👷 Check out my coverage of other engineering events: kzread.info/head/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: kzread.info/head/PLQw1wzpZL_lovGG_jMIDwfS_a9uaGrdh- 🚧 Mike Bell, whose animation was featured in this video, also has some excellent videos about the collapse. Watch them here: kzread.info/dron/tNduBGCcBzSS2IMRMbFFkQ.html

@AkariInsko

2 жыл бұрын

Ok

@StephenMortimer

2 жыл бұрын

UNTHINKABLE ?? poor choice of word

@foowashere

2 жыл бұрын

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

@gus473

2 жыл бұрын

👍🏼 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!

@Art_bor

2 жыл бұрын

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

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 жыл бұрын

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

@4951-----

2 жыл бұрын

Best thing to fall a sleep to ☺️

@KaldekBoch

2 жыл бұрын

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 жыл бұрын

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

@edwardschmitt5710

2 жыл бұрын

Because 1% of the population is intelligent.

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 жыл бұрын

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

@iciajay6891

2 жыл бұрын

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

@TheDoctor1225

2 жыл бұрын

@@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 жыл бұрын

@@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 жыл бұрын

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

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 жыл бұрын

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 жыл бұрын

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

@DoctorX17

2 жыл бұрын

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 жыл бұрын

As another engineering geologist, so do I appreciate that.

@perfectsplit5515

2 жыл бұрын

I had my engineering students watch part of this video.

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 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

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 жыл бұрын

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

@dambien

2 жыл бұрын

@@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?

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

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

@zzstoner

2 жыл бұрын

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 жыл бұрын

@@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.

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 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

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

@member5488

2 жыл бұрын

All that exposed rebar was horrifying.

@SFKelvin

2 жыл бұрын

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.

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 жыл бұрын

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

@codymachado

2 жыл бұрын

Fastest summer ever

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!

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 жыл бұрын

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 жыл бұрын

Yes.. Indeed.. ♥

@jonaskonrad

2 жыл бұрын

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

@iwontliveinfear

2 жыл бұрын

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 жыл бұрын

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.

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 жыл бұрын

Indeed

@Malik-dy3xk

2 жыл бұрын

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

@bobbypatton4903

2 жыл бұрын

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

@bixmcgoo5355

2 жыл бұрын

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

@taekwondotime

2 жыл бұрын

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.

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

@raven4k998

2 жыл бұрын

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

@perfectsplit5515

2 жыл бұрын

The technical issues are very complicated.

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 жыл бұрын

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 ай бұрын

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

Your videos tackle some deep subjects without sensationalism

@gus473

2 жыл бұрын

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

@Wyvernnnn

2 жыл бұрын

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 KZread, he would educate more people and have more budget that way ; plus, it wouldn't necessarily be a douche move either.

@letsburn00

2 жыл бұрын

KZread 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 жыл бұрын

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 жыл бұрын

Agreed

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 жыл бұрын

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 жыл бұрын

This must be heartbreaking for you :(

@kencarp57

2 жыл бұрын

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

@justsomeoneonline437

2 жыл бұрын

I’m sorry for your loss.

@ethandewicki576

2 жыл бұрын

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 🙏 😔

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 жыл бұрын

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.

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 жыл бұрын

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

@wakerobin9215

2 жыл бұрын

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

@perfectsplit5515

2 жыл бұрын

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

@mniles

2 жыл бұрын

@@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 жыл бұрын

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

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

​@@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 жыл бұрын

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.

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 жыл бұрын

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 жыл бұрын

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

@kriegscommissarmccraw4205

2 жыл бұрын

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

@hellomistershifty

2 жыл бұрын

@@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 жыл бұрын

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

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.

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.

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 жыл бұрын

Wow that's pretty awesome! Good job!

@Lilliz91

2 жыл бұрын

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

@suntzu6122

2 жыл бұрын

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

@benmgoldberg

2 жыл бұрын

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 жыл бұрын

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

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 жыл бұрын

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

@raccoontrashpanda1467

2 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

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 жыл бұрын

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

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

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

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

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

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

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 жыл бұрын

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

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.

