Surfside Condo Collapse: What We Know So Far

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On June 24, 2021, a portion of Champlain Towers South, a 12-story condominium in Surfside, Florida, near Miami Beach, collapsed around 1:30 am. It was one of the most deadly structural collapses in U.S. history. This video summarizes the events of this unthinkable tragedy, a few of the structural engineering issues that may have played a part, and finally the process of forensic structural investigations.
Links:
-My playlist on concrete can be found here: • Concrete Series
-Thanks to‪@Mike-Bell‬for sharing his animation of the collapse. He has a lot more great info on his channel.
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Practical Engineering is a RU-vid channel about infrastructure and the human-made world around us. It is hosted, written, and produced by Grady Hillhouse. We have new videos posted regularly, so please subscribe for updates. If you enjoyed the video, hit that ‘like’ button, give us a comment, or watch another of our videos!
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DISCLAIMER
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This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All non-licensed clips used for fair use commentary, criticism, and educational purposes.
SPECIAL THANKS
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Stock video and imagery provided by Getty Images, Shutterstock, and Videoblocks.
Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License
Source: • Elexive - Tonic and En...
Producer/Writer/Host: Grady Hillhouse
Assistant Producer: Wesley Crump
Script Editor: Ralph Crewe

Опубликовано:

16 авг 2021

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Комментарии : 3,2 тыс.

@PracticalEngineeringChannel 2 года назад

👷 Check out my coverage of other engineering events: ru-vid.com/group/PLTZM4MrZKfW_kLNg2HZxzCBEF-2AuR_vP 🏗 Josh Porter is a structural engineer who has produced a series of deep dives into various technical aspects of this collapse on his channel, Building Integrity. Watch his playlist here: ru-vid.com/group/PLQw1wzpZL_lovGG_jMIDwfS_a9uaGrdh- 🚧 Mike Bell, whose animation was featured in this video, also has some excellent videos about the collapse. Watch them here: ru-vid.com/show-UCtNduBGCcBzSS2IMRMbFFkQ

@AkariInsko 2 года назад

@StephenMortimer 2 года назад

UNTHINKABLE ?? poor choice of word

@foowashere 2 года назад

The Building Integrity channel (Josh) is highly recommended. Absolutely top notch details.

@gus473 2 года назад

👍🏼 Thanks for the recommendations, Grady! BTW, one of the kids gifted me a couple of your sponsor's prepackaged meals, and they were as good and easy as you described!

@vectorpacer2063 2 года назад

Hey keep doing this series it fells like a movie that i wait for weeks !

@leland818 2 года назад

It is touching that you started off with the “in memory of“ page. You’re the first person I’ve seen do that. Thank you

@LillaVya 2 года назад

@@leland818 Concerning Edit 2, pretty sure that it's exactly what happened

@iciajay6891 2 года назад

@@LillaVya yes. As I checked, seems to have deleted.

@TheDoctor1225 2 года назад

@@leland818 Exactly what happened, as that person's comment is not there, and they are not on my list of blocked people. Tells you all you need to know about them, the worth of their comment, and their complete lack of courage or even decency.

@leland818 2 года назад

@@TheDoctor1225 / very true! I included a screen shot of the notification in my edit for you. It’s cut off but you get the gist

@samholdsworth3957 2 года назад

Did you pause the screen and actually read every single name? I sure as hell didn't

@ocadioan 2 года назад

I just want to point out how uplifting it is to see a channel about engineering get to 2.22 million subscribers without having to resort to flashy clickbaity content.

@kturby5489 2 года назад

*Cough Cough* that Jeff guy on here who is about as sleazy and gross as they come.

@4951----- 2 года назад

Best thing to fall a sleep to ☺️

@KaldekBoch 2 года назад

Veritasium did a good video recently on the difference between good and bad clickbait (good being thumbnails that pique interest in the right way).

@covidhoax7646 2 года назад

Despite what commie propaganda tries to make you believe, there are many smart and curious people out there.

@edwardschmitt5710 2 года назад

Because 1% of the population is intelligent.

@gtipp10 2 года назад

This video is so well done on many levels. The memory page at the start should be on all content about life ending events. As an engineering geologist I appreciate the high level of distinction between what is known, what is not and what it opinion.

@therilyncobrin2372 2 года назад

True. The way he handled the recent and potentially hurting topic was well done and very clear. I heard the music wrapping up and half expected the following sponsorship before noticing and appreciating the fact that there was none.

@RNCHFND 2 года назад

@@therilyncobrin2372 The final music was too upbeat for the subject, but the video is great nonetheless

@DoctorX17 2 года назад

Yeah, he handled this perfectly. No sponsors, no ads, only respect for those who lost their lives and a good explanation of what we know and don't know.

@kimberlyperrotis8962 2 года назад

As another engineering geologist, so do I appreciate that.

@perfectsplit5515 2 года назад

I had my engineering students watch part of this video.

@jboogie8369 2 года назад

Props on forgoing the usual "more on that later" sponsor. You are a class act and I'm happy to have my five year old learn from you.

@heh2393 2 года назад

Not meaning to be rude but how does your 5 year old understand all this? Just asking because I am curious, nothing more.

@jboogie8369 2 года назад

@@heh2393 well, he doesn't grasp most of the particulars of the content but thanks to things like the googly eyes that Grady puts on models, he wants to watch it with me and always asks lots of questions. It kind of depends on the video - some of Grady's videos are really accessible and others will be better for him in a few years.

@richblumenthal9614 2 года назад

J Boogie, I am a retired engineer. When my son was little we would play with construction toys, assemble whatever needed to be put together, and learned about tools, materials, and technology. He's now 31 and successful as a manufacturing engineer with a biomedical company. I'm getting a good feeling about your son's future.

@noahbriske839 2 года назад

Yeah great, congrats on putting your toddler in front of a device to avoid responsibility. Those tablets sure are a great babysitter

@dambien 2 года назад

@@noahbriske839 5 years old is not a toddler, and "he wants to watch it with me" plus "asks a lot of questions" is not avoiding responsibility. Why so bitter?

@DigitalNeb 2 года назад

I'm a building contractor here in Florida, and I'm completely appalled at the amount of deterioration I'm seeing in these photos. I'm finding it hard to understand how the urgency of this damage was easily apparent. I can't wrap my head around it. I build a residential single family dwelling, and I have to go through SOOOO much engineering, inspections, and ongoing education. These guys have a high rise building under their care, and they don't even have an understanding of the structural requirement needed to keep it standing. This astounding to me. I just can't believe it. What a mess, and what an easily avoidable tragedy.

