What Secrets will be Uncovered at Champlain Towers South Collapse Site? We look at its Foundation.

[@carolynlinkfield4175]

Fascinating. I’m a 77 year old woman and your concise explanation allowed me to understand what MAY have happened. I understand it was also more than one cause of failure. I found your channel right after the collapse when you were on vacation and trying to find a quiet corner to record. THANK YOU!! You will always be one of my favorite Channels.

[@BuildingIntegrity]

Thank you! That means a lot!

[@crankychris2]

@@BuildingIntegrity I hope you do some video on the FIU bridge collapse soon.

[@minipawpaw]

I would have learned a lot more in science classes if I'd had teachers like you! Your systematic way of laying a factual foundation and then building off of it with clarity and logical sequencing is awe-inspiring. You are one phenomenal teacher!

[@windsofmarchjourneyperrytr2823]

There's free tutoring and even free college if you're broke and apply for grants. :)

[@KameraShy]

I was thinking the same thing, recalling my previous science "teachers."

[@nodnoc]

When a professional is able to explain things to this degree of detail all the while making it possible for the average person to understand then you know they are a master of their craft.

[@nilnil7325]

"If you can't explain it simply, you don't understand it well enough." (the quote is usually attributed to Einstein).

[@lesleylesley5821]

It really is incredible. I look forward to these videos and set a good time to watch them.

[@G2DwarfStar]

The only source I listen to.

[@leonardbreau8928]

You're right, but many technical professionals who can communicate well become managers.

[@bettyherzing4333]

Oppppp⁰

[@gogett7867]

With over thirty years as a construction industry professional; this is music to my ears, nourishment for my soul, it feels good to know that the future of the industry is in good hands as a result, of the simple, straightforward, erudite manner in which Josh has dealt with difficult subject matter and communicated same to non industry professionals, concise, pellucid, and as such, I for one am thankful for this, Josh is a credit to the industry and his generation of industry professionals. Job wel done, very well done indeed!

[@Graham_Wideman]

4:21 Josh's clarification of the term "pool" as meaning "pool area" is a fine example of the level of careful thought the he puts into these videos. Well done!

[@KameraShy]

It is also a perfect example of terminology being thrown out by the media that turns out to be so misleading it is erroneous.

[@mikalin9286]

@@KameraShy 100% usually I hear some sound bite on the news and then I have questions about a specific phrasing and it takes me HOURS to figure out what it might refer to. I wish the news would have a statement after certain clips like for more “free” information about terminology and specifics. I do like that some local stations have started streaming some stories and answering viewers questions live, definitely a move in the right direction.

[@skgilbert7]

I’m just a nurse who stumbled upon your channel after someone shared one of your earlier Champlain Towers videos. I’ve seen several now and I’m *stoked* whenever a new video appears. You do a fantastic job explaining things in a succinct and organized fashion. Your knowledge base is impressive. These videos truly demonstrate how excellent you must be at your job. Thank you!

[@zephyrhills5620]

Yes! Mr. Porter, you need to be teaching professionally (if you’re not already).

[@wyomingadventures]

@Nancy Hollo my friend lives there.

[@paulazemeckis7835]

Dont ever state "just a nurse". Nurses are invaluable!

[@AreeyaKKC]

Im a nurse too. Found these videos randomly living on the far side of the world. Been hooked since.

[@mary-vb7fm]

@@AreeyaKKC I am a nurse as well. He is good. I have learned so much from him. Interested stuff.

[@edzachary8657]

This is so easy to understand this guy is really good at getting his point across in a simplified sort of way

[@chrisbarr1359]

He would be a great professor.

[@terry94131]

@@chrisbarr1359 Thinking the same thing. His explanations are first rate and flow very logically.

[@piccalillipit9211]

I said on one of his previous vids that this guy spends a lot of his life explaining very complex things to people with no clue about them. I know cos I have understood every word of this series. Its a real skill.

[@GardenGuy1942]

He like Khan Academy

[@GrumpyKay]

@@chrisbarr1359 I had no real interest in this type of stuff, but he honestly got me interested.

[@MediaMaverick_]

You’re a wonderful teacher. Who knew engineering could be so fascinating for the lay person. I’m so sorry this tragic event precipitated your instructive videos, but I’m sure many have learned a great deal as a consequence.

[@JB91710]

When you focus on logic and common sense and not emotion and guesswork, it isn't hard.

[@laresistant]

Well said!

[@laurelldockall2399]

And let’s hope it may inspire more passionate folks to go into the industry. What a preview for the importance of always doing your best and to keep learning.

[@FrankHeuvelman]

Everyone but the builders themselves.

[@laresistant]

These could be 4 hours long and I would still be 100% attentive! Once again this is fascinating information presented in a thoughtful, logical way free of personal bias and that really speaks to your personal integrity and authority on these matters. Thanks for sharing your wisdom and making engineering so interesting! Agree with the comment about you being a professor!

[@DomesticatedGoth]

Yesterday I watched 4hrs of these back-to-back (I wasn't well and needed to fill my time with something stimulating). I'm an arch. tech. and this is fascinating to me as someone in architecture. Certainly, a lot of the terms mentioned are things I am familiar with, but I graduated in 2019, and this chap is far more engaging as an educator than most of my lectures. He's on topic, he's clear and concise, and he always has a reference for the things he says, and his supplementary visuals are clear and explain what he says, not confuse it.

[@jeffmaling9577]

As an engineer myself (but not civil)…I appreciate Jason’s style of teaching and explanation. Keep up the good work…your content is valued and appreciated!

[@zapfanzapfan]

It's like I'm taking a summer course in building engineering.

[@MegaSnow121]

I so agree. Sad that it took the collapse to give us this, though… I hope this channel will continue to grow and present more in depth lessons like this one.

[@cdubya3071]

Civil Engineering is the King of all Consulting Engineers. This is it.

[@kellyname5733]

@@MegaSnow121 Sadly there are many building collapse's all over the world, so he will have plenty of material to make videos.

[@williammcbrayer3277]

After watching all these videos, I'm heading to Home Depot tomorrow, and starting a new building this weekend.

[@monapargee9520]

Thanks for all you have taught us about "building integrity"! How many people will use this information to be wise and informed buyers or owners of multi level structures along costal areas? We cannot look past standing water, spalling, exposed, rusted rebar or similar defects in buildings in which we live or work. The totality of your videos on Champlain Towers South have been excellent.

