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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…
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zzz
March 7, 2023 at 4:02 pm
Should have called it Support Support
Crypto McDuck
March 7, 2023 at 4:02 pm
😏ask “Larry Silverstein” how this is done properly! #neverforget911 💯
Marnis Antonites
March 7, 2023 at 4:15 pm
Bridges are built to last “Just 50 years”
Oh lordy
Christian Hansen
March 7, 2023 at 4:19 pm
cabled are being pooed___ yeah upon by pigeons! lol
Tony Tyler Draws…
March 7, 2023 at 4:24 pm
These are my favorite videos. Knowledge sharing is my love language.
Janet F
March 7, 2023 at 4:37 pm
This was a lot of learning fun, if only for the ba dum tss Dr. Mabry added to Chrissy’s question before answering😆✌
Eternal Being33
March 7, 2023 at 4:38 pm
I never knew that skyscrapers sway in the wind. My mind is blown.
Safak Ureyen
March 7, 2023 at 4:38 pm
Best urban plan definitely goes to either Barcelona or Prague. They’re like 101 for proper urban design.
Full Name
March 7, 2023 at 4:47 pm
Give it the ole 9/11
Dumb money
March 7, 2023 at 4:50 pm
How to take down 3 buildings with 2 planes?
maryriha
March 7, 2023 at 5:17 pm
Just the right amount of explanation for everyone to understand. This is good. I hope he makes more videos.
Annabelle Cupcake
March 7, 2023 at 5:18 pm
Great video! I love engineering 😄
IAmTheTanner
March 7, 2023 at 5:25 pm
someone should have asked him if jet fuel can melt steel beams.
colinstu
March 7, 2023 at 5:26 pm
5:39 isn’t one of the many values/points of an engineer is to size things appropriately? Wouldn’t need engineers if everything was stupid overbuilt (looking at you, Empire state building), but would also be way too expensive to build most things. I like how he breaks down rebar but kinda misses the point.
r
March 7, 2023 at 5:27 pm
i need him
Max Headroom
March 7, 2023 at 6:07 pm
Was the “cross joint” in the movie “Pineapple Express” really designed by a famous structural engineer?
(as the weed dealer in the film has a line that claims this to be the case!)
Michael Luong
March 7, 2023 at 6:20 pm
This was such an interesting video!
EngAidoo
March 7, 2023 at 6:58 pm
Great explanation.
K40l4
March 7, 2023 at 7:01 pm
I understood nothing.
M W
March 7, 2023 at 7:05 pm
Put Larry Silverstein as the owner of the building and doesnt matter the stories or if people are in it itll come down straight and probably make billions in insurance too
Bill T
March 7, 2023 at 7:12 pm
Who else had textbook pts after looking at the millau viaduct picture? 3:50
Jeff Thomas
March 7, 2023 at 7:13 pm
Just ask the American government… they did a perfect job of saftely collapsing the twin towers on 9/11
ProjectElf
March 7, 2023 at 7:29 pm
When ur country is being mentioned 🥰
Singaporean here
TheSoupin8or
March 7, 2023 at 7:49 pm
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
Josh Daly
March 7, 2023 at 8:16 pm
Isn’t the numbering of rebar based on the diameter in 1/8th inch increments? So a #4 bar is 1/2 inch and a #9 bar is 1 1/8 inch diameter.
Dr. Nee
March 7, 2023 at 10:10 pm
Thank you for this opportunity WIRED! I appreciate the comments as well 🙏🏾
bolu gbadebo
March 9, 2023 at 10:35 am
Well done!!
Journey w/ Doughs Bakers
March 9, 2023 at 12:22 pm
This was a excellent explanation Dr. Mabry!! #EnterToLearnDepartToServe 💙💛
Ahhhhhhhhhh....
March 9, 2023 at 7:27 pm
Hey! Can you explain zero force members?