@rosemarymcnally100 2 года назад

I'm truly sorry. But a house I designed and drawn up by a pro. Than built. By a local builder hat kept passing each phase my beautiful home that was designed for spec. I put the flaws on the builder yes. But more so the men or persons that approved each phase of the house should be fired as well as the builder. And prosecuted. When I put the house up for sale an inspector for a buyer found 11 pages worth of serous flaws. Costing me another $250.000 to repair. Even at that a leak was never found. the house way below market price .with the buyers aware of leak... The husband of buyers quickly found the leak in a smaller bed room. After several other home inspectors said it was coming from the master deck. Well 3 times the deck was re built with no luck for leak while the story ended up well .it did not for me.. I should have sued Volusia county I nspectors as well as the builder .but after 5 years of hell and bad health I was just and lack of money .I deside not worth the effort.

@DigitalNeb 2 года назад

@@rosemarymcnally100 well it sounds like you had a really bad experience. I'm not sure how any normal sized home could have $250,000 worth of repairs, but OK. Many of the homes in my area sell for that price new. If there really was that much damage, then you absolutely should have sued the builder. And should still sue them. A building contractor in the state of Florida has a tacit responsibility the lasts the life of the home. If you incurred a quarter million dollars worth of costs because of something he did wrong, then you could absolutely take him to court and win. He has to have at least a million dollar insurance policy to be operating with a license.

@JTA1961 2 года назад

Change understand to underSAND & that tells me ALL I need to know about FL00R~Rid~Duh...

@member5488 2 года назад

All that exposed rebar was horrifying.

@SFKelvin 2 года назад

It's possible organized crime raided the maintenance fund and it was easier to just destroy the thing and collect insurance. Lots of mob activity down there.

@sixstringedthing 2 года назад

The "In Memorium" before the video even began is entirely appropriate. Let us never forget that these lessons are written with the blood of innocent people. Thanks for this detailed debrief Grady.

@sergarlantyrell7847 2 года назад

Technically, they were joint owners of the building, so ultimately they (along with the ones who survived in the other half) were responsible for its upkeep and eventual collapse...

@CMDRunematti 2 года назад

sounds to me the lesson was already learned and this current bloodshed was not necessary. its just that someone didnt take the updated building codes seriously enough to tell the owners about the possible collapse. maybe even force an eviction because of the building being unsafe.

@pvic6959 2 года назад

the moment I realized that these people were probably nicely asleep and then suddenly they were falling is just heartbreaking

@zzstoner 2 года назад

Agreed. I paused the video for at least a few minutes to go over all the names, and then again their ages, to think of the lives that were lost, and what stages of life they were in.

@justaskin8523 2 года назад

@@zzstoner Yeah, for sure. I keep going back to that one guy's story about how his girlfriend asked him to spend the night with her. He decided to do just that, and he avoided death. That's just mind blowing.

@k2sk8er1244 2 года назад

Grady, the memory page was a very respectful touch. As a civil engineer I really appreciate your content. The information you present is researched, technically accurate, and explained in a way that everyone can understand. It's critical that we examine and learn from disasters such as these and a forensic approach is the only way forward. I am often in a position to make similar recommendations to my clients about the state of their facilities after a visual review, and it's disappointing when they choose not to act despite being presented with the risks. I'm not sure I would ever use the word "exponential" in a report recommendation, but this incident will give me pause next time. Keep it up!

@rayradiance666 2 года назад

Can’t believe this happened in June, it feels like it happened a week or two ago, this summer has gone by so fast, it’s crazy

@tspopstar512 2 года назад

Honestly so much shit was happening this year I didn’t realize ever get a chance to focus on this

@codymachado 2 года назад

Fastest summer ever

@masterprocrastinator8521 2 года назад

This may sound weird but I appreciate the memorial at the beginning of the video, helps remind us that this isn't JUST a case study. Families, right now, are affected by this tragedy and that lives of all ages were lost

@HVolnWhatnow 2 года назад

It was a reminder I needed, honestly. I clicked just kind of expecting/hoping for a clinical, by the numbers breakdown of structures. Then seeing the first name in the memorial listed as one year old smacked some sense back into me.

@gopikrishnanasha976 2 года назад

Yes.. Indeed.. ♥

@jonaskonrad 2 года назад

Reading such young ages made me feel sick in the stomach. Shows what responsibility we civil engineers have...

@iwontliveinfear 2 года назад

My wife and I were thinking of buying a condo in an older building in Tampa. Now she is refusing to even consider it.

@cc_jmk 2 года назад

The change on the intro is also fitting imo.. as soon as he was wrapping up the spoken intro after the memorial, i thought how weird the happy, pump-it-up intro music would be for this video, and was pleasantly surprised. great tact Grady.

@Mercurius314 2 года назад

I so much appreciate you taking the time to explain what is going on from an engineering perspective, in a respectful manner and without dragging in politics or sensationalism. Thank you Grady!

@Tjousk 2 года назад

Indeed

@Malik-dy3xk 2 года назад

Sometimes it's indeed due to corruption which is only lead by such politicians

@bobbypatton4903 2 года назад

A good example of why we need to start electing scientists and engineers into our leadership!

@bixmcgoo5355 2 года назад

Damn shame the politicians who allowed this wouldn't do the same

@taekwondotime 2 года назад

I think it's pretty obvious who's to blame: The owner of the condo building who neglected the required maintenance as clearly specified by the engineer who reviewed it in 2018. The report couldn't have been any more clear. The engineer said the structure needed repair immediately to remain safe and those repairs were never made. The building would collapse a few years later. This is a common occurrence in every industralized nation in the world. They have engineers examine the safety of a structure, and then nothing happens after the report is filed. There is no legislative "teeth" to force the owner to make the necessary corrections. They can blatantly disregard any safety report from any engineer and continue on as is. What needs to happen is legislation that forces an evacuation of the building and marks it as a condemned building UNTIL the repairs are made for it to reopen... but nobody will ever enact such legislation.

@dannedifyoudo 2 года назад

I absolutely appreciate these “what happened” breakdowns of real things. Please keep em goin!

@raven4k998 2 года назад

it was a poor design lack of maintenance and worse of all people turning a blind eye to the water leakage issues

@perfectsplit5515 2 года назад

The technical issues are very complicated.