[@GH-oi2jf]

It was built on a low island with saltwater nearby on two sides. Why would you want parking below grade? Answer: because there was a 12-story height limit but the parking garage didn’t count if it was below grade.

[@brnmcc01]

The beach was a few hundred feet away from the building on the east, and it was downhill to the beach. On the west side, the intracoastal waterway was a few blocks away.

[@BTW...]

The parking garage is not a habitable level, so doesn't count as a 'storey'. How many Developers over the years were voted into Local and State Govt.? TOO MANY! THIS is why exceedance on height/storey limits happen.

[@BTW...]

@James Mcguire storey /ˈstɔːri/ noun: storey; plural noun: storeys; noun: story; plural noun: stories a part of a building comprising all the rooms that are on the same level. "a three-storey building" Anything further to add, Dill?

[@RobMancusoJr]

@@BTW... wow, went my whole life not knowing that. Ya learn something new everyday! 😆

[@brinkee7674]

@Randy Carriere A boat? He had a yacht and a big one to boot....Just guessing

[@MJ-fy2no]

Thorough series explaining numerous issues with that building. You are an excellent teacher.

[@spitfirepam]

I am no engineer, but I find your videos informative and easy to understand. I have learned a lot, and the biggest thing I learned is that this is interesting stuff!!!

[@lonverstuyft670]

Another outstanding video that presents the information in an easy-to-understand manner. I never thought I would find building construction details so fascinating. You should be a college professor!

[@mariahmakinen6887]

I was thinking much the same.

[@terig4134]

Exactly the same sentiment.

[@bridgettroup7946]

I concur I'm fascinated with all of this

[@minnahumble2294]

Me too. Great presentation.

[@grantk2585]

I agree completely. I’ve seen a number of people talking about what happened here, but these videos have been by far the most informative and educational.

[@thomascrosby6105]

I was an iron worker in those days. you drive the piles, cut them off at a certain elevation lay in the rebar mat. set your dowels. pour it. set columns, form and pour. shoot an elevation, backfill to the mark, nail expansion around each col. and pour the slab usually with 6,6,10,10. what disturbs me is col no 72 still standing on part that did ot collapse, but the parking deck punched thru leaving a sparce amount of re-bar hanging out. print called for 16 no 5s each way. these look like a handful of no 4s, maybe started out as 5s but carbonation and chlorides maybe deteriorated their diameter over time should be checked to see if the plans were followed.

[@roddiener]

Those drop heads at columns looked pretty lame compared to what we do in So Cal, 416 retired.

[@cdubya3071]

@@roddiener agreed. Californian’s coastal buildings are engineered to survive constant seismic movements, as the Pacific Plate slowly slides to the north. Their ferro-concrete pilings aren’t catastrophically failing.

[@ireneswackyjournals8810]

Sheraton hotel here was built 1000x better than this building. You can see the ambit of rebar and the thickness used was much different to thus build. Had they done it using the same method that building would not have fallen down. Note Both were built in the beach here, just in different times

[@brianwest2775]

The garage floor survived intact. As a layman, I find that incredible, that so much fell on them and so much heavy equipment but the floor looks perfect. Can't tell the condition of the columns but clearly doesn't look like a foundation failure. kzbin.info/www/bejne/nqTQonWAn5KEZ7M

[@dereksmith1803]

Just want to say that I found one of your videos in my feed and decided to watch it as I was interested in what had happened with this building. I liked it enough that I decided to binge watch from the beginning (at the time, about 5-6 episodes). Your videos have been very good and easy for the average person to understand. Thank you for the time and effort you put into making these videos. I have learned a lot and find them very interesting and informative.

[@mtz2273]

Same here!

[@jennifermalone5226]

Same here and I have since sent my sister and her friend down this rabbit hole. It is very informative and interesting to watch these!

[@dr.killmoretreeratologist8848]

I just watched him for the first time doing this video. It was amazingly interesting, informative, and easy to understand. Now I'm about to follow y'all down that rabbit hole. 👍👍

[@afterburner119]

Josh, I am so glad I stumbled across your channel, in more than one way. This is the only channel I use for anything CTS collapse related and just wanted to take a moment to recognize your efforts. You report and analyze without bias or major speculation which amounts to “integrity”, which can’t be said about 99% of anything CTS related. For the family members and friends of victims that stop by here, the country stands with you and behind you and now we must ensure that your loss and your families loss is not in vain (that this never happens again).

[@paolabisoneaux4056]

You got it!!!!! I live 2 minutes from that building and I can confirm that the seawater is coming upward everywhere from the ground every time we have High tides.

[@dalewalker4614]

Wow! Do you have any pics of the water appearing in places other than the collapsed condominium?

[@brendaclements1016]

Which eventually washes away the ORIGINAL foundation, ergo building becomes unbalanced and collapses all due to Climate Change.

[@pamelasharp4766]

Time to move is what I say!!

[@americafirst3738]

@@brendaclements1016 the climate has always changed.... Due you think Obama and john Kerry (to name a few)would have seaside properties if they really believed the area would be under water in 5yrs???? The climate agenda is just like cv agenda

[@andrew30m]

@@americafirst3738 Amazing you know this and yet the entire planets scientific bodies, Royal Societies, National Institutes, disagree with you. Nothing is going to be underwater in 5 years the science doesn’t say that, there will be gradual changes building up over time.

[@electb]

Licensed Master Electrical Contractor and Inspector that has worked all over the world. I have very little to no structural knowledge but I find this video fascinating and very informative. Awesome work!!!

[@Lighthanger]

I would like to commend you on an excellent job of demonstrating what I have believed all along. I have spent over sixty years in construction and have seen many types of buildings go up. Though I am not a structural engineer, I have watched a lot of structures being built. Your are not only explaining what I believe is the most likely scenario regarding the collapse of the tower, you are teaching a lot of folks some engineering. Excellent job!

[@waitaminute2015]

Ditto

[@NazmusLabs]

Thanks for corroborating. May Allah (S.W.T.) bestow upon you His Blessings and Guidance.

[@sorensolveig599]

As a P.E. (Professional Engineer) from California, I agree that this series of analysis "from a distance" is right on target and is a great educational series. I feel the regular flooding of the basement is a key to this tragedy and the explanation given could likely be found to be the cause. There are a few other possible scenarios related to the flooding that could also be contributing factors.

[@Lighthanger]

@@sorensolveig599 Hydraulic pressure could have been an issue.

