ฝัง
- เผยแพร่เมื่อ 4 มิ.ย. 2024
- Structural engineer Dr. Nehemiah Mabry answers the internet's burning questions about city building. How are underwater tunnels made? What city has the best urban designer? How do bridges not collapse? How do floating cities work? How do sink holes happen? Nehemiah answers all these questions and much more!
Director: Lisandro Perez-Rey
Director of Photography: Constantine Economides
Editor: Ron Douglas
Expert: Dr. Nehemiah Mabry
Line Producer: Joseph Buscemi
Associate Producer: Brandon White
Production Manager: Eric Martinez
Production Coordinator: Fernando Davila
Casting Producer: Nicole Ford
Camera Operator: Chris Alfonso
Audio: Brett Van Deusen
Production Assistant: Ryan Coppola
Post Production Supervisor: Alexa Deutsch
Post Production Coordinator: Ian Bryant
Supervising Editor: Doug Larsen
Assistant Editor: Ben Harowitz
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Thank you for this opportunity WIRED! I appreciate the comments as well 🙏🏾
Was World Trade Center a controlled demolition
Hi Dr. Nehemiah I just wanted to say your communication and knowledge of structural engineering is awesome. As a structural designer I would have a hard time trying to explain some of the questions. Awesome job.
Read a lot of urban planning and nobody ever described it as harmony between living working and playing. You killed it !
@@joshcervantes2961 Appreciate you
@@danielp415 Thanks for the kudos man
Should've called it "Structural support".
YESS
Or supports support
Missed opportunity
Ba dum tss
Thought the same thing
Went to school with this guy. Well done Nehemiah
Cool!
Omg me too
me 3
Me too! He is awesome!
awesome guy
I’m still blown away by cathedrals built in the 1300s.
Generational projects that are incredibly technically fantastic.
‘What is your favorite building’ is a staple ice breaker exercise for my group.
I recommend reading The Pillars of the Earth by Ken Follett. Realistic fiction that displayed how it takes generations to build a cathedral.
Yeah. It *definitely* makes sense that those buildings that are not even that huge take “generations” to complete instead of just having the advanced technology for it to complete in several days….
@AdhvaithSane what are you trying to say. The cologne cathedral took over 600 years before it was completed. Many other grand cathedrals and huge buildings in general took generations to construct.
I wanna point out how these videos are such a great way for children to explore careers and not to mention seeing someone who looks like them be an expert in their field. Well done Wired.
Indeed!
He looks nothing like me 😢
I hadn't ever considered that. You're absolutely right
Looks like them? What children do you know with a bald head and a full beard? lol
@@leok7193 They obviously mean race
He's not "just" a structural engineer, his knowledge of each aspect of civil engineering is astounding. Beautiful video.
who's saying "just"?
Maybe you missed the part where he says that he's a civil structural engineer. Civil engineers need to understand Geotechnical, Hydraulic, and Structural Engineering processes while also maintaining a connection to the economic factors involved in large scale construction. Civil Engineering isn't as easy as they make it out to be!
@@bobbyjenkins1321 i see, thanks for explaining
It’s called researching before filming lmao
He actually has a doctorate in civil engineering. Super humble guy!
As a structural engineer im amazed at what this guy knows. Some of the questions i would not consider to be our job like the question about traffic lights. Also some questions that were asked are for a specialized kind of structural engineer but he knew the answeres anyway. Im impressed!
Ikr. This guy is mind blowing 🤯
Well maybe because he had time to prepare the answers? You don't really believe he answered them on the spot, do you?
@@alexmaduta972 He also has a doctorate in the field which makes him highly knowledgeable and differentiated!
Right, they give the people the questions ahead of time and the answers are prepared ahead of time. Notice how they all have props and exhibits that just happen to go along with the questions. This kind of stuff is more scripted than you probably think.
You're not a structural engineer
This guy was sooo good, loved how well he explained everything, plus his ideas of ideal architecture too. Bring him back!!
Yeah i loved his video on the bridges, definitely one of the best hosts on this show.
As a structural engineering university professor, I sometimes think I might gesticulate too much when explaining some things. It was so reassuring to see Dr. Nehemiah do the exact same movements :) We need to "reinforce" those definitions with our hands :)
Did the WTC buildings have seismic dampers?
Gesticulation helps me to understand! Keep it up!
Hey, expressive teachers are the best! Especially for us visual learners who might have a hard time soaking up info just by listening to words alone.