@CinciJeff 2 года назад

Whenever I see broken reinforced concrete with rusty exposed rebar I'll remember your explanation. Makes perfect sense but I never considered that the steel expands as it corrodes - essientially "popping" the concrete from the inside out. Also kudos for presenting the entire video in a sensitive and non-judgmental manner. Great job as usual!

@JelMain 2 года назад

The modern standard uses stainless steel rods. Buildings in the 1950-80 period also saw concrete used which retracts slightly as it dried, allowing air to surround the rods which then facilitates water infiltration through capilliary action and the surface tension of the water. It bedevils London's concert halls, as the bars then resonate to the acoustics.

@Theonlyshows 2 года назад

Thank you for posting this detailed analysis. My dear friend Theresa Velazquez perished in this tragedy. Nothing can bring Theresa, her parents or the 90+ other victims back. Beginning to understand why this happened, how, and what is being done to prevent it from happening again, however, can give survivors and their loved ones a chance to begin to heal from this unspeakable catastrophe. Thank you again.

@mathematics117 2 года назад

I'm sorry for your loss. I hope understanding this disaster can pave the way for better regulations on inspections and maintenance so this never happens again. Iam so sorry for your loss and sending love to you as well as the families affected

@carolinevs943 2 года назад

This must be heartbreaking for you :(

@kencarp57 2 года назад

So sorry about the loss of your friend in this tragic collapse.

@justsomeoneonline437 2 года назад

I’m sorry for your loss.

@ethandewicki576 2 года назад

I lost one of my good friends in an aviation accident that killed him, his mom, and his dad who was flying the single engine plane. Similarly, it was reading the NTSB crash report that brought me some peace. When I saw this building collapse on TV I felt bad for those who were friends with or family with the victims. Getting closure is so slow, and sometimes you feel you're taking steps backwards rather than forwards when trying to move forward from it, but you eventually get through it as hard as it is. Sorry for your loss, brother 🙏 😔

@19TheChaosWarrior79 2 года назад

Your videos tackle some deep subjects without sensationalism

@gus473 2 года назад

👍🏼 It's why we all watch! A lot of "news media" might take a cue from this.....! 😎✌🏼

@Wyvernnnn 2 года назад

If he titled it "A 12 story building collapsed in Florida. Here is what we know so far", it wouldn't be worse, yet he would get more views. Sensationalism isn't always bad. Sensationalism makes your video more seen on RU-vid, he would educate more people and have more budget that way ; plus, it wouldn't necessarily be a douche move either.

@letsburn00 2 года назад

RU-vid is great because it allows people who want their niche topics covered. Sadly, at least 60% of people would rather sensationalism than detailed analysis that is calm and slow. That is a niche. History channel is like that because it's garbage gets more views in the short term than detailed analysis like this. Even this event is full of theories which have zero evidence other than "I saw it in Facebook". But a huge number of people believe.

@austinthacker7589 2 года назад

I love the way he doesn't go out of his way to point the blame at anyone in particular, simply what happened and how.

@RainyDayBricks 2 года назад

Agreed

@brandonmcmahan676 2 года назад

From someone unconnected to the tragedy, it seems like you did a pretty good job sticking to the information available at the time of the video's release for the engineering-oriented content. Starting out with an acknowledgment of the lives lost was a very tasteful way to initiate this discussion.

@perfectsplit5515 2 года назад

I can just hear their terrified screams. I wonder if it like that on the Titanic, or at the World Trade Center. Maybe this tragedy will become a segment on 1000 Ways to Die. :(

@thebeaz1 10 месяцев назад

From someone unconnected with the tragedy ,That's fairly sick.

@mniles 2 года назад

In Cologne, Germany in 2009 the city archive collapsed because of a train station being built under it. I think that would make a pretty interesting video too. Love your videos Grady!

@kvakerbillduck9500 2 года назад

If you remove ground under building, gravity will win. who would think about that.

@wakerobin9215 2 года назад

@@kvakerbillduck9500 by this logic, no one should build bridges either

@perfectsplit5515 2 года назад

@@wakerobin9215 Well, nobody has to dig holes in order to build bridges, so maybe that's not really an accurate analogy.

@mniles 2 года назад

@@kvakerbillduck9500 there are plenty of buildings with subways underneath. not all of them collapse. the interesting thing about a video about the city archive collapse in cologne would be to find out exactly how they messed up. grady has made videos about crane collapses and how they are usually caused by not reading the manual properly. "if you don't read the manual on a multiple story high industrial tool, something bad is bound to happen. who would think about that" is your logic applied to those videos, but that doesn't make them any less entertaining.

@glewglew9852 2 года назад

@@kvakerbillduck9500 subways and tunnels for cars exist you know....

@SpicyFiur 2 года назад

Seeing the collapse itself is scary. Just having in mind that there are still people inside that building - some injured and trapped many instantly crushed. Wow...

@tissuepaper9962 2 года назад

Yeah it's pretty hard to watch the video while thinking "WTF! I just watched 100 people die" Crazy what kind of shit people will do to save a buck, even in safety-critical applications. Absolutely crazy.

@Thefuryspeed100 2 года назад

Its frightening to think that they had seven minutes of notice before the building fully collapsed

@kriegscommissarmccraw4205 2 года назад

Not really. Human bodies are surprisingly durable, they likely suffocated.

@hellomistershifty 2 года назад

@@kriegscommissarmccraw4205 Under the force of thousands of tons of falling steel and concrete? I wish I shared your optimism for how resilient our bodies are

@kriegscommissarmccraw4205 2 года назад

@@hellomistershifty nobodies living in the bottom layers without being crushed, but a good a chunk of the people dead are from suffocation.

@JustaReadingguy 2 года назад

Love your stuff. Also, you have helped save a few bridges in town. I like to walk when I noticed excessive concrete cracking in one bridge. After watching your series on concrete, I alerted the city engineers. They implemented some repairs to the bridge. They also did other repairs to other bridges in town. So, thanks for saving our city money and improving our safety. THANKS!

@eyesofstatic9641 2 года назад

Wow that's pretty awesome! Good job!

@Lilliz91 2 года назад

Wow I wouldn’t even think anything of most of the things. Wouldn’t even know who to contact.

@suntzu6122 2 года назад

Literally saving lives from youtube videos lol.. wow nice man.

@benmgoldberg 2 года назад

That sounds like a fantasy version of the country I want to live in… unfortunately this is not the norm around the country. In New Orleans we have been trying to get them to fix our roads and bridges for years, they have been trying since before Katrina. The roads are fucked up beyond belief it looks like a third world country.