[@Admin-tm8gp]

My Educated guess! *Chlorine pool water 40 yrs of storms overflowing the pool water! *Waterproofing failure ! *DECK punch thru shows connection failure at pool deck columns! ( look at columns still standing) *Column connection *** *Column connection undersized rebar ? * Not Enough rebar @ column to deck!!!!!!!!!!!!! *Rebar single strand at bottom of deck !!!! More info needed

[@GFSwinger1693]

This is the only channel covering this particular incident where the guy talks strictly facts and/or theory. Non of this jumping to conclusions speculative BS that many of these other self proclaimed experts that are covering this colapse espouse.. Please keep up the good work.

[@elizabethowens8548]

Exactly. There's one fellow who was actually at the beginning gave a crew level down to earth coverage. He got carried away. Now he's posting in all ego locked caps. Too bad. This is the channel for intelligent summation

[@bobbyc2768]

@@elizabethowens8548 are you talking about the channel jeffostroff?

[@MegaSnow121]

@@elizabethowens8548 That might be the same dude I watched a couple of times. Too sensationally presented, and not well prepared like Josh here does.

[@elizabethowens8548]

@@bobbyc2768 no. I kind of want to hold off on outing him in hopes he self corrects because he was good at explaining that even a day laborer could understand. Sometimes we get too big for britches

[@bluejean500]

@@elizabethowens8548 i think i know who you’re talking about. he was great at first, but now he’s dissing everyone else covering this topic.

[@arshy45]

Your explanations are not only insightful but they are easy to understand and INTERESTING. My field is healthcare- I've never before found construction concepts so fascinating. Keep up the good work!

[@HeavenEarthFloral9]

Thank you for all your work on this horrible tragedy. There is a parking garage partially below ground level. A location on a barrier island with possibly reclaimed marsh land on the western side. Rising water table due to sea rise in the past 40 years. And a sinking building. What a recipe for disaster.

[@nancydeis7121]

The amount of time you have put into these videos really does show where your heart is. I literally wait on the edge of my seat for the next video. I am soaking up all the knowledge you are putting out and can't wait for more. You are a good man. You are not doing this for clicks or money off of youtube as others are. Anyone who hires you should know that they have a good honest knowledgable person who really cares about what you do. Thank you for doing these.

[@sophiahughes4665]

Last year's lesson was Learn Virology! This year's lesson... Learn Structural Engineering! Hard lessons.. good teacher here ^, thank you.

[@anniefranks6881]

I agree but too bad this gentleman wasn’t able to teach us the virology instead we suffered under ‘flip-flop Fauci’! 😉❤️

[@tjflorida2304]

Should be gain of function virology...bad docs....

[@yosefmacgruber1920]

You think that the fake "experts" want that? For we learned that our medical "experts" were more like educated idiots, but then maybe they lied on purpose having a very evil central banks' "Great Reset" agenda. How dare they deny that natural immunity and even herd immunity is a thing?

[@yosefmacgruber1920]

@@anniefranks6881 Some people call him "Faux-ci" or something similar. What a fake!

[@williamsstephens]

@@yosefmacgruber1920 - Nobody, literally no one, believes that natural immunity and herd immunity are unimportant concepts. You're just confused.

[@bakrub24]

You present a plethora of information in an understandable format. My father was a mechanical engineer, it was his belief that if any “expert” in any field is unable to explain complex issues and concepts in such a way that the average person can understand the explanation. If they are unable to communicate such information thusly, then they, themselves, do not have a solid grasp of the concepts they are trying to explain. You, sir, are showing this skill quite clearly. :-) thank you for presenting the information in such a format .

[@marykrueger6039]

This gentleman should have a zillion followers. I've learned a lot about structural engineering. He makes everything easy to understand and follow. Really great job. Thank you.

[@Jmanx07]

This guy needs to be construction teacher someday. The industry needs people like him who can convey this knowledge so smoothly.

[@Drwild75]

What do you think he is doing now?

[@IttyBittyKnittyJessa]

Wow I feel like if this guy was my teacher, I could learn anything 😂 .. but honestly I’ve been following this, thanks for making it understandable for folks like me!

[@FedoraSnatcher]

Its mostly cause you are actually interested and not being forced to learn

[@millster9389]

I feel the same way! I've learned so much from watching his show. He's great!

[@reallyme3573]

Yep, he's great at explaining, how a building is build. But let's take it one step further: If the building was rotten at the underground pillars, then it should have shown ample signs of deformation, which it didn't, and should have fallen over, not collapsed in it's own footprint, like we see at a controlled demolition.

[@Shadow_foxx1]

You deserve waaaaaaaay more subscribers

[@golfmaniac]

Your videos are great for the average person to understand large building construction. I am not an engineer, but have done home construction. When I heard that the garage has been flooding for years, I was amazed. My immediate thought was of all the damage that had to be doing to the foundation. It is hard to believe that the only response was to run pumps to remove the water. In my opinion, the building should have been condemned back then, if a permeant fix could be found in a reasonable amount of time. Their solution basically was to ignore it. This building was like a bomb sitting there waiting to explode. There are so many people at fault here, it would be hard to count them all.

[@oculardeception3862]

This is sounding like a failure cascade. My understanding of catastrophes is that its not usually one thing that goes wrong but a bunch of small things.

[@JonMartinYXD]

Yeah. If you ever watch the show Mayday (Canadian show, may have different names in other countries) where they explain air crashes, it is almost always the result of a chain of events. If any link in the chain hadn't happened (eg. mechanic hadn't used the wrong screw, pilot hadn't ignored a fault indicator), the crash wouldn't have happened. I can almost guarantee that when they put the whole picture of this collapse together there will have been multiple occasions where if someone had taken the right corrective action on one problem, the chain would have been broken and the whole disaster would have been avoided.

[@karenabrams8986]

Things like not letting big palm trees sit on your garage’s roof for a long long time?! Holy 💩 I don’t want to see big trees of any kind 50 ft near anything I live in now.

[@mango8918]

Another Master Class on structural engineering! I never thought that I would be so fascinated with such a technical subject that is so far afield of my background but, I literally can't wait for the next installment.

[@tammywhatever8602]

So informative!! I took 3 years of mechanical drawing & architectural drafting in CTE courses throughout high school, 3 hours everyday & LOVED it. But then had a baby a year later & couldn't afford the 9 years of draftsman school... you make me wanna go back to school at age 54 now!! I love this stuff... thank you for sharing your expertise and explaining it so well! Hugs, from Mesa, AZ 🌵

[@sycamore-wi2zs]

Water. I'm sure you noticed the water staining on the columns was not from standing water on the garage floor which leaves a flood line parallel to the floor, but rather clearly an irregular staining only possible from wicking the water up through the columns. Great videos.