Lance Ballstrong
March 12, 2023 at 6:09 am
Impressive knowledge and ability to communicate it. Someone put this man in charge of more important decisions in this country. My city could sure use him.
MaxineShaw
March 13, 2023 at 10:41 am
@Lance Ballstrong 💯 It was his respectful consideration of the collective & nature within the answers that stood out the most to me. Great video. 👏🏿
Chong Wei with a Than
April 4, 2023 at 10:52 am
I enjoyed this so frikin much thanks
AminalCrackers
April 6, 2023 at 12:05 am
@drnee #9 rebar isn’t 1″ in diameter, I’m gonna have to take your PE stamp away. #9 is 1-1/8″. #8 is 1″ diameter. Where do I go to get my prize?
Spoken Truth
April 6, 2023 at 6:44 am
As a black structural analysis engineer, love seeing you on here!
RGMS
April 9, 2023 at 2:15 am
Thanks for the free class Doctor
Monte Stewart
April 9, 2023 at 1:24 pm
Black excellence 👍
You Call That a Knife?
March 8, 2023 at 8:54 am
This guy has some serious eyebrows!
maxim menage
March 8, 2023 at 9:11 am
Tornados in London?
Roy. E Summers Jr
March 8, 2023 at 9:52 am
Here’s my dilemma here’s my dilemma how come scientists haven’t created a way to start pumping groundwater back in when we’re having heavy rains and flooding pump the water back into the ground water systems to be able to utilize the Earth as a built-in Reservoir now that we’re starting to have additional rains why don’t we replenish our ground reservoirs underneath cities in States why can’t we pump the water back into the Earth if we can take it out we can put it back in
Lovin_NY93
March 8, 2023 at 9:57 am
Love his North Carolina accent. Reminds me of someone I used to know who I miss dearly. (now I sound like an old person using facebook)
Schrader
March 8, 2023 at 10:02 am
9:38 – A, B or City 😀
Prototype 81
March 8, 2023 at 11:13 am
How to bring down a city tower in a safe and straight down manner.
Fly a plane into the building next to it.
TheArtistDT
March 8, 2023 at 11:56 am
this guy looks like the older, structural engineering brother of caleb mclaughlin
ExoDeus
March 8, 2023 at 12:05 pm
You gut out the insides. Set charges. Then fly two empty remote controlled passenger planes into the buildings.
Mike
March 8, 2023 at 12:18 pm
Ask the people who demolished building 7
Chad Wilson
March 8, 2023 at 12:25 pm
What other options are there if you cannot deconstruct a building with explosives? For example, what if a building on Long Island needs to be taken down? Those skyscrapers seem to be awfully close to allow for explosives.
Max Gray
March 8, 2023 at 12:38 pm
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!
ᴛᴇxᴛ ᴍᴇ ᴏɴ ᴛᴇʟᴇɢʀᴀᴍ @WIRED_2
March 8, 2023 at 12:52 pm
Thanks for watching and commenting, contact me👆i have something special for you..
Boleniana
March 8, 2023 at 1:16 pm
14:00 that was my old job, breaking concrete cylinders and recording the data
Torben Stegmüller
March 8, 2023 at 2:13 pm
This was so interesting and he was so passionate about the topic! Loved this episode.
mysticery
March 8, 2023 at 2:22 pm
Singapore, represent!
LIL Odinson
March 8, 2023 at 2:47 pm
Jidion?
Renam Martinez de Oliveira
March 8, 2023 at 2:59 pm
I could have sworn I heard Niemeyer…
Lisa Brown
March 8, 2023 at 3:28 pm
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).
masterimbecile
March 8, 2023 at 3:47 pm
Hi, I am a load-bearing wall. This is
Structural support.
Avery B.
March 8, 2023 at 4:09 pm
Oakwood University in the building!