@RobotronSage 2 года назад

l live in a Dutch city where you can report this sort of thing for days and it never gets fixed. So you're telling me that the bridge next to my house is actually on the verge of collapsing? And that wasn't just my imagination? So if you can feel the bridge moving, like a ''shake'' when nobody else is crossing the bridge, this is dangerous? What do i do when my city refuses to repair these things? Like there are street lights with no covers on the electrical / maintanence parts (they broke off) and kids tend to ''play'' with this. I told them it's dangerous, reported to the council, 3 years later there are still no repairs that have been made to the street lights.... What do i do? I actually resorted to duct taping the ''dangerous for kids to play with'' parts. Do i duct tape the bridge too? Or is this shit gonna end up caving in on someone?! Fuck i hate this country / city

@theunkownbanana1823 2 года назад

I'm in no way related to the Surfside condo collapse, but I'd still like to thank you for the tasteful way that you covered the event. I hope that the forensic investigation come out with some meaningful recommendations so that an event like this can be prevented in the future.

@0xEmmy 2 года назад

7:00 "exponential" is STEM major for "ticking time bomb, and there's no display.". The fact that this wasn't addressed the moment the engineer mentioned the nature of the problem, is negligent. Especially given that exponential processes have been all over the news lately, courtesy of a certain virus.

@michael931 2 года назад

The average person (sadly) does not know what exponential means. So the gravity of the problem may not have been understood. And it may not have been understood by anyone that the collapse of the pool deck could bring down the adjacent building structure.

@illaneecorona 2 года назад

Yeah, its almost like someone read 'exponential' and just flipped passed that page like no one needed to seriously sound the alarm of the owners. Has me on my city's gov page right now looking at the latest code violations, etc for my building. Lbvs. I know it's stated here that its rare and a building wouldnt get evacuated just by the damage seen, but then there's other engineers in these comments saying those photos and the text alone were enough to be taken extremely serious to them immediately.

@themushroominside6540 2 года назад

Humans tend to think linearly rather than exponentially which is why for a lot of us exponents are difficult to understand. I feel like The term when used in this setting should be addressed in a more alarming manner so something is done about it but knowing how fellow humans are that just isn't feesable.

@wolf2179 2 года назад

@@illaneecorona You could attribute that to the local government as they have departments whose sole job is to ensure that if something was deemed serious like this, that they can force the owners to do something about it as well as condemn that section of area as well as force an integrity inspection in regards to the building for safety purposes. The fact that the local government did not do anything means whoever did the inspection which would have been a county inspector certified person, didn't forward their concern at all to the Health Department or Building violation department, or if they did didn't ensure their concern for safety or the seriousness of the damage wasn't pointed out clearly.

@tw629108 2 года назад

You literally learn about exponents in high school algebra get over yourselves lol

@YellowFox101 2 года назад

Will you do a follow up to this when the final report is released? I'd really like to hear your thoughts and explanations for those of us who don't understand building science as well as some other people.

@otiswilson4713 2 года назад

Where did you people learn soak in to concrete. You need to go out on a job with a 90 lb jack hammer and find some water in a slab with 6 thousand lb mix .

@Isometrix116 2 года назад

While it’ll probably be a few years before any final report is released, the channel Jeffostroff is covering everything as it comes out. So if Brady doesn’t cover it, you can find it there

@geoffreygriffin3015 2 года назад

@@otiswilson4713 if you think concrete is fully water proof without an admix, coating, membrane or something similar...we are all glad you are on the jackhammer and not doing anything structural

@JohnnyAngel8 2 года назад

@@otiswilson4713 Think about what you just said. Now read this: When concrete fails and the exposed rebar is ALREADY rusted, the cause has to be water that has soaked into the concrete.

@kindlin 2 года назад

As an actual structural engineer, reading that report in any seriousness would likely be quite daunting. The technical summary will be very interesting, but these reports can reach the thousands of pages. I wouldn't at all mind getting an executive summary with photos and visual aids later when the report is out.

@mrcherp9725 2 года назад

I am so glad he covered this. I don't care about the news covering it. I want to hear about it from a professional engineer. This guy does a much better job explaining things.

@BillionairesArentYourFriends 2 года назад

Definitely the best option. Especially someone who also isn't doing it for views and genuinely wants to explain what happened instead of just that it did

@lesflynn4455 2 года назад

Thanks Grady. This was an event that really surprised us here even all the way over in Canberra, Australia. It's such a rare occurrence in a modern economy using best practice construction methods.

@azoutlaw7 2 года назад

That was very kind of you to have the "In Memory Of" at the beginning. You always explain things where lay people can understand the levels of technicality. Great video. God bless all those people & the search crews.

@HistoryNerd66 2 года назад

It’s going to be interesting how the ownership model is going to impact how liability is determined. Since the building was collectively owned by the residents, with a board, will be curious how the decision making process is handled in how inspections are processed.

@DAzZuLK 2 года назад

Totally agree with you. In the country where I live, this ownership model is the most common. When new, buildings are taken care in good shape until the last department is sold. Then, is a mess between residents. My family and I owned one. It was a pain in the ass when fixing small problems were needed. Glady we managed to sell it.

@moosiemoose1337 2 года назад

There could be a manager or chief engineer who are hired to make the calls though. If you own your car and the breaks fail due manufacture fault and you hurt somebody, the fault is with the manufacture

@Swagtildawn 2 года назад

I agree. Aside from the initial shock and sadness, the first thing I thought about when it happened is how this is going to affect the legal side of ownership and culpability. Especially given that, like you said, the building was ran by a board which also lived at the complex. I'd be curious if you can logically assign blame to any one entity without great proof.

@Dwightstjohn-fo8ki 2 года назад

@@Swagtildawn I'm dealing right now with a Board of mostly retired Engineers that are on their game. However, an Eng. upgrade did get oversite on modifications to the wood decks. the same Eng. firm hired an "underground economy" couple of guys (one lives NEXT DOOR to me!!) and they weren't anywhere near to Code. The Eng. firm (in a diff. city) failed to ever come out to view the work, OR collect "job progress" photos (a no brainer in todays' cell phone world) and we're having to remove BEAMS, double them up, and od all kinds of things to catch the failure only three years ago. The entire bldg. is only twenty years old, and fortunately most owners are flush with "kash" and interested in maintaining the VALUE of their investment.