[@andrewterrebonne7015]

As you and the OP stated that the garage floor water is most probably ground water intrusion, how would one propose to protect the underslab support structures against corrosion in area subject to high hydrostatic pressures? The vertical walls can easily be protected by using stub wall off slab with a keyed/waterstop joint and coated exterior, but how can you get underslab? Was the basement slab poured on "grade" or was it formed?

[@batcactus6046]

great point

[@bwtawny]

I think that the water in the garage was due to the broken waterpipes. But I do wonder how far do you dig in that area before you hit water? This is a barrier island so I would expect water table to be high anyway. When they dug the foundation did they not seal something properly? Uus that part of the reason there was always water in the garage?

[@laurasalo6160]

That is exactly what he said in the video. Are pointing out that you agree?

[@andrewterrebonne7015]

@@bwtawny In my area, you'll hit water at 2-3 ft below surface. Deep rooting trees don't survive. Root systems don't grow into the ground, they grow ON the ground. Katrina toppled more trees than snapped.

[@kimberlyperrotis8962]

I think the foundation was meant to be in the dry; a wet, especially salt-water contact, foundation would require a continuous de-watering system, among other engineering changes, and likely low-permeability (slurry) subsurface walls around the construction excavation. I doubt this building was designed to have its basement below the water table, especially in an area of known saltwater intrusion. If the water table had risen that high, adjacent building garages at the same elevation would be wet. I think a sinkhole developed under a column (or several) base, allowing salt-water intrusion into the foundation and basement. Once the karst cavity developed sufficiently, the columns failed dramatically at, sinking into the karst hole. The building, if otherwise in good condition, might have temporarily withstood one column failure, but I think the whole structure was underbuilt, the factors of safety seem low and the column dimension to the centering too low.

[@lionrocklr9217]

A recent video pointed out that the subsidence factor for this condo was pretty localized. Nearby properties not affected as much. I'm learning as I go here but I'll try to find the link to the subsidence map. But if this video and Perrotis comment pertain, the implications for barrier island condo construction up and down the coast is too immense to total up!!!

[@waitaminute2015]

There are other buildings in the area with flooding garages. They are at random locations.

[@gerardacronin334]

I would like to know why the columns in the collapsed section were narrower than in the section that did not collapse.

[@dannycrumley]

9 cut&

[@isabellecasier5702]

I am in EU and I constructed a house. Now not comparable but before we started we received instructions and one was 1m above waterlevel, so we had a crowling space underneeth the concrete slab for pipes and utilities but not usable as a garage or basement (other areas do allow basement and or garage). Noted we where in a region with high waterflooding possiblility. So the way we construct changes depending on soil and water presence. Thanks to your explanation I better understand the why and the mecanics of waterlevels and the connections and influence they have on a construction and buildings. It gives us knowledge how to and what to look at when we buy a condo, but also to keep looking during the years how a building is reacting to the changes occuring and how it shows even is the cause is invisible.

[@dodo7562]

I have been on chemo for the past two years and it sucks. Self isolation was the norm and then came Covid. Last week we had riots and we lost so many shopping malls that eventually I stopped counting. Now we have food and medicine shortages after all the lawlesness. Just when I thought that life will never get better, I discovered your channel. What a nice surprise. I am glued to the screen. Thank you Sir for sharing your knowledge with us. Loving every moment.

[@JoeDplummer_]

I wish I had a College professor like this guy during my Architect formation. Great video!!!

[@YTPartyTonight]

There are many layers to this onion.

[@KB4QAA]

YTP: It's a blooming onion, mate!

[@SourDonut99]

Nah theres only a few. Peel back the layers and you see its hallow inside. I think thats the problem lol

[@BexnRN]

I first read that as “many lawyers” 😳🤦🏻‍♀️

[@YTPartyTonight]

@@BexnRN I'm sure that's an entire other onion of it's own.

[@leighlitz2481]

When the NIST report does come out we’ll understand what it says thanks to your videos. Thank you.

[@sundaywhiterabbit7679]

NIST are pros at covering up controlled demolition so yeah not surprised here they are again.

@@sundaywhiterabbit7679 , the internet is full of lunatics, and you're a fine example of that. Or did you demolish the building? Did you, punk?

[@sundaywhiterabbit7679]

@ there are obvious detonation flashes. All sections of the building including the known demolition fell at free fall speed directly into their own footprints. Flashes before the initial collapse were the same time before the collapse. And just in case you don't know, it takes months to prepare a building for controlled demolition, not a day and a half nor even 10 days. That fact can be found in numerous places including Wikipedia. By the way, a natural falling building have 360 degrees around at which to fall. But all 3 sections fell directly down. The one and only way to accomplish what we saw originally was controlled demolition. Naturally falling structures also take longer than free fall speed. Pancaking floors, if that is even possible would take much longer than free fall speed. Every last floor truss would have to come off of every last column at the exact same time for the building to just drop at free fall speed. Don't be naive or stupid. The news lies. Rich people do horrible things. Rich people pay people off. And besides that, look carefully, there were no lights on in ANY of the condos, not in the "accidental" collapse or in the remaining condos on the other side as per the original video. Not one. Not one. So at 1:30 am EVERYONE was asleep with ALL the lights off? Really odd. Also look carefully at the remaining building before it's miracle time controlled demolition, ZERO patio furniture on any of the balconies. NONE! Not a lounge chair, table, chair, plant, bicycle, NADDA. All of this adds up to no one in the building. A planned controlled demolition and a lying main stream news media for views. Or a massive insurance fraud. Bet they build a 3 million dollar per condo unit next, because a poor 3/4 million dollar condo just ain't cutting it. It is beach front property. Follow that money and watch. Bet it's not gonna be a memorial site. Just like 9/11 ground zero...PUNK.

[@nobodyknows3180]

@@sundaywhiterabbit7679 show me a link to ANY video you've seen that shows detonation flashes, and we will do a frame-by-frame analysis.