Extra Victory
March 8, 2023 at 4:16 pm
The dampers can be really cool if you do get a chance to see them. Highly recommend
Hope Gold
March 8, 2023 at 5:56 pm
I swear I’m not a conspiracy theorist. But if it’s so tricky to get a building to just pancake straight down, why did both the twin towers?
vincent dyer
March 8, 2023 at 5:57 pm
This is top 5 educational series on the internet
Sean Donohue
March 8, 2023 at 6:31 pm
“Asked” or “axe”? 😂
xDaVincic
March 8, 2023 at 7:04 pm
Rebar fabricator and former concrete laborer here. The rebar number represents the diameter in relation to eighths of an inch. Number 8 is 1 inch-8 eighths of an inch. Number 9 is larger than an inch-9 eighths of an inch
Funk Machine909
March 9, 2023 at 5:48 am
only in america are these people calling themselves “doctors” even tho their titles has nothing to do with being an actual doctor lol
Majid
March 9, 2023 at 6:10 am
This is nice there are so many wise and smart people that want to talk about their job! I can see schools showing clips of these to kids maybe a compilation could be made in order to inpire kids without dumbing it down.
Remus1033
March 9, 2023 at 6:13 am
Dude just described the whole 9/11 – process
JUICE
March 9, 2023 at 7:08 am
This was so good!
Nad Dela Cruz
March 9, 2023 at 7:27 am
He looks like kyrie and cp3 but fatter
Donald hysa
March 9, 2023 at 7:31 am
An engineer who is also a doctor?! Amazing!
xihang yang
March 9, 2023 at 8:08 am
9-11
Scrumptious Red Beans
March 9, 2023 at 9:01 am
What is your opinion of Neom
Nehemiah Stewart
March 9, 2023 at 9:31 am
Hey I know this guy. Hey Nehemiah!
Bill Simonis
March 9, 2023 at 9:52 am
My dad was a mechanical Engineer who specialized in vibrations.
But this was quite interesting.
DennisDeSlager
March 9, 2023 at 10:37 am
Missed the chance for ‘Support support’
Tesla Ranger
March 9, 2023 at 10:41 am
How do you demolish a 28-story building? Well, *that’s* an awfully specific question…
ARTUR MARTINS REZENDE
March 9, 2023 at 11:09 am
this guy made Structural Engineer interesting, bring him back pls
Vancity Band
March 9, 2023 at 12:03 pm
Thank you for putting the thumbnail question first, instead of burying it at the end in a clickbait manner.
1986subway
March 9, 2023 at 12:18 pm
What about 2 100 story towers right next to each other? 2 planes should bring the down clean right?
G C
March 9, 2023 at 12:23 pm
Sounds llame 911
Reggie Taylor
March 9, 2023 at 1:01 pm
Nice Nehemiah! I always wondered about underwater tunnels!! Ha ha! Love this!!
777Skeptic
March 9, 2023 at 1:35 pm
8:00 Another explanation is, you’re just remembering the times you’re stopped at red light, and forgetting the times you run a green.
Hitting red makes you feel inconvenienced, frustrated, and wronged. Hitting green elicits 0 emotion.
Chance Webster
March 9, 2023 at 2:10 pm
Just asking for a friend
Gabe Schleifer
March 9, 2023 at 3:19 pm
“How do you safely demolish a 28 story building.”
With great caution, I presume.
Ferry van Tichelen
March 9, 2023 at 5:26 pm
Absolute BILF
FowCrog
March 9, 2023 at 5:38 pm
That’s the next big game. Structural Engineer simulator, safely demo structures without damaging surrounding facilities.
Isaiah Soto
March 9, 2023 at 5:49 pm
sounds like 9/11
Samuel Clark
March 9, 2023 at 6:23 pm
Great engineering knowledge and great explanation skill but a lot of these answers should’ve been directed at urban planners. The line for example, is significantly less efficient than a regular “hub and spoke” or circular design when considering transit. Building up is great, but building too far out always creates problems. He mentioned good reasons to not have elevated subways in NYC, but a reason he missed is the impact of all that above ground infrastructure on the already very narrow streets.