@Simon-nw9bf 2 года назад

Huh? This is entirely on the builder. Condominiums are hardly a novel concept and are the predominant housing type in most large cities. The Board has a responsibility for maintenance, and that's what the maintenance fees any condo owner knows and detests are for (yes yes I know everybody loves paying $800 a month on top of their mortgage and property taxes and utility bill to have the dog piss stains cleaned out of the hallway carpets but sometimes that money isn't totally wasted), but the poor drainage on the parking garage roof here and the insufficient rebar in the support columns by all appearances point to corners being cut in the building's construction

@massimookissed1023 2 года назад

I've seen Killsheimer saying they just weren't finding in the rubble the amount of rebar that was specified in the buildings designs.

@windsofmarchjourneyperrytr2823 2 года назад

It gets worse. See Building Integrity "Designed to Fail."

@raccoontrashpanda1467 2 года назад

If thats true they should have evacuated the North building right away until they could confirm it was built properly. If there is rebar missing there's still an entire building's worth of people potentially at risk of another collapse just as bad.

@massimookissed1023 2 года назад

@@raccoontrashpanda1467 Kilsheimer did take concrete sample cores from Champlain North, even from the floors of residents' appts, using ground-penetrating radar to avoid cutting through any rebar there. The north tower seems to have had better maintenance than the south, but I guess concrete samples and GPR to locate rebar are just parts of a more thorough appraisal of Champlain North.

@TommyShlong 2 года назад

Yeah, it seems the contractor and/or subcontractors didn't use the amount of steel the engineers specified. That combined with the failure of the pool deck and who knows what else all came together to cause this horrific tragedy. That's almost always the case in catastrophic failures. Eg: Shuttle explosions, jetliner crashes, nuclear power plant disasters...

@alainarchambault2331 2 года назад

In any event, the property value of the North Building just went through the floor I bet.

@FWtravels 2 года назад

I love that this video is NOT sponsored! Thanks for being awesome Grady!!

@donquijote6030 2 года назад

This has been the best and most informative breakdown of the tragedy that I have found. Thank you for taking the time to put this video together!

@chrismorris1304 2 года назад

I don't know anyone directly related to the awful accident, but what a hugely respectful gesture at the beginning. I paused this for a long time to look through all their names and I just wanted to say thank you.

@kevinheard8364 2 года назад

Like I have said before, this is simply "first class"; and "the world needs more of just the kind of quality and conversational content that you create". Well done, sir.

@bc-guy852 2 года назад

You're a class act Grady! The new studio is looking and sounding great (and I'm glad you found your iron!)

@dazinkeys 2 года назад

I am from Florida , I also worked in the construction industry. One thing I came across was the use of salt water to mix the concrete. It happened a lot in the 70s and 80s. It was a low cost and dangerous process. The company a worked for repaired many structures that had been damaged by this. We warned the owners of possible failure due to this. I truly hope that the collapse of this building was not due to this horrible practice.

@jayDB5 2 года назад

Grady, you really have a gift for covering this kind of topic. I'd firmly contend that your playlist of these videos is among the best of everything available on RU-vid. Thank you for nurturing, using, and sharing this gift you have. It is very much appreciated.

@lakedudesvideos 2 года назад

Agreed! Grady's videos are among the best I've seen. Thanks Grady!

@dan725 2 года назад

This is by far the best video on this subject. It was very respectful, sobering, and educational. This is better than the news itself. Just yet another quality content from Grady. Thank you so so much for taking the time and effort to make this video, and sharing it with us. I truly appreciate it.

@0xsergy 2 года назад

AvE usually covers these topics in concise way. his vid may be late/never due to BC fires

@Elirum 2 года назад

Thank you so much for covering this so thoroughly and clearly. As someone who’s lived in Miami all my life and actually would go to surfside pretty often, I know that most families would appreciate the detailed explanation of the process, the immense information and every other detailed you’ve studied. It’s not unusual for people to cut corners in construction in Miami, as everyone is pretty much always trying to get the cheapest deal possible while seeking to make the most money, even if only in short term lengths. Such are the pitfalls of a rapidly expanding city with so many foreign nationals (whose nations all have very different standards or practices). Thank you so much for this video.

@sufficientphrase7769 2 года назад

Thank you for covering this. I don't know anyone involved but I followed this incident feverishly for weeks, digging up videos and history and piecing it together. It was so tragic.

@whatsguccivespucci4379 2 года назад

Being in Miami, everyone is skeptical of the structural integrity of other buildings made around the same time period

@TheCapn23 2 года назад

I know I'd be worried.

@ianmacfarlane1241 2 года назад

@@donkey7921 Surely that's being monitored or has even been evacuated..no?

@franciscomoutinho1 2 года назад

Wasn't that building from around the time of Miami's cocaine days? Could it be somehow related?

@ianmacfarlane1241 2 года назад

@@collection6062 If you don't like it no-one is forcing you to hang around. Feel free to cut things short.

@TheDeadfast 2 года назад

As cruel as it sounds, they will probably be the safest buildings around as a result of this tragedy.

@MurcuryEntertainment 2 года назад

Incidents like this are some of the reasons why I'm beginning a masters in building science/forensic engineering in september.

@JesseG085 2 года назад

Good luck!

@maximus9644 2 года назад

Lol

@MiGujack3 2 года назад

The main reason being the money, of course.

@_armoredglasscannon2520 2 года назад

Good luck out there.

@pendlera2959 2 года назад

@MiGujack3 Everyone's got to make a living. Better to do it by helping people.

@AlbarionRed007 2 года назад

I wish more RU-vid videos were this classy and respectful. This is rapidly becoming one of my favourite channels.

@ChurchOfTheHolyMho 2 года назад

Shoutout to Building Integrity and his "Engineering Failures Found In Champlain Towers South Drawings" video. As you mentioned, he questioned rebar delamination and punching shear in previous videos - and once he ran the calculations on the architectural drawings, he discovered lots of interesting things (pool deck was at 100% static load as designed, etc.). Worth a watch.