[@sundaywhiterabbit7679]

@@nobodyknows3180 the ONLY one of the building collapsing. Detonation flashes going off all in the dark condos at precisely the same time before the collapse as the known controlled demolition. You find me a shred of evidence that a 12 story building can be prepared for controlled demolition in a day and a half or even 10 days. Not possible. It's crazy to believe that all 3 sections fell in 3 seconds which is exactly free fall speed strait down into the property. 3 sections because they are actually 3 seperate buildings, they have to have 2 hour firewalls between them at so many feet at per building code. Out of 360 degree direction they all 3 fell strait down, not over to the side at any angle. Free fall speed is only accomplished by separating every floor truss from every column at precisely the same time, otherwise the collapse would take longer than 3 seconds. I can find a video of a naturally collapsing 2 story grain silo that takes 6 seconds to come down. No trusses connected to columns just a shell of a silo takes twice as long to come down and not straight down. This all has every mark of controlled demolition. All other theories that avoid the topic are ridiculous cover ups for whatever purpose it was done for. Please for the love of God don't think wealthy people wouldn't lie, kill people or conspire to commit fraud or insurance fraud for some gain. However, I have very serious doubts anyone was even in the buildings at all. See there were no lights on in any of the apartments, as seen per the original collapse video as well as the one recorded minutes before. So no one in the entre building left any lights on at a mere 1:30 am? Odd to say the least. And as viewing the known controlled demolition, there isn't a single piece of patio furniture on any of the balconies. Then on top of that the news never showed the owners walking out and evacuating with their prized possessions. But they did catch residents from another condominium being evacuated and interviewed them. Odd don't you think? You gonna buy all the bs the news produces? They are government controlled and have all the tools of Hollywood at their disposal. Would they? Because it's more than obvious they COULD. which is so dangerous for all Americans to afford them such great power. We will literally believe ANYTHING they put in front of us. That's obvious too. What if Stalin or Hitler or Mengola had this under their power, what kinds of things might they do? I bet they will not build a memorial for all the victims there, my guess is an even more expensive luxury beachfront condominium.

[@paulmerritt418]

I can’t even watch some of the other channels covering this event any longer. Your analysis is superior to the others. Thanks for these videos. I think most of your viewers realize how much work and preparation it takes to produce. 👏👏👏

[@tonyjackson4099]

It's so obvious a lot of those guys are just watching this channel and then trying to present the info as if they knew it themselves. In reality, their videos are literally just like really bad book reports from 4th grade. It's basically atrocious "video-plagiarism." lol

[@henrymayer264]

Could a lot more condos be at risk? I can't see this being an isolate incident to this single building.

[@crankychris2]

I understand that the residents of Champlain North (same construction) are somewhat concerned, being only 70 feet away.

[@brocluno01]

If that section of the parking floor was cut out and replaced, did they not find water/void under the repair area? Is there no repair construction report? What was the volume of concrete pumped into the repair? Did they have to add gravel fill before pouring the repair slab? How and to what did they attach the repair slab rebar?

[@cjdmoon4150]

Great point. Did they import and compact material to fill a void? Was there a moisture barrier of some type where the concrete was removed?

[@waitaminute2015]

In the Caribbean on seafront property, I've seen abandoned buildings more than 40 yrs old and they never collapsed. Roofs may have in and rebar exposed but never a collapse. Something in the ground here either changed, or wasn't considered at the time. There's other buildings in the area with the same kind of garage flooding that need to be looked at in the same way.

[@MrEvpatoria]

Exactly. This must be an awful, awful design. Most engineers couldn't come up with it even if they tried.

[@protipskiptoendofvideoandr286]

Sounds like a possible sinkhole which flordia has something like 22k of them that we know about

[@drofwarcnwahs2108]

@@protipskiptoendofvideoandr286 Most of the sinkholes in Florida are due to soil/water erosion of the limestone layer which occurs in many places throughout Florida. It actually dissolves the limestone. However, many places in Florida do not have this limestone layer just just below grade level and therefore traditional sinkholes won't occur in these areas. This property was built on sand with no limestone layer immediately underneath grade. If it had limestone underneath they would have simply drove the pilings down to the limestone and be done with it.

[@nodnoc]

Caribbean islands have different geology than the barrier islands of Florida.

[@waitaminute2015]

@@nodnoc they must. I'm just pointing out it can't be bad maintenance. How many abandoned buildings are there in the world. Every post communist county has abandoned buildings rotting away.

[@msjessicahall]

I just learned sooooo much about how building foundations are created. I've always wondered about them and thought " oh thats too complicated for me" but you totally broke it down into an easy to understand and interesting video. Thank you! I just subscribed. And out of all the theories I've heard so far, this one makes the most sense.

[@pennybuys3891]

Excellent presentations...... I am an 80 yr old woman, and I really look forward to new entries. You are quite brilliant do a fabulous job in explaining engineering basics and more. Thank you

[@NickanM]

He is a natural as a teacher, I'm 51 and have no experience in this field at all, but I understand his videos 100%. Great guy!

[@windsofmarchjourneyperrytr2823]

Please never tell anyone online your age, your real name, address and so on...people will use it against you.

[@NickanM]

@@windsofmarchjourneyperrytr2823 I don't have any other kind of social media, no Facebook etc etc.

[@restyourheadsoothingrelaxa2729]

You have a gift, sir, of making complicated matters understandable for all laymen out there. Thank you! Please keep up this channel.

[@phillipaspinall8745]

That was like attending a really interesting lecture, well done

[@anerexicsumo5512]

you and Jeff are the only people i seen so far that give a great explanation and go in depth with your research

[@deeanna8448]

This channel is amazing! I know nothing about engineering and I understood everything in this video. You're a good teacher!

[@andrewellicott654]

Josh, the algorithm brought me to your channel after the collapse and I’ve been hooked ever since. I really enjoy your videos keep up the excellent work. How about those hand-drawn structurals?!? CAD has spoiled us surveyors and engineers 🤣

[@BuildingIntegrity]

Indeed!

[@CollapseOfChamplainAndMore]

@@BuildingIntegrity I’m so glad I found this we’ve been watching the water with the neighbor for a couple of days now and we were all asking this question. This is what we see kzbin.info/www/bejne/jZ2aqZyDmL6jh7M we also seen the columns before they were cut and the skinny pylons looked flat on top ?

[@auntijen3781]

@@BuildingIntegrity FYI did you see this eyewitness report from the engineers on site? kzbin.info/www/bejne/j6S6l4GJo9uFjZo The engineers examining the debris are finding that the original drawings DO NOT match the construction (final product)... Where the drawing indicates 4 steel rods of rebar in slab/columns there are actually only finding 2 rods...? = A 50% reduction in "Building Integrity"?! IDK what to make of this data but I figured you would. Like, wouldn't this call into question many buildings of that era, regardless of ongoing repairs made or not? Bc the actual plans were not reflected in the actual construction bc obviously the inspectors were not checking these basics? Thx.