Jamar Jobs Premium
March 9, 2023 at 7:01 pm
City Support is definitely my favorite support. More please
P A
March 9, 2023 at 8:58 pm
How did jet fuel melt steel beams?
Alex Hunt
March 9, 2023 at 10:04 pm
Ah thats how they did 911, cheers.
nobody nowhere
March 9, 2023 at 10:14 pm
Chicago: “Oh no we’re drinking our own polluted water
Reduce pollution ❌
Redirect the river ✅
Jill Knapp
March 9, 2023 at 11:08 pm
Thank you, Dr. Mabry!
8happyperson
March 9, 2023 at 11:44 pm
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.
CockatooDude
March 10, 2023 at 1:01 am
Why would you ask a structural engineer about urban design? Completely different disciplines.
John Scaramis
March 10, 2023 at 4:24 am
6:04 Concrete’s compressive strength is higher than is quasi-nonexisting tensile strength. However the compressive strength of concrete is still much smaller than that of steel (however there are some high-tech concrete variants that can reach the strength of mild steel).
Then why use concrete? Because the ratio of costs to strength is much lower for concrete compared to steel. And it’ easier to pour concrete and make planar substructures 😉
John Scaramis
March 10, 2023 at 4:30 am
10:52 I’ve been regurlarly working in Dubai for the last years. No drainage at all. For the short rainfalls here and there this is OK. But if the rainfall lasts a few days (which happened a few years ago), life becomes complicated, as nobody is prepared for such amounts of rain
BlahBluBlu
March 10, 2023 at 9:59 am
He said affordable housing 🙏🏽🙏🏽🙏🏽
Pat Hindsley
March 10, 2023 at 10:06 am
8:47 Great analysis. I would have also included that some lights are intentionally phased to prevent speeding and increase pedestrian safety.
H W
March 10, 2023 at 12:38 pm
lost all respect for wired as a media publication after reading their hogwarts legacy review
AwryBowTie
March 10, 2023 at 3:07 pm
WIRED continues to deliver with their experts on Tech support!
Omar M.
March 10, 2023 at 3:22 pm
@13:09 – I think he meant dense or compacted sand in this scenario as loose sand is not that great.
norezen
March 10, 2023 at 10:00 pm
This guy has not watched “not just bikes”
Actually he might have, but the editor did not.
He is correct naming Amsterdam, but like 9 1-word cuts later he’s talking about canals.
The reason Amsterdam is such a good design, is because it prioritizes pedestrian and bike traffic, not motorized vehicles. That might be due to canals in a round-about way, but its not because “canals.”
Laura G
March 10, 2023 at 11:22 pm
50-70 years?!
Braden D
March 10, 2023 at 11:47 pm
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!
Megan Pinkerton
March 11, 2023 at 3:19 am
Learning about NEOM was fascinating! Have all travel condensed to 1 line is what sold the idea to me. Also the layout seems smart. Residential as the border of the line and all community related things located in the center makes it easy to access. I hope they build it one day!
Truth be told
March 11, 2023 at 4:25 am
best part of these videos is appreciating how attractive it is when someone is talking about something they are passionate about
TPAMMT
March 11, 2023 at 8:41 am
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.
MalikEmmanuel
March 11, 2023 at 10:01 am
Am I the only one who thought that first question was about 9/11?
Flux_Time
March 11, 2023 at 11:11 am
Safely demolish a 28 floor building? Idk ask our govt. They did it 3 times with two airplanes in 2001
Angi Dudas
March 11, 2023 at 12:57 pm
I don’t have a huge interest in the subject, but after the bridge collapse in Pittsburgh and much more interested. The city of Pittsburgh would do well to hire this gentleman because we could use him.
Peter Sage
March 11, 2023 at 1:19 pm
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.