@paulpipitone8357 2 года назад

All condo boards need to have a non resident professional engineer to help them make proper maintenance decisions. To many cases of kicking items down the road due to budgets or unknown ramifications of delaying maintenance. And once it becomes a major issue the cost delays the repairs even more. I do not blame the board it’s a problem nation wide. National rules need to be implemented on who sits on these boards and reporting up to municipal code enforcement to help prevent delays

@aritakalo8011 2 года назад

All large buildings should have external oversight, regardless of exact owner arrangement. Be it single owner, large property company owning, condo or some other form, there is always the possibility of penny pinching happening. Unless outside oversight goes to them and taps them to shoulder and says "you will fix that, *now* ". Since when it is large building, it is never an "internal issue". collapse like that puts the public nearby in danger. There can be visitors in the building, who should have expectation of the building to be safe to visit and so on. It was work in here in part via the 40 year inspection, but there should not only be 40 year inspection. There should be external enforcement of critical findings of such inspections. "your 40 year inspection says your pool deck needs fixing or your pool deck might collapse. You will start process of fixing it within 12 months or we will take you to court and have court order you do it. After that failure to do so is contempt of court and comes with punitive fines. You will be losing money on this. You can choose: do you lose money to the fix _or_ to the fix *and the fines* . Cheaper to just start fixing it." Since that pool deck collapsing alone would be serious enough issue to warrant immediate fixing, even without the whole building collapsing. What if someone is walking on the pool deck, when it collapses? Someone in a car in the garage, when the roof collapses on top of them and their car?

@stevengordon3271 2 года назад

I am sure they hired lawyers, accountants and other professionals as needed, so a consulting engineer should not be too much of an extravagance for high rise condos.

@BigHenFor 2 года назад

@@stevengordon3271 Unfortunately, that wasn't the case at CTS. They were so broke that their reserves only funded 4% of the overall cost of the 40 year recertification work budget. And the reasons are more down to economics than anything else. You have to remember that a large number of condo owners are retirees on fixed incomes. And, the process of buying a unit includes an inspection of the unit, but not of the condition of the building in which it exists. So, anyone not familiar with the difficult history of construction in Florida is buying blind. AFAIK, prospective "retail" purchasers rarely do searches to check the history of repairs done on condominiums. So, they might spend a lot just buying the unit, and will not envisage, or plan for a special assessment worth the best part of $100k. Sadly, the reality is that buildings of that age need regular money spent on them, and owner's budgrts are getting tight. What you'll will find is that many residents who can't afford to meet the ongoing costs will have to sell their units, and it might be only real estate investors who will be able or willing to buy them, probably at a hefty discount. They'll be able to meet the costs. That's what's happening everywhere.

@mgjk 2 года назад

Would it have made a difference here? there was an engineering inspection and a detailed report. Although it described major repairs required and was in strong language, it didn't go as far as to be able to mandate them. I don't think they knew how bad it was. I don't think having engineers on the board would have helped discover the dangerous condition of the building. What should be done about Champlain Tower North? Was it built by the same construction teams? Same engineers? Does it suffer from a similar financial problem?

@stevengordon3271 2 года назад

@@mgjk That report was only about the pool deck and car park, not the building itself. While the pool deck failure was likely the trigger, the limited scope of that inspection could not have discovered the additional deficiencies that would lead to the building collapsing.

@aaronpaul5990 2 года назад

Is the north tower being inspected closely as well? After all it is a copy of the south tower and may give indications on what may have caused the collapse even if the risk itself is not necessarily there since in all likelihood it has aged different.

@ilovefunnyamv2nd 2 года назад

Good question, my early understanding standing is the maintanance was ignored / delayed at the south building, tied up in group politics, but it was never stated this WAS performed on the sister building. Either way, this is a clear sign they need to do reinspections, and possibly reinforce / reconstruct some segments

@EngNerdGMN 2 года назад

I would guarantee they are looking at the north tower, how close the design was to the south tower, any differences between the two, and any other information they can glean off of it. Having a sister tower is extremely useful for forensic investigation.

@TheEgg185 2 года назад

The North tower just collapsed today. 😞

@DinPlayzRBLX 2 года назад

@@TheEgg185 source

@miranda.cooper 2 года назад

@@TheEgg185 Link? I'm not finding it for some reason

@gabrielrogers2971 2 года назад

Thank you so much for doing a video on this ! You’re more pragmatic than others in reports on this collapse! Keep it up! Thank you

@yusukeshinyama7094 2 года назад

It was such a tragic lesson. But it's also important that we shouldn't lose the public trust on modern engineering and safety standards. In this respect you did a terrific job in informing/educating us. Thank you.

@paulbeaudet8461 2 года назад

The mention of the neighbouring new building construction made me remember what happened to my parents' first house: The development was on a hillside with heavy clay soil. Everything was fine in the area for 12 years or so. After that, at the bottom of mountain a series of large apartment building were built. They discovered a lot of water in the soil and determined it would need to be managed for the stability of the foundations. The site was excavated and a drainage setup was put in place. All was good. A few years later, in my parents' neighbourhood, several of the houses began shifting. The first suspected culprit was pyrite (big problem at the time in the area), but none of the gravel tested high enough for it to be the cause. After more research, it was determined that the drainage system put in for the apartments was so effective that it actually partially drained the clay on the mountainside leading to the shifting. In the case of my parents' house, it was 4 inches in 22 feet. Apparently the kids who were in the house at the time would gravity race hotwheels on the floor! The fix was to support the foundations of the houses up on the mountain with piles down to the rock about 30-40 ft down. Definitely something I'm sure the investigators are going to look into.

@Johnny.Fedora 2 года назад

Nice story, but it clearly has nothing to do with the Surfside condo collapse. If your point is that often it's difficult to figure out why a building is failing or has failed, and requires investigation, then I completely agree.

@-Keith- 2 года назад

If that happened to a house I was living in, the fix wouldn't be to drive piles. It would be to get the f*** out of dodge. Last thing you need is a sinkhole at the bottom of the mountain to cave in on itself, causing the entire hillside to go for a journey. Piles won't stop that house from being carried away.

@PyroDesu 2 года назад

@@Johnny.Fedora I believe the point was that nearby construction can alter the underlying geologic support of a structure (which can cause failures in all kinds of places if things shift unevenly) - which *might* be involved, though I think it unlikely.

@Johnny.Fedora 2 года назад

@@PyroDesu, get back to us on that when there is evidence for such a thing. Meanwhile, after all the debris were removed, the basement/garage/foundation slab looked pretty intact.

@paulbeaudet8461 2 года назад

@@-Keith- they've held for 30 years now. Plus the piles go down into the bedrock. And it's not a steep or high mountain by any measure. And most of the houses are on a plateau. The area is not prone to sinkholes at all, unlike Florida.

@killman369547 2 года назад

I follow a channel called "Building Integrity" and the guy who runs it is a structural engineer and he's doing analysis videos of the collapse, they're worth a watch.

@geonerd 2 года назад

VERY much worth a watch!!!