[@laurasalo6160]

@@auntijen3781 makes one worry for the Champlain North Building

[@Asrock73]

Disaster’s are almost never caused by a single thing, but by a series of minor things that in themselves wouldn’t be bad but when added together they create the accident.

[@punker4Real]

can't wait tell we get to see a new Seconds from disaster

[@meghanhause9435]

Here is a quote from NatGeo's series Seconds from Disaster "Disasters just don't happen, they are trigger by a series of critical events...".

[@rumblehat4357]

It's usually a chain of events. Break a link in the chain, the disaster doesn't happen.

[@windsofmarchjourneyperrytr2823]

Not every day it makes completed 40 year old buildings fall over, though :)

[@1whocs486]

Who in you tube land hit the dislike button on this video??? This was the best video I've seen or actually all of his videos are excellent...

[@kevinchambers4848]

It tends to be liberals that hate to listen to facts because it hurts their feelings.

[@ArthurDentZaphodBeeb]

I down voted this particular vlog because I think he's really stretching on his ideas. He's seeing boogiemen everywhere he looks. Sure, there may have been differential settlement and maybe a void space, but the visual evidence shows relatively minor issues before/after the collapse near the foundation/basement slab. The cracks in the basement slab do not appear extensive (not enough that would lead any engineer to conclude there were serious, structure-compromising subsurface problems). Nor did the building show the telltale signs of distress that you'd expect in such a structure if what he is suggesting was actually happening. (if there were signs of meaningful differential settlement, they'd have likely installed piezometers/inclinometers and been monitoring the building closely - the consulting engineer in 2018 would surely have made mention of signs of differential settlement - but not a peep was made). He's dumbed-down his explanations to suit an uneducated audience, so it all sounds plausible to a layman. To someone who's in the business and done lots of foundations/concrete work and repairs on structures, I see a lot of dubious statements. What we have seen is ample evidence of the pool deck and plaza deck leaking like a sieve over many decades, causing significant spalling and corrosion of the slab. We are all-but certain the initial slab collapse was centered around the leaking planter area - which jives perfectly with the photographic evidence prior to the collapse showing extensive leaking/cracking of the slab in that area. We see almost no evidence of any damage at the basement slab/column interface now that the debris removal has exposed the basement slab - all the columns look good - if his conjectures were anywhere near accurate, we should have seen twisted/buckled/damaged column bases - but we simply don't. His other vlogs are excellent and I've upvoted all of them. This one had me shaking my head repeatedly.

[@georges7340]

Trolls at every turn on KZbin!! They need to get a life!🤣🤣

[@1whocs486]

@@georges7340 yeah..I just don't get it... Ignorant

[@comment6864]

First place to look when buying a home - THE BASEMENT. Don't even bother looking at the kitchen, the baths, the hardwood floors. Those actually tell you exactly nothing about whether you should buy the place or not. The basement tells you everything. If the basement shows even the slightest hint of not being bone dry, LEAVE, Don't even bother with the baths and kitchens, the granite countertops and walk-in closets. Unfortunately the dildos that comprise the real estate 'industry' will never tell you that. They will harp right away on the 'updates', steel appliances and crown moldings. But here's the test if they're qualified for anything more than unlocking a door - ask them what the difference is between a furnace and a boiler (expect to have fun with that one :)).

[@alisont.6940]

We don't even have basements in California.

The real estate industry comprises dildos. No one ever uses the verb "comprise" correctly. :(

[@andrewterrebonne7015]

Here in So.Louisiana, if you dig a 2 ft. Post hole and take a lunchbreak, you'll come back to a hole full of water. Building a 30ft. deep coffer dam is a lot of fun.

[@simonhodgetts6530]

Absolutely - shiny things sell homes, a sound building structure is sometimes secondary. In London developers have been underpinning 3-4 storey properties to build garages below the ground floor, undermining the structure and that of surrounding properties - there have been a few collapses - and all for that valuable parking space.

[@BexnRN]

Good thing I live in the South! A lot of places here don’t have basements.

[@oldervermonter7396]

Thank you for your information on concrete and water. I always assumed it was was basically water-resistant. I always wondered why the Crown Point Bridge (VT-NY), which looked well maintained, had to be replaced because the concrete pillars had corroded away and the bridge was in danger of collapse. Now I understand.

[@RobMancusoJr]

We love ya Josh! Keep up the great work! Never thought I’d find this so fascinating but that’s because nobody explains these difficult concepts better to those of us not in the industry. Looking forward to the next one...your channel will definitely keep growing with this top quality content!! 👍👍👏👏

[@paulakay4109]

This guy could make a video on paint drying and make it interesting . I love your videos… very informative and easy to understand. Thank you!

[@lblancelot]

I just can't believe that someone couldn't say "Stop watering those planters!!" Unbelievable! Aren't the planters located above the garage spaces where there are constantly puddles of water? 🤦🏽‍♂🙄😣

[@redneon06]

Agreed

[@luv2467]

That wasn’t the sole factor

[@windsofmarchjourneyperrytr2823]

Wouldn't you think they'd use self-watering planters? The large plastic ones for tomatoes work great. The water backs up the hose slot when it's full. Something like that would he smart and would at least greatly reduce the water. Tomatoes you have to water daily, but most plants are just once a week. If that. When it's humid, it's less.

[@charlesrogers7275]

My background is in predictive maintenance where a thermal imaging camera is used to detect temperature differences. This technology should be incorporated in scanning the lowest levels of these types of buildings on a periodic basis in order to detect moisture penetration within the concrete. The moisture on the outside of the concrete may not even be visible to the naked eye , but the temperature difference caused by the moisture saturation will be seen in the thermal camera as having a lower surface temperature. The severity of the moisture penetration will be indicated by the area of coverage. This application was used on a office building where the office spaces located below ground level were experiencing wet ceiling tiles. A removal of the ceiling tiles was performed for a thermal scan of the underside of the upper concrete floor. The images showed a distinct separation between the saturated section of the concrete floor and the dry section of the concrete floor.

[@williammcginnis7428]

How deep can the scans go? I have wondered how foundations and piles are checked after these midrise buildings have been getting thrashed on the beach for 30-40 years? Or how are interior columns checked that are covered up with kitchens, vanities, walls etc.