@@nathanhaimson
😎👍,
👁️🧠👨🏫👀✌️👌🫡
(Yes I agree. I learn visually too. Good comment soldier.)
@@SmokeyChipOatley
Why the excessive use of emojis?
In Germany, traffic lights may also be deliberately programmed out of phase or particularly in phase for slow speeds, to slow down traffic. I.e. in a 30 zone you can either go fast and have to stop on each red light, or go slow and arrive at the perfect time.
In the US they are programmed out of phase to induce violence
They have that in Buenos Aires. It's actually incredible to take a taxi ride and it just never stops until you arrive at your destination, very unlike London where you sit for ages at every traffic light, watching the fare climb higher and higher.
We attempt that in the USA as well. Go the speed limit and you'll typically hit all greens on a particular street
This is common in the US as well but it's normally just set for the speed limit
most of the roads in the town I live in that have lights you hit one of them at 35mph and you just cruise thru all of them.
As a stormwater engineer we do design ponding to happen on purpose. For very large storm events we are restricted to how much water is allowed to enter the sewer system and at what rate. To meet these allowances we restrict flows and design for surface ponding. Not sure what the design requirements are in California but sometimes the puddles you see during big rain events are actually designed to be there.
I know nothing about engineering and I thought that I don't care about it either... Until I saw this video. SO informative and clear! Thanks Wired. Thanks Nehemiah.
Josh think about civil engineering where streets, sewer, electric, & water are designed around roads and buildings too make sense! It’s incredible!
As a CIVE, this is one of the most well done of these expert videos I've seen. I wouldn't be surprised to see this video included in some Intro university courses for engineering
Dr. Mabry is really good! Knowing the right information and conveying it to laypeople clearly are two different things and he's clearly got both sets of skills. Please bring him back!
He worked at the university I went to and talked to my freshman class a few times. If I'm not mistaken he judged a competition we had and I was the third place winner. I got my engineering degree but am not using it. Glad someone as smart and nice as Nehemiah is though.
Go use that degree!!
😊 Check us out btw 😉
what a waste you don't use it. I am saddened by that fact.
I'm curious, why aren't you using your degree?
Would love to see a similar episode with an urban planner. I feel they have another perspective on the political and theoretical aspects of cities.
we do.
i often find myself entrenched in social aspects more than anything when it comes to urban planning and design.
i just wanna design cool looking cities and squeeze in more parks but i end up working more with people and our social plights.
@SokunRia
are NIMBY's helpful in ANY way or just naysayers?
In the Netherlands, almost all, if not all, of the traffic lights have sensors that monitor the flow of traffic at the intersection, as well as in the town/ city to keep the flow of traffic moving. I.e., you can be approaching a green traffic light that turns red, it can turn back to green in seconds if it doesn't detect any other traffic with priority.
If a light turned red then quickly went back to red here in the US, people would be crashing all the time ☠️ people here don’t know how to drive
Every time I hear someone talk about the Netherlands it sounds magical.
Every time I hear people bring things up like sensor governed traffic lights for example, I think, isn’t this the standard in every country?
In America stoplights are synchronized to move platoons of automobiles. Pedestrians often have to wait a few minutes at each light but this is okay for two reasons.
First, if you were important you wouldn't be walking. Stoplights help poor people remember that they're poor, which provides incentives to stop being poor. This is called "economic stimulus."
Second, it encourages pedestrians to violate the signals. That way, when they encounter traffic conflicts they're liable for their own injuries. This is called "fighting poverty."
@@hunchbackaudioIn the US, there are several types of traffic lights, only some of which have sensors. Some are static timing, some have timing that differs by time of day, some are timed but with walk buttons, and some are sensor based.
I love seeing smart, genuine professionals talk about what they love. It’s a bonus when they can actually talk about it in a way that educates you!!
I’d love to see more of him, he explained clearly and passionately.
It's really nice to get some real professional and truly an expert on their field on answering some of these questions!! 🤩
Would love to see this done for other engineering disciplines - like electrical, mechanical, aerospace etc
Dr. Mabry is giving us a great foundation of information to build on.
Check u out 😎
😐🙂😁😆😂🤣😭🤢🤮
I see what you did there
Bro I just saw your comment on the rocket science video, you are demolishing this comment sections with your good jokes.
A lot of math also goes into designing a bridge for wind and variable load conditions. Two examples where the engineers fell down were the wibbly wobbly London Millennium Footbridge and the 1940 Tacoma Narrows Bridge, and we still have bridges where soldiers are advised to "break step" when crossing them to avoid resonances.