@WooferCooker 2 года назад

Been watching him since the collapse. He’s full of knowledge

@kencarp57 2 года назад

Check his latest, 48-minute-long video about his analysis of the plan changes in 1980 that REMOVED several of the beams and reduced the size of the parking deck columns… before construction even started. As Josh named the video, CTS was “Designed to Fail”.

@markstarrett2740 2 года назад

Probably one of the better channels due to his non biased educational approach..same here though... people like these really help make RU-vid a place to learn.

@windsofmarchjourneyperrytr2823 2 года назад

@@kencarp57 Yeah, I was nervous there didn't seem to be ANY I beams in the wreckage. No bueno.

@PeptoBismolSixtyNine 2 года назад

Thank you for doing a video on this. Love your channel and born and raised in South Florida so I was pleased that you did this.

@tylerfolkert5467 2 года назад

Well done video. High quality as always! Very meaningful to put “in memory of” in the header. You are a person of true character!

@ruben3305 2 года назад

I love your vids. Always been curious throughout my life about how everything works, especially engineering. That’s for sharing your knowledge with us, free of charge.

@tncorgi92 2 года назад

There's a saying: "Regulations are written in blood."

@InfernosReaper 2 года назад

Sometimes, it's sadly true.

@caiosouza2943 2 года назад

That's especially true for aviation. It's crazy to notice how most os the regulations and protocols evolve after each major accident

@scottydu81 2 года назад

The push bar door latch was designed by a guy who, as a child, survived a disastrous human stampede caused by a blocked door

@pietropecora1335 2 года назад

Never in my life would I imagine a video of yours hit so close to home. I live on Miami Beach in a similar building to Champlain Towers (my building is actually 51 yrs old) and had friends who perished in Surfside. Thanks for creating this video as now I’ll be able to attend my building association board meetings more informed, to look for warning signs around my building, and to read our engineering reports more critically.

@tedfisk1211 2 года назад

The information you shared about the collapse and all the efforts to determine the cause are appreciated. I learn a lot from your videos. Thanks for doing them.

@IveGotAHondaFifty 2 года назад

I appriciate the reaserch that went into this. You didnt rush out a video as fast as you could.

@pvic6959 2 года назад

he is quality over quantity and we love him for it. we know for a fact that anything he puts out will be of high quality

@boRegah 2 года назад

This is one of the top ten best channels in all of RU-vid to me. The videos are just so incredibly interesting and well-made.

@S0ulinth3machin3 2 года назад

Grady is a born educator. One of the reasons RU-vid is so awesome is it gives anyone access to people like Grady. You’d have to interview 1000 civil engineers before finding another communicator at this level.

@Jason-vn5xj 2 года назад

Beautiful work. Well done. You were measured and compassionate, began and ended with the acknowledgement of the people lost, but still covered the engineering aspects in detail as they're known right now.

@miguelagawin 2 года назад

Thank you for sharing your insight on this important story, and your respectful coverage. Thank you.

@marcberm 2 года назад

I'd been waiting for your take on this. Excellent focus on the facts while still recognizing the gravity and showing respect to the victims. Well done.

@christinacody5845 2 года назад

Same! As soon as I saw/heard what happened to the Tower I was interested in his take but fully expected to wait a while to get.

@josiahsalters 2 года назад

Mannnnn I was really hoping you would do this video for a long time! Super excited

@whyyoulidl 2 года назад

Thanks Grady for an interesting summary of what's known so far; you managed a technically balanced approach coupled with measured solemnity. Hoping all involved in resolving this tragedy help those affected obtain some kind of solace.

@makeitwork583 2 года назад

I am so hooked on your channel! You speak so articulately, and clearly. Your content is interesting and well presented. I’m so happy this channel exists! Be well.

@dkphillips1654 2 года назад

Was going to say much the same but you articulated it so well, no need. Thanks!

2 года назад

And he doesn't drag on and on like some of the others.

@makeitwork583 2 года назад

@ There are no others, lol.

2 года назад

@@makeitwork583 The others do 45 minute videos and drone on.

@frixto 2 года назад

I have to applause you for taking the time to remember the victims in such a respectful way

@patrickmccormack3209 2 года назад

Hi Grady! You will probably never see this comment, but just in case you do, I want to express gratitude and admiration for what you do. In depth explorations on complex and sometimes controversial topics; they are professional, enlightening, and well-thought-out. It has been amazing to have been a relatively early subscriber to your work, to see this channel grow over time, and every time I see one of your videos I marvel at the quality of this free content. I think that reasonable, comprehensive, diligent, and meticulous examinations like this are so rare. Everyone seems to want to be the first to spit out their take or pump out the highest number of videos. The fact that you allow neither of those factors to influence your work is so critical to the quality of what you produce. Again, thank you. Keep making them we'll keep watching.

@Diego17511 2 года назад

I was waiting for your video on this! I can appreciate how delecate the matter is

@gmcjetpilot 2 года назад

You make me proud as an engineer by your excellent reporting, does not get better than what you have done on this tragic event. Thank you.

@paddyl888 2 года назад

very impressed with your sentimental and respectful coverage as well as your measured approach to the investigations and cause of this disaster. very hard to remain equally objective and respectful in these situations but you have managed it very well. well done

@ilovetotri23 2 года назад

Excellent video! Educational on a level I could truly appreciate. Thanks Grady! Peace in the hearts of all impacted by this event!

@lenders1164 2 года назад

Thanks for not monetizing this video Grady. Super-informative as always.

@JohnFourtyTwo 2 года назад

I worked for a company in Tampa, Florida (SPERCO) that specialized in concrete rehabilitation of various water drainage systems by applying a 2-part polymer coating to new construction and already constructed water supply and drainage systems. It's a very simple process that could be applied to new building construction but not cost effective for older buildings due to the removal of of material needed to get to the concrete surface for application.

@holdfast2soundwords 2 года назад

Let's get the word out about ways to maintain structures! And we can evaluate them more easily with technology... ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yvZVpuIE1LY.html&ab_channel=Sensequake

@JBAutomotive794 2 года назад

I look at steel reenforced concrete structures all around me especially infrastructure pieces and notice bleeding rust cracks of corrosion all the time. I am starting to think that I have a reason to doubt some of it's integrity.

@Soken50 2 года назад

You might want to get your hands on the latest as built documents and get them examined by a civil engineer, just in case :x

@SteelheadTed 2 года назад

@@Soken50 structural engineer

@BMXRACER1100 2 года назад

Sometimes the rust stains you’re seeing on the surface are corroded tie wires or iron pyrites

@Soken50 2 года назад

@@SteelheadTed If you want to be pedanticaly specific sure, they're still civil engineers though.