[@charlesrogers7275]

@@williammcginnis7428 Thermal imaging only shows surface temperature of the object being scanned. This measured surface temperature can be the result of the transfer of the temperatures from the inside of the object to the outside, or it can be just from the surface. If you place you hand on a cool surface and them remove it after a minute, you will see the thermal outline of where your hand was. If an object has a covering over it, or behind a wall, then there will still be a transfer of object's internal temperature through the external covering. But the actual surface temperature of the covering will be slightly, or significantly, different due to the laws of thermodynamics for heat transfer. Heat travels from hot to cold. I would expect the temperatures on a column that is severely saturated with water to be cooler temperature than a column that is less, or not, saturated. This is due to the effect of heat transfer from the saturated columns to the large mass of colder underground/basement flooded water. Also, if a column is saturated with water, then there would be temperature gradient starting at the lower part of the column (cooler temp.) and going to the upper part of the column (warmer temp.), or from the most saturated area to the less saturated area. Additionally, if a beam is saturated, then the thermal image will show where the moisture is entering and how it is spreading. I am not familiar with the current methods of checking of foundations and piles on building. My posting is just to offer a suggestion to incorporate thermal imaging technology to test the columns, floors, and beams of buildings near the water. An initial thermal scan can not only provide a focus of areas that may require additional methods of testing, but also provide a method to aid in helping to determine the condition of a building. This is a non-destructive testing method. Thermal image scanning provides immediate results.

[@Admin-tm8gp]

My Educated guess! *Chlorine pool water 40 yrs of storms overflowing the pool water! *Waterproofing failure ! *DECK punch thru shows connection failure at pool deck columns! ( look at columns still standing) *Column connection *** *Column connection undersized rebar ? * Not Enough rebar @ column to deck!!!!!!!!!!!!! *Rebar single strand at bottom of deck !!!! More info needed

[@juliefizpatrick513]

Excellent details-I never thought I’d be so interested in this but I am very much so because I have friends that live in a beachside high rise:). Thank you👍😊

[@dianajin3861]

I don't have an engineering background at all and I learned so much! You've done a great job as an educator. Bravo! Great pacing. Descriptive visual aids helped me learn new jargon quickly. Your live-drawings were effective. I got everything crystal clear on the first watch except your justification on why you think the slab was not built right on top of the piling caps (allowing the water table delta and soil consolidation to create the void). I think that portion just went too quickly for me and upon 2nd watch, the visual aid didn't match the slab-right-on-top-of-cap scenario. I got your justification on the 2nd watch! Keep up the great work!

[@winnielanza6195]

I finally decided to subscribe to your channel after watching all your videos regarding the collapsed Champlain condominium. I don’t know anything about buildings but your explanations are so easy to follow; very interesting and informative.

[@NickanM]

_I never thought that building engineering could be so interesting, at the same time I'm sad that it took a tragedy to make me look into this._ May the victims rest in eternal peace. 🌷❤🌷

[@jaydoe5654]

As a concrete nerd I find these videos very interesting. Thanks for making them

[@Jamie-zs2bl]

The water lines on the bottom of the columns was one of the first things I noticed when I first saw that garage video. The outside of my house looks like that too, but worse, because it is missing stucco and can see the framing lumber in some spots. But I recognized the water lines right away, because it's something I see daily. Crazy.

[@victorpalamar8769]

I live in Edmonton, Alberta, in Canada, and everywhere salt is spread on sidewalks to melt the snow, the cement crumbles and eventually splits where the underpinning of gravel and sand is uneven.

[@HGrrrr]

Wasn’t there a mall collapse near there? Due to many winters of spreading salt on the parking garage (which was located above part of the mall)

[@victorpalamar8769]

@@HGrrrr It wasn't collapse, but a teenager who was suicidal) set fire to his car while he was in it inside a Sherwood Park (municipality north of Edmonton) multi-level parkade.

[@wyomingadventures]

Victor, yes. Spreading salt in the winter makes the concrete crumble. Have seen this many times around here.

[@HGrrrr]

@@victorpalamar8769 oh, I must be thinking of another mall collapse in Canada

[@famousutopias]

@Heidi Grant you may be thinking of the Algo mall collapse. kzbin.info/www/bejne/aKWyYn9piLCbnLc

[@stephencrouse6032]

Thanks Josh for your efforts including explaining critical terms and structural features. Here's some subsequent questions: - Wouldn't evaporated sea water leave a serious residue? - Can water under hydraulic pressure percolate between different concrete pours (subjecting the connecting rebar to exposure)? - Can Differential Settlement easily open/increase a liquid infiltration path between given pours? - Won't the biggest manifestations of Differential Settlement occur in the walls/ window frames/ door jambs?

[@montenague]

I want to express how much I love your channel - I am completely captivated by this series. You are an incredible educator - I really mean that, I hope you are teaching a new generation with such a talent. Happy you are here and I will continue to watch.

[@laurageorge7808]

I find your videos fascinating. My family thinks I am a nerd when they ask me what I am doing, and I tell them to please leave me be because I am watching my favorite engineering guy!! 😀 Please keep these videos coming because I am learning so much about such a horrible event that does seem like a perfectly tragic storm.

[@rebecadiaz7005]

So clear and easy to understand even for people that English is not first language. Congratulations and thank you !

[@billfly2186]

This is what Josh does for a living. He's obviously excellent at it. He's the guy you would hire to check out your building. The fact that he's being fair and thoughtful in these videos speaks well for his strong ethics. Well done sir!

[@MrCpgallagher]

If I lived in the fallen building's twin up the street, I would get out ASAP.

[@soho71]

“Perfect Storm” exactly, a series of unfortunate events lead to this devastating collapse.

[@michellem7300]

I agree. When he showed the water table I just got a sick feeling in my stomach. I don't think the people that lived there realized how big the problem was going on underneath their homes

[@soho71]

@@michellem7300 my problem now is, there had been numerous “fixes” done to this building.... some one knew the potential of these issues and nothing was done due to what I feel is greed. They could have pumped concrete under the basement parking deck.....but we have the privilege of hindsight.... prayers to the victims and family.

[@mightymouseofnyc]

So very clear and concise. This would be fascinating if lives lost wasn't involved.

[@just_passing_through]

Two two aren’t mutually exclusive. It can be both tragic and fascinating.

[@frankmiller95]

lt's still fascinating and the unnecessary loss of life makes it even more so.