About the question on rainfall drain in California (10:45), as an agronomist I may also had one HUGE factor: soil. Soil, natural one, absorb a lot of water thank to all the porosity in it, roots, micro and macro organism tunnel in it etc. But nowadays, with intensive agriculture, tilling, machine passage and loss of soil fertility, agricultural soil absorbe less and less water (that why irrigation is more and more needed, making roots superficials, and so less soil porosity, that can became a vicious circle if not well managed). In addition, natural soil like forest, plain, meadows become scare and artificial soil more vaste. City drown themself by being to big and bad built (i.e: no green space, no porous soil...).
How is it that this channel always manages to find individuals like this? Like I'm not even interested in half the subjects, yet these are always fascinating.
Something about this guy just makes him seem super trustworthy and interesting
Traffic signalization can also address issues of speeding (so you'll hit more red lights if you drive higher than the speed limit) or are prioritizing other modes of transport, such as pedestrians, bike lane users, and buses (and so vehicle drivers will experience more red lights).
Exactly. San Francisco has a number of "green wave" streets that are timed to 15, 20, or 25 mph, as well as one that is timed to 10-12 for bicycles. If you hit it just right and nobody's being a jabroney, you can get across town super efficiently.
That’s hilarious because in my city you hit every two red light if you drive at the speed limit but goes through pretty much every one green at 100kph.
One of the most straight forward person who appears in tech support. Someone who I willingly talk with all day long.
I didn't have a favorite structural engineer and now I do
Isn't he something?
He came into my lecture for one of my classes and he was amazing and had all of us engaged.
Worth noting many of the existing subways in NYC replaced elevated lines. Elevated lines were unsightly, noisy, made local housing undesirable and the areas beneath them were dark and often attracted seedy characters. They ran on coal so they spewed pollution. Subways are far superior, particularly for places as dense as NYC.
My brother is an engineer, and I'm in the creative world but still have my love of the sciences. Watched this video to get more into his current line of study-- so interesting and well-explained! :)
Always impressive when very experts on a topic can concisely explain complex concepts without either confusing or condescending their audience. Nice job and thank you
civil engineering is the most underrated profession
Just the right amount of explanation for everyone to understand. This is good. I hope he makes more videos.
Really enjoyed this brilliant man’s accessible explanations. Bring him back for round two!
That NYC subway questions is a little funny because NYC HAD elevated subways before we had underground ones, but people didn't like them because they were loud, often used polluting steam engines, and darkened streets. We even called them the EL just like Chicago's famous system. Even today the NYC subway system is 40% above ground, mostly in the outer boroughs. (Brooklyn, Queens, Bronx, Staten Island, the area around Manhattan Island) Even in Manhattan, some lines go above ground. The Metro north mainline rail and the 1 line. These are both in upper manhattan (the harlem neighborhood) and are above ground because the terrain get's a bit strange and variable so it was easier to build above ground.
Yes. And I also think some of the above ground trains, particularly in outer boroughs are vestiges of the old EL system. Many of the subways follow the same footprints.
Civil engineering in itself is a pretty vast subject with each having a specialization, so this makes it more impressive that this man can answer questions related to diff discipline
That was a lot of topics! Thanks for the fun explanations.
This was awesome! I’ve always been intrigued by the engineering feats we’ve been able to accomplish. Glad to have at least a surface level understanding now.
Loved the video, and Dr. Mabry was a great choice; super competent and great at explaining the thought, detail and effort that goes into public safety when building and planning. Great video, thanks for your time, man.
Great display of how well versed civil engineers are in so so many important topics
I see this guy on Engineering Catastrophes all the time as one of the experts that comments on stuff that happened! Good for him, this was good
This guys enthusiasm is infectious! And I love his little Brio Train bridge, perfect touch.
I loved Dr.Mabry's video ('Every Bridge for Every Situation') for WIRED a couple of years ago, that and PolyBridge reignited an old interest in civil engineering - nice to see him back!
Dr. Mabry’s awesome - great explanations to all these questions presented with enthusiasm and yet not talking over our heads. Very nicely done!
I love this series and watch whenever it comes up in my feed, even the topics i don't think I'm interested in because i always learn something cool! 🙂
its nice to listen to experts who enjoy sharing their knowledge
As a civil engineering student, I'm grateful for this video! Thank you so much Dr. Nehemiah Mabry and WIRED!!!