@NoMoreBreathe 2 года назад

@@Soken50 they are not. They likely have the same degree, but Civil engineers do not specialize in vertical structures like a building. It's two different industries.

@kimathomenow1 2 года назад

Nicely done. I appreciate the video beginning with the names of those that perished. You have a good voice to listen to, you're not overdramatic and your facts and comments were clear and understandable. Thank you and may the victims RIP and the survivors seek the help they'll need to move forward. God bless them.

@Christian-Rankin 2 года назад

Thank you for informing me on this event, I have come to avoid conventional news and usually only see headlines. Always helpful when an independent source you already follow provides all the info you need in one clear and noncontradictory take. Thanks again.

@mjmcomputers 2 года назад

Very well done and explained. Building Integrity’s latest video is a very good analysis on the design of this building and revisions that could have played a major cause in the collapse.

@geonerd 2 года назад

An excellent channel!

@ke6gwf 2 года назад

I was (am) going to recommend that channel as well, it's the most in depth and accurate coverage I have seen

@michaelimbesi2314 2 года назад

I also recommend Building Integrity

@givennorton 2 года назад

If you are an engineer nerd and want all the nerd stuff you can get check out Building Integrity.

@Jehty_ 2 года назад

I just want to say thank you for the video title. So many other channels would have said "What happened" Really nice to see someone who doesn't claim to know the answer in the video title

@klinetalladen 2 года назад

This is my gateway into this youtube channel, and i'm already liking what i'm seeing.

@Ntnher 2 года назад

I've been waiting for a pro like you to do this engineering explanation. Thank you!

@Studio23Media 2 года назад

I've watched all of the Building Integrity videos about this collapse and Josh did an incredible job breaking down all the details and technical terms in a way everyone can understand. This is also a great summary, Grady.

@hoperules8874 2 года назад

I just really appreciate that you state, even in your title; "what we know so far." So few have the integrity to make that up front and clear!

@miltoncallan1471 2 года назад

As usual, you did an extremely thorough and easy to understand explanation of the situation. And it was sensitively done.

@VixxiaTwylin 2 года назад

I'm late to the pool of comments but I just want to say that I am EXTREMELY GRATEFUL for your skill in speaking/reading aloud. It will probably sound trite, but one of the major reasons that I don't watch documentary type videos on youtube is the poor speaking skills of the narrator. Your voice was well moderated without being monotone. The pace and structure of your explanation was succinct but not hurried. Your pronunciation and tone were clear and easy to understand and your energy was engaged without being dramatic. With more people being able to share audio and video content, I have come to realize just how much a truly skilled public speaker makes a difference in understanding and enjoying content. Thank you.

@benmcmahon2417 2 года назад

✔️Respectful memorial ✔️Unsponsored ✔️Grade A+ content Thank you for taking the time to do this, to do it right, and for all of the other content you share on a regular basis. I can't speak highly enough about your channel to anyone who will listen.

@zacharysimon2952 2 года назад

I think these are some of the most engaging educational videos on engineering that I have ever watched.

@arnepianocanada 2 года назад

You speak very well and - I agree - placed the In Memoriam page very respectfully at the start. Your understated but clear presentation allows the facts to speak for themselves, not over-dramatized or 'souped up' with turgid music. Thank you from 🇨🇦Canada.

@MsAdsdf 2 года назад

Although I studied Structural Eng. & hydraulics in school in my career I have worked on MEP projects, your channel always enlighten me. The memorial screen shoot was very thoughtful as well. 👏

@Myname-il9vd 2 года назад

Thank you for adding the in memory page at the start, I’m nowhere near where this happened but it still feels right to know who passed during a tragedy, so I can find my own way to wish them peace, wherever they may be now

@routinesource4003 2 года назад

Countenance, speech tone, and cadence matched this particular content perfectly. Great work as usual! Love this channel!

@hukumongdu 2 года назад

man i was waiting for your take on this.. thank you

@agustti 2 года назад

This is the first video that I see with memory of the victims, thank you, you have a big heart.

@kiri101 2 года назад

I'm glad you took the time to remember the known victims before continuing

@99869339616434 2 года назад

I believe these type of failures will give tough time to structural inspectors and contractors, as we (civil engineers) have seen the minor skips during construction stage which can cause serious failures later on. The two main causes of structural failures seen almost every where are poor water proofing/ water penetration and poor quality steel fixing.

@donnajohnson5800 2 года назад

Excellent video. Thank you for posting it.

@kenal833 2 года назад

You are by far the most respectful RU-vidr when speaking if those who've passed.

@blobjrghf 2 года назад

I can hear AVE in the distance. "Complacency Kills."

@Real28 2 года назад

I had not seen the footage of the building collapsing. That breaks my heart after seeing all of those names and especially the children.

@sophibeans 2 года назад

This is the first video I've seen from this channel but this video was handled with such class and care that I'm subscribing to your channel. Keep up the good work!

@christopping5876 2 года назад

Interesting, valuable and unbiased insight in to the devestating collapse of this building and as to how forensic investigations work. Thank you.

@Paintbait 2 года назад

I was specifically waiting for Grady to put something like this together. I knew it would eventually arrive and I'm glad it did. This video simultaneous acknowledges the tragedy, while maintaining a detachment from it that satisfies public curiosity while respecting those who did not survive (as well as those who survive them) by being entirely unsensational.

@slackrbot 2 года назад

Insightful and respectfully delivered. My condolences to those who lost friends, family, and loved ones in this tragedy.

@RivenGreivances 2 года назад

First video of yours that I’ve ever watched. I’m subbed now. Much respect. Thank you for what you do.

@Avboden 2 года назад

One thing you forget to mention in this is that with the sister building built at a very similar time they can look at the structure of that building to see what deficits there may be in a standing structure and then match the rubble and see if similar deficits exist as far as reinforcements, etc.

@user-fj4po1lt1i 2 года назад

It doesn't need to be explained. It's inferred

@EngNerdGMN 2 года назад

I'm sure the north building had been flooded with teams of engineers looking for issues and clues.

@-Keith- 2 года назад

Depends on the design drawings. Sister buildings from the same development can often have significant structural differences in their blueprints, since they don't always build everything to the identical layout. Even when they do use the identical design layout, new SSI's can come out that change some aspect of the structural/architectural design of the newer building.