the tree each stick is cut from can have a big difference in strength. Old growth trees will have tighter growth rings making it stronger compared to farmed tree with wider and weaker growth rings. The PVA glue too. A rough piece will stick together better then if both pieces are smooth. 🧐
Exactly what I thought, I would definitely treat the wood with some sand paper at the areas where glue is applied. The part about using stronger better stick is probably part of the competition, I am sure the teams built dozens of prototypes before ending up with final design, so they definitely noticed that some sticks are stronger, the glued parts tend to fail less if the surface is rougher etc. But my guess is that the design is 90% of the strength.
I am more mad about the weighting process, first off yoj should apply weight on the top of the bridge, it would carry much more weight, or dont call it a bridge but a hanger or something, but it is dumb because with a bridge you distributing the weight over the whole construction, where with a hanger, that spot where you hang is the most stressed. But the worst part is adding weights, why keep adding 10kg plates, why not add like +1, +2, +3, +4, remove and add +10, they failed at +10 but the limit was anywhere from +1 to +9. Also the dude is not very gentle adding the 10kg plates, so the inertial force might have actually peaked at few kgs higher if the plate was actually slightly dropped. I dont know, I would personally load it with a hella strong wire that is slowly spinned onto a coil, with a peak force meter in between.
19 and 8 is 27, Not 26. Where’s my engineering degree
Cluckinwing you mean your mathematician degree?
Cluckinwing 87 % output of manual labor and const. Pos. Ma th
Atom M Arithmetic computation is more related to engineering than mathematics. Engineers have to compute much more than mathematicians.
actually mathematicians typically dont deal with real numbers
1+2+3 is not exactly 6
This reminded me of a bridge I built out of balsa wood and glue in high school AP physics class. We ran out of weight objects(which were being placed in a 5 gallon bucket) and the bridge didn't break. I used the Roman arch principle as inspiration for design and placed arches along outer edges on both sides and in between the two outer rows perpendicular to them.
the bridge folded in several location, this is a good sign that the distribution of the tension was fairly good. It would be even better if the bridge literally exploded everywhere at the same time, meaning that all the efforts were all over the place, evenly.
when I did this exercice back then (with spaghetti), we used 2 buckets of water and poor in from one to the other gently, then weight the bucket after the bridge breaks. Seems more convenient than the loads you are using.
good show, loved it.
Thanks.
I enjoyed it too! From what I can see, the joint failed. It would be interesting to see how the bridge holds up if the joint could be a single piece of cnc'd aluminum. But then again, the connection to the internal member may be the next point of failure due to the shear value of the bolt in the Popsicle stick. The pre-stressing of the bridge is a clever idea!
At least the video wasn’t recorded vertically
My bridge (2019) held upto 550N, very proud of my bad boi! 😅
Let's give the camera to the parkinson guy
As cameraman is a good engineer 😏
Haja
lmao
This is what saves life's. Keep going at it!
Very nice! That's about 244 lbs. I had to do a similar thing working with my young teen's his science class. Sadly, it was all balsa sticks and no screws were allowed. But we fell farrrrrr short of this. It's a superb way to learn about structures
Man, that was a great bridge. Good job. I wish my bridge would of lasted that long.
-〉FuKzWiTiT〈- I would even cut my own tree down and even plant them to carrots enter that into the input output but they don't let me do that
when you make that out of 10 sheets of 8x11 normal stock copier paper. call us. No joke that is the final engineer bonus test we had to tackle.
Go on.. 😂
Seems like a really strange place to position the weight.
Rice Man that's what I thought, shouldn't the load be on the top of the bridge?
Or in the center of the bridge.. Offsetting it like that will increase its payload capacity.
you build a bridge for a task it should do and by required conditions. if load was intended to be on the top or the middle of the bridge, design will change to accommodate load.
as example for this design, i can picture bottom road hanging from this bridge structure. anchoring is at the top of the hills/mountains, road is in lover level of the same hill and canyon under...