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!

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

@TheCapn23

2 жыл бұрын

I know I'd be worried.

@ianmacfarlane1241

2 жыл бұрын

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

@franciscomoutinho1

2 жыл бұрын

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

@ianmacfarlane1241

2 жыл бұрын

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

@TheDeadfast

2 жыл бұрын

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

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.

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.

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

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

@JesseG085

2 жыл бұрын

Good luck!

@maximus9644

2 жыл бұрын

Lol

@MiGujack3

2 жыл бұрын

The main reason being the money, of course.

@_armoredglasscannon2520

2 жыл бұрын

Good luck out there.

@pendlera2959

2 жыл бұрын

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

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.

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.

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.

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 жыл бұрын

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

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 KZread. Thank you for nurturing, using, and sharing this gift you have. It is very much appreciated.

@lakedudesvideos

2 жыл бұрын

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

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

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.

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

@@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 жыл бұрын

@@-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.

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

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 жыл бұрын

@@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.

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.

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

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

@InfernosReaper

2 жыл бұрын

Sometimes, it's sadly true.

@caiosouza2943

2 жыл бұрын

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 жыл бұрын

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

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 жыл бұрын

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 жыл бұрын

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 жыл бұрын

The North tower just collapsed today. 😞

@DinPlayzRBLX

2 жыл бұрын

@@TheEgg185 source

@miranda.cooper

2 жыл бұрын

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

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

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.

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 жыл бұрын

VERY much worth a watch!!!

@WooferCooker

2 жыл бұрын

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

@kencarp57

2 жыл бұрын

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 жыл бұрын

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

@windsofmarchjourneyperrytr2823

2 жыл бұрын

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

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 жыл бұрын

Let's get the word out about ways to maintain structures! And we can evaluate them more easily with technology... kzread.info/dash/bejne/q6qOuNKueaiXfLw.html&ab_channel=Sensequake

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

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.

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.

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

@S0ulinth3machin3

2 жыл бұрын

Grady is a born educator. One of the reasons KZread 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.

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

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

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

@pvic6959

2 жыл бұрын

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

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 жыл бұрын

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

2 жыл бұрын

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

@makeitwork583

2 жыл бұрын

@ There are no others, lol.

2 жыл бұрын

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

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.

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.

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

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

I have been waiting for you to upload your analysis on this and apparently you did it 2 weeks ago!? Your channel is amazing!

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!

✔️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.

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.

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

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.

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 жыл бұрын

An excellent channel!

@ke6gwf

2 жыл бұрын

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

@michaelimbesi2314

2 жыл бұрын

I also recommend Building Integrity

@givennorton

2 жыл бұрын

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

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 жыл бұрын

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.

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.

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.

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.

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

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

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

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 жыл бұрын

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 жыл бұрын

@@Soken50 structural engineer

@BMXRACER1100

2 жыл бұрын

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

@Soken50

2 жыл бұрын

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

@NoMoreBreathe

2 жыл бұрын

@@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.

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

This is the most informative and well explained video I have ever seen on KZread

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!

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

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

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. 👏

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

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

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

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

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 жыл бұрын

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

@EngNerdGMN

2 жыл бұрын

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

@-Keith-

2 жыл бұрын

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.

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.

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.

Really appreciate the "in momory of" screen and no sponsorship in the end. Shows that you really care. Just made yourself one of my favorite and respected youtubers of all time.

11:03 There are at least 2 high defintion 3D laser scanners sitting on that Balcony. The models they could make from that, if they scanned continuously during the clean up and could make a layered map of the site, those could be really really interesting.

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

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

thank you for taking the time to dispassionately explain all of the possible conditions that may have contributed to this disaster. And for giving the 97 known victims a name.

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

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

This story stuck with me to the point where I dreamed I died in a building collapse it felt so surreal, the feeling of being crushed and suffocated immediately woke me up out my sleep, I guess I was given that dream to see what it felt like... I can only imagine what the people went through that actually lived this. Rest peacefully to everyone that lost their life.

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