Just Some Guy With No Mustache
March 11, 2023 at 3:03 pm
6:27 it kinda looks like he’s holding a cigar LOL
Fabrice Mikobi
March 11, 2023 at 8:44 pm
Very knowledgeable guy. Good stuff
Joshua Edgar
March 12, 2023 at 4:33 am
We need a part two with him!
ᴛᴇxᴛ ᴍᴇ ᴏɴ ᴛᴇʟᴇɢʀᴀᴍ👉Wired0111
March 12, 2023 at 10:45 am
🎉🎉🎉🎉🎉.
Abby 217
March 12, 2023 at 11:08 am
God help me with my calculus and physics😭
Lily
March 12, 2023 at 12:58 pm
shooting a rope across to make a bridge sounds hilarious lol
Bruce Ludlow
March 12, 2023 at 2:12 pm
What is the civil engineer plan for the very near future for our cities, say 2030s-2090s?
Do you support the abolishment of cars? If so, what is the plan for giving the people back their land, all the land ceded to car and oil companies?
There is only about 3 billion EVs’ worth of mineable lithium reserves, so unless the plan is to simply return to fossil fuels by the end of just this century, surely there is some plan to revert our city design back to before we let capitalists turn all our roads into death traps and 50% of open space into parking lots.
Or is that just a problem we leave for our grandchildren?
Joshua Franklin
March 12, 2023 at 3:35 pm
SpaceX intern answers college recruiting questions👀
Romano338
March 12, 2023 at 3:35 pm
Can conform a whole lot of maths is involved. At schoold I had a class called dimensioning of structures, where we were taught how to dimension structures, considering the different forces applied on it (wind, its own weight, cars,…). It was a NIGHTMARE of calculations. Maths everywhere. Yikes.
Rodrigo Guerra
March 12, 2023 at 4:09 pm
Is Nehemiah name inspired by the architect Oscar Niemeyer? The pronunciation is very similar
George Nassar
March 12, 2023 at 4:38 pm
Bro the skyscraper damper counteracting wind thing did NOT make me feel any better about it
Corey Holt
March 12, 2023 at 4:50 pm
Just hit it with a plane, then it’ll freefall straight down into its own footprint, right?
Mila S
March 12, 2023 at 5:33 pm
Great vid!
Matt Roberson
March 12, 2023 at 8:38 pm
My mechanics of solids professor. Got my diploma 🙏🏼 shoutout Dr. Nehemiah Mabry!!
Subhranil Dey
March 12, 2023 at 11:23 pm
Some good questions u know
Mark Benn
March 13, 2023 at 1:24 am
Great display of how well versed civil engineers are in so so many important topics
Blaze Off
March 13, 2023 at 2:02 am
Ralphael why are you here
Leila Movieclub
March 13, 2023 at 3:48 am
YEEES finally 😍
flutterbyby
March 13, 2023 at 5:15 am
Loved this presenter & presentation, please bring him back!
Super Boy
March 13, 2023 at 5:41 am
Went to toilet with this guy. Well done Nehemiah.
Thokozani Tshabalala
March 13, 2023 at 12:47 pm
Nah we need to bully whoever leaves hate comments here😤, they not welcome!!🙅🏾♂️
zefphyrz
March 13, 2023 at 1:09 pm
Wayne Brady?????????
Max Vega
March 13, 2023 at 2:11 pm
9/11/01
Chicken Nugget
March 13, 2023 at 5:05 pm
I Loooved his presentation! And really appreciate the acknowledgment of Indigenous and cultural ingenuity!!
Carmen Shi
March 13, 2023 at 5:39 pm
the one about above or under ground for NYC trains, it really depends, even with weather bc the amount of times routes were affected by a flood, it is ridiculous
右手
March 13, 2023 at 9:01 pm
One of the most straight forward person who appears in tech support. Someone who I want to talk all day long.
Danny Adair
March 13, 2023 at 10:04 pm
Really enjoyed this brilliant man’s accessible explanations. Bring him back for round two!