I assume the rules didnt say the load had to be completely centered. Since the purpose of the bridge was solely to win a competition, all they had to do was stay within whatever guidelines were given.
there are tons of bridges with asymmetric loads and just one example is pylon bridge in belgrade serbia as newest addition of the big bridges...
are there any rules regarding the placement of the weight? if the weight can be offcenterd why not just put it nexts to the edge? This way you eliminate the moment forces and have to deal only with the shear forces
I don't have access to the rules of the competition, but it seems to me the load should have to be applied at the midpoint (ie: equidistant from both side supports) to ensure a level playing field for all contestants.
Have a contest on who can hold the bloody camera steady the longest
Terrible
I wish more schools did this. Too many of the "top" universities focus completely on analytical work.
TH-cam:
2012..nope
2013..nope
2014..nope
2015..nope
2016..nope
2017..nope
2018..nope
2019..yes, let's recommend it.
HAHAHAH
Insane TH-cam
Hahaha something is fucked up with TH-cam 😂😂
2019
I got it recommended in 2020
my education fron Eng School served me well. Our bridge back in the 70s was a hardboard box girder.
Its good having fun and learned skills, and ideas. Wish all schools do same as this. Group project to enhance there skill, ideas knowledge and teamwork.
The intro says the students had to make an estimate before the test. I'm just curious how accurate the estimate was.
I think it said the bridge was estimated to hold 1.2kN but it held 1087N.
WON TOO TREE
for. fi
nonya bizznes si, sean, ate, neigh , ten
nonya bizznes el eben, twelm, thering, fworning, fwifing, sickteen, selming, ehing, nyneing, Tweny
Juan to tree
nonya bizznes Ett, Två, Tre, fyra , sex ?
Only as strong as the adhesive!
nytom4info
Call me crazy, but I'd use a bucket and slowly fill it with water. That would allow for adding the last fractions of a N in small increments.
Larry Scott how would you keep water from spilling everywhere?
If it was really important, there are digital force gauges that can measure precisely how much force was applied before failure, and even create fancy graphs of the load over time.
Nnelg
A sufficiently large bucket only has to be suspended 2-3 cm. And a digital load cell that records data, rate of increase, and maximum load. Even if the bucket spilled.
The some what large weights don't permit a fine granularity of increase.
Either way, the very high engineering of the truss seemed to be determined by an unreasonably crude application of load.
What if 1st and 2nd place were separated by 10 g? And the 3 second count to add more? A steady stream of water adding a given load per second, which can be regulated to appropriately slow, would seem to be more objective. And the rate could be digitally recorded as well.
IMO
If the top two are separated by less than one Neuton of force, then it's simply a tie. This isn't some inter-school competition with a cash prize involved, it's a class project for first-year mechanical engineering students. It doesn't really matter who wins, the point is just for the students to put what they learned in class to a real-world test.
Nnelg
Well mechanically, water in bucket is simpler. And simpler is good engineering.
Good example what kind of videos should be on internet - congratulations to wise New Zealanders
We need young people like those there to come and built a bridge here in miami. We had a terrible failure of a bridge that killed several people a few months back.
someones getting lucky later on. high five. lol
This comment made me lol XD
Probably not. See how alkward he was at the female contact. And the way his body language was. That's 40 year old virgin irl
R O F L
Tim Z not always. Otherwise actual structures would always break at the weld points and that isn't the case.
Chris Baker they are in uni bro, they would be closer to 25
I drive semi's over bridges all the time.
Engineering has always fascinated me.
that's unbelievable
As an engineer, I am afraid that there is nothing impressive about this " record bridge" as the manner it is being tested is not correct. I could do even better with one loose fishing line tied to the ends of the cliff. All they have is basically triangular of forces experiments using only three STRINGS. The horizontal part of the bridge is not taking a " bridge" downward force but only a horizontal compression and to provide some solidity to the two support ends rather than tying the ends to the cliff edges.