No doubt! 😊 Check us out 😉
love this guy's energy! thanks for the educational information brought out in a positive way
Wow my structural questions can finally live at peace with these well explained answers
I love how you guys include POC in your episodes. Thank you
These are my favorite videos. Knowledge sharing is my love language.
Very smart guy. Can tell how much he knows by how simplified the explanation is
4:00 He has that look I'm so excited talking about bridges but I am trying to hold it back some. Man loves what he does!
I love seeing my people doing great things. He worked hard and got where he wanted to, and thats commendable
I love this man. Every description is so easily digestible and sophisticated. Also, killer smile.💚
Fruity
I'm a civil engineer. Dr. Mabry did a great job representing all our disciplines.
One of the best guests of the series! Knowledgeable on so many specialist subjects and yet able to explain them so well.
Presentation is the best yet I've seen at explaining tough concepts in a way that people unfamiliar can understand. I'm not into civil engineering, but I am a bit of a math and science geek, so I'm not just talking my book! Thanks Dr Mabry, nice one!
Amsterdam (the whole of The Netherlands actually) has an amazing traffic design system too. Which also include loops in the roads to detect different types of traffic and can prioritize / switch traffic lights based on the actual current traffic. Not just an interesting grid but amazing NON car dependent traffic system 🙂
im about to graduate in civil. and when hes talking about some of the topics, it brings back a lot of the stress i had trying to pass these classes for the past 4 years lol
Get this guy a TH-cam channel. Well spoken and easy to understand
Coherent, easy to follow, well-spoken, specific, professional.
This guy rocks, what a great educator
loved this one! he seems like he's genuinely passionate about this topic
This was my favorite support video so far. Well done!
Ah, wish I paid more attention so I could submit a question! Hope he comes back for more. I want to know how engineers would redesign an existing city, including the demolition and construction processes!
I always love how engineers can take any question pretty much and give you a logical explanation.
It's an engineers job to find a solution to any probelm they're given.
When you get recommended a video on YT and you notice WHOA I went to undergrad with him. Hey Nehemiah!
Hey Ruthie! :)
16 minutes well spent learning a lot! Wow, this guy is incredibly knowledgeable and enthusiastic about engineering around the world. Awesome guest, thanks Wired, more content like this please.
This was such a refresher. I remember working on the idea of future cities in my schools ASCE chapter
This guy is the next MKBHD of engineering
he should come back
About demolitions:
You can use demolition charges only when many criteria are met.
Other times you use demolition equipment - usually heavy excavators with long booms and hydraulic hammers/ sears.
This was so interesting and he was so passionate about the topic! Loved this episode.
need more of this guy
Should've called it "support support"
That was one of the best support episodes yet!!!
This guy's fantastic. Knowledgeable, articulate, passionate. Thoroughly enjoyable video.
best part of these videos is appreciating how attractive it is when someone is talking about something they are passionate about
Explanations were excellent!!!
@10:48 - this makes me think of why my city (and surely most if not all), have "hard surface coverage" as part of zoning requirements if you buy land to build on. If too much of your property is covered with an impenetrable surface or too much overhand, you interfere with the way drainage efficiently works in the entire area!
This guy has a great presentation presence. Very entertaining to watch!
The dampers can be really cool if you do get a chance to see them. Highly recommend
This guy is insanely smart omg
Ikr😍
Lovely presentation! Enjoyed his explanations and his well-balanced approach in handling people's frustrations and the understanding that engineering designs might need to be revamped
We need a part two with him!
structural engineers are unsung heroes of the modern world.
Mechanical & Civil Engineering are so interesting. I wish I was proficient enough in my math skills to have gotten a degree in it.
Thanks for the simplified explanations.
This is awesome. Great leader for our future engineers.
RIP Baltimore Bridge 🌉
💯🙏
7:05 Got more poignant.
Should have called it Support Support
City Support is definitely my favorite support. More please
In Sydney, Australia we have a car tunnel under the harbour. This was built by dredging a channel, and then placing precast sections into the channel. There was no dam built, the sections were placed underwater and joined together, then covered. I don’t know if they were sealed or if the water was removed after. We now have a railway tunnel that was bored through. Sandstone makes it relatively easy.
I think it would have been appropriate to clarify that The Line is the dumbest and least feasible project ever.
What a lovely chap
He's really good at explaining things simply and precisely - even if you know the answer, it's a treat to watch an expert explain it so concisely
I've met Nehemiah in person at one of his SteMedia events. Brilliant and just an all around great guy.
👊🏾