Sharin Berman
March 14, 2023 at 9:26 am
This guys enthusiasm is infectious! And I love his little Brio Train bridge, perfect touch.
NefastusJones
March 14, 2023 at 10:48 am
Great video. Learned a lot.
dubreil07
March 14, 2023 at 2:23 pm
Most of the subway stations in nyc are above ground once you leave Manhattan
Garrett Hatcher
March 14, 2023 at 6:33 pm
Looks just like how the twin towers collapsed
Sed Led
March 14, 2023 at 6:33 pm
Mechanical Engineers Next. Civil is the oldest but Mechanical is the second
MrBeast
March 14, 2023 at 10:48 pm
anyone can build a bridge. It takes an engineer to barely build one.
Jebi
March 14, 2023 at 11:41 pm
He got the formula for stress wrong. Wow.
Ebere Anyanwu
March 15, 2023 at 3:50 am
Wired brings the best guys for this series
Richard Samuelson
March 16, 2023 at 12:38 am
Wait, you’re a civil structural engineer?
I really hope there’s not that many uncivil structural engineers; that’d be uncomfortable.
purp jones
March 16, 2023 at 12:43 am
The same way they the twin towers is the answer
VeeNee
March 16, 2023 at 1:18 pm
Nah bro, please tell me he didnt mention the line as optimal city design
Juan Doradea
April 7, 2023 at 2:34 pm
Very informative!
acutelychronic
April 7, 2023 at 2:49 pm
structural engineers are unsung heroes of the modern world.
Haas
April 7, 2023 at 4:46 pm
Sure look like 9/11
Sarpreet Matharu
April 7, 2023 at 7:20 pm
Suspension bridge is god
Radishh64
April 7, 2023 at 8:01 pm
bro im so scared the concrete and other rock are going to fall and scratch the computer 8:40
Cuckbutt
April 7, 2023 at 8:32 pm
JET FUEL CAN’T MELT STEEL BEAAAAAAANNNNNS
Cuckbutt
April 7, 2023 at 8:33 pm
BUILDING 7!!!!
RTS
April 7, 2023 at 9:28 pm
first one sounds a lot like what happened to the twin towers🤔🤔🤔
mostly nobody
April 8, 2023 at 1:08 am
As a Cleveland native I always wonder about the crumbling bridges.
Kortez
April 8, 2023 at 9:34 am
Lets go Jidion
Kaleidoscopic Flight of Fancy
April 8, 2023 at 1:40 pm
What a yummy human 😏😈🥰
Domo Grant
April 8, 2023 at 8:04 pm
ya’ll didn’t block the apple logo on all angles btw
Madison 3
April 8, 2023 at 10:55 pm
This was actually a very fun video 👍🏾
Maddolis
April 9, 2023 at 12:31 am
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!
Ye 7l
April 9, 2023 at 1:58 am
First 30 secs he explains how they did 9/11. Stay woke
Matthew Garbe
April 9, 2023 at 3:50 am
Yes!!! I ask myself this question every time I see one
ModernDev CoD:M
April 9, 2023 at 9:08 am
nice
Richard Nicholson
April 9, 2023 at 9:09 am
Why as soon as he explained the first question I thought exactly of 9/11 🤦🏽♂️🤦🏽♂️. We really got bamboozled.
liljojo3101
April 9, 2023 at 9:48 am
This was FASCINATING
livingitup365
April 9, 2023 at 11:30 am
Daniel
April 9, 2023 at 2:44 pm
yall should do one but with a mechanical engineer
Nxbxrx
April 9, 2023 at 4:18 pm
“How do you safely demolish a building?” – like how they did the twin towers.
Britzie'
April 9, 2023 at 5:09 pm
Within the first minute of this video Dr. Nehemiah Mabry debunked 9/11
Edwin Hernandez
April 9, 2023 at 6:34 pm
Can you guys do construction engineering next 🙏🏾 thanks