That bridge should not be " loaded" by pulling down from the point which it was tested as that is completely the wrong test. The loading point should be at the top and not even at the center of the bridge but slightly off-center.
I am surprised that the judges of this competition as Aukland Univerity did not see this misnomer of how the bridge was tested. That bridge should have been tested at the walkway of the bridge and not at that lowest suspension point when all it turned out to be is a three-string suspension system one string to suspend the load from one point and the other two tension strings reducing the load by their looseness and having their anchor points on the cliff edges!! THATIS NO BRIDGE, that is a loose rope across a valley, loaded at its centre!
Carmel Pule' shut up, nerd
I ain't no Roman Engineer but It would of had a better chance if the load bearing point was at the top! 🤔🤭
Shakoiatenhawitha Cross Jacobs nerd big different from engineer
In 9th grade my son built one out of toothpicks. 20 inches long and held 32 LBS before breaking. Toothpicks and wood glue, I can't remember the weight the bridge had to be under, but his held the most since they started doing it. The only thing I did to help him, was clamps so the glue could dry, and showed him a place in a book about building railroad bridges.
Had me on the edge of my chair., Bravo well done....
Is there a reason why the bridge was built asymmetrically?
He didn't want to take a divisive stance to the project.
put one hand on a wall then slide your feet further and further away from the wall
you can feel it in your arm and legs
you are redirecting the force
its 2019...is there an Actual Bridge of this Design?
I think it's not good for sea link purposes becoz there is too much structure beneath the road level .
“You stupid”
“No I not”
“What’s 19+8”
“26”
Don’t know why but when I heard him say that I thought of it....
The load doesn’t have to be centered? That would increase the lid capacity by a bit. There has to be some rule with that as you could just load the bridge at one end and have it support hundreds of kg
In high school I built a balsa wood and Elmer's glue bridge. It weighed 28g and held 32Kg. That's 1150x it's weight, compared to 760x in the video. We stacked all the weights in the physics lab onto it and were looking for other things to add when it exploded, sending pieces of wood all across the room. The teacher said it held the most he's ever seen.
Exactly, this one isn't really anything impressive. I made one in physics class that weighed 19 grams and carried 28.5 ish kg, IIRC it was around 1560x its own weight.
In my case It was because I was going absolutely HAM and using Lap and bridle joints with minimal glue (applied with a toothpick even) to get the weight down.
(That's in comparison to purely butt joints and glue which is what everyone else did, according to the rules which said each "side" of the tubular bridge had to be a 2D section. But hey mine was still the same thickness all the way along).
good job..keep moving forward 😃
This is real life Poly Bridge right here
Are they counting out "1, 2, 3" to announce that the bridge has to support the weight for three seconds for that weight to qualify?
11:13 PM
4/13/2019
@jameshisself Alright! Thank you for the clarification! 😀 :D 😃 😄
12:01 PM
4/17/2019
Just passed high noon!
Alot of comments about where the weight is being distributed. This test was for them to build a bridge that would get continuous weight at a sing point, the bottom. True a real bridge would be tested for continuous weight distributed across the deck, or where ever the roadway would be. Way to do that would be get a block of wood the size and shape of the overall roadway with the bar hanging through the bridge to add weight. Kinda like a T
Looks like the material failed before the structure did! Nice job!
Wouldn't it be better to test the bridge with weights on top instead of hanging from below? Back in college, we made bridges out of balsa wood, and put weights on top of it to simulate it like a real bridge.
The instructions clearly state the "truss members must form only triangles" when that is not in fact the case for this bridge.
i dont get it, if youre gonna design a bridge you should test the load on the top not on the bottom of structure, you gonna put load ( car on the top rolling across the bridge not on one spot below)
We did this in my high-school. Someone made a bridge that withstood the max weight we had so we made a kid stand on the thing underneath and it still didn’t break.
I like how they shifted the weight to the side and used the lever effect.