[@Jeni10]

If you go back to his first video on this topic, you can learn along with each video. Josh is a great teacher! Understanding how it happened can help us all be more aware so it doesn’t happen again. This gives meaning to the loss of those who died. They would want to understand it too.

[@N0xiety]

You wouldn't even be checking this out without the building collapsing so...

[@just_passing_through]

@@N0xiety I think what they’re trying to say is that if they had evacuated the building before hand and it collapsed with no one inside, it would be fascinating, but because people died it’s not fascinating. Which is completely incorrect. It’s just as fascinating regardless. Because people were killed, it’s also tragic, but that doesn’t make it any less fascinating.

[@ColourMeHarpy]

Another fascinating video, thanks again!

[@serealll]

A tragedy brought me to this channel; but I’m very glad I found it. This is by far the best, most informative, yet educating channel on this topic. I’ve actually gone back through and watched old videos, all of which are fascinating. Very well done, Sir!

[@jenniferwhitewolf3784]

I only discovered this channel after the collapse. It has been a refreshingly honest and critical look at the event.👍

[@erika8627]

These videos are so informative! Has anyone else seen the video by Rako Studios that shows that tourist video 7 minutes prior to the collapse with the colors enhanced? It really shows the inside of the parking garage a lot brighter showing the water pouring down from the ceiling. You can see the debris from what looks like the planter and pool deck that collapsed. It does not appear to be any of the columns. It's interesting. Thank you for this channel.

[@PaulJersey]

Great video as always!

[@kramsdrawde8159]

You have a excellent way of speaking to the non-engineer and not condescending. My father and I both were in consrtuction in the 70' s & 80' s and it seemed like concrete rebar construction was bullet proof, that's what shocked me about this. The enviroment and especially the sand seem to be a bit of a factor, and I am quite sure salt enviroment didn't help especially with high tides and storm surges from heavy storms and hurricanes. YOU HAVE THE BEST ILLUSTRATIONS I've seen !!!

[@that_onearmguyyy4618]

who else thinks this guyyyy is just amazing ?

[@Truthnowalways]

He's the best! He definitely would make an amazing professor at a university!

[@SarahRWilson]

Hand raised!

[@TELEFEXLLC]

Another great and detailed analysis. Hydrostatic pressure can be an enormous force. Will easily crack slabs if the water table is as high as you describe. Thank you again.

[@tommays56]

Every-time I dig a hole at the beach I HIT saltwater really FAST

[@justinavery4047]

That's what I was thinking....

[@rollothecat2010]

Yes, I notice that too on beaches in California. I guess it is common on all beach front property. I forget how far away from the beach/water edge the tower was. It was mentioned on another channel video right after the collapse. Some people in California build houses right on the beach. I would not want one of those houses. I have seen how severe storms, not hurricane force, have swept away entire beaches, damaging houses built on the edge of the beach.

[@dafungusamungus6742]

@@rollothecat2010 i think they said it was like 400 ft or something. Very close.

[@rollothecat2010]

@@dafungusamungus6742 Thank you. That is far enough to not be a factor in terms of beach damage reaching the building. However, I do not know anything about hurricanes. I have been through tropical storms here and also blizzards when I lived in the Northeast.

[@dafungusamungus6742]

@@rollothecat2010 yea man it was a weird ass building design. Why did they have the bottom hallowed out and standing on pillars? That just means if one beam fails they all will. There was no redundancy since that will drop a section of the building. They just assumed none of the pillars would fail. And boy they were wrong.

[@jochenliebig1562]

This sounds very plausible and it's kind of scary.

[@MaryMacElveen]

I wonder how many more buildings are in trouble here in Florida.

[@jochenliebig1562]

@@MaryMacElveen Indeed!

[@nodnoc]

The way he describes how the water table affects the soil would make you think that every structure built on the beach may have this very same fate

[@gorillaau]

@@MaryMacElveen The answer for apartment owners might be don't ask.

[@jochenliebig1562]

@@nodnoc Yes, exactly! So I think we need a follow-up video. Is it common for voids to form? Is that always an issue? Are newer buildings better-equipped to deal with it?

[@sarahb.6475]

This is just SO fascinating and one of your best videos to date!! And your drawings and explanations make these things SO easy to understand too!! Bravo for being able to explain complex things so well. I never dreamed I would find building engineering so fascinating!! And on another note we have a somewhat famous building here that is sinking into the ground. It was built on former swamp land. I guess somehow they got rid of the swamp but I am not very clear on that bit. But there used to be a store in the ground floor of that building and I believe there are apartments upstairs. Scary to think this sort of thing could happen to that building too!! Never realized a sinking building could be that dangerous!! Other thoughts that come to mind include: 1. How do you know the pilings are straight in the ground or they stay straight after years of water abuse? You said they are like nails and all of my nails tend to go in crooked!! 😳 2. Erosion!! Maybe the ocean swept lots of the ground out from under the building and created a sort of deep nook or cave? Not on the surface but deeper? I see what erosion does to cliffs here and then without warning big hunks just fall! And dont forget sink holes! 😳 what if a big sink hole is under the building? I think that would be the absolute most interesting thing, to find out if some huge sink hole or other hole is actually under the building!!

[@davidiler5961]

Would the massive amount of dewatering that took place during construction next door be a contributing factor - especially if it dropped the water table for a period of time ?

[@1800imawake]

Yeah I was wondering that too they sure had a lot of pumps during construction.

[@andreicristian9575]

They'd just be pumping the water that infiltrates through the ground into their construction site, so water that's already exiting through the ground. So unless they were pumping it into the garage next door, then no it should have absolutely nothing to do with the collapse.

[@inlikearefugee5194]

The removal of water would be the positive thing for all the buildings.

[@davidiler5961]

Water seeks its own level, even though the next door excavation had a sheet piling wall around the perimeter with the amount of pumps required an the volume of water being removed daily and the water table being 12+ feet above the bottom of the risers, there would have been some affect on Champlain Tower, especially if the storm water holding tanks and deep wells were built according to design, the question is how much of an effect did the dewatering have.

[@davidiler5961]

Think of the ice in the glass of ice water as the dirt/sand/soil, what happens to the level of the ice when you suck all the water out with a straw? There’s a critical balance to dewatering and with the amount of pumps being used they would have been more the able to drain a swimming pool in less then 5 minutes, that’s a lot of ice cubes falling to the bottom of the glass.

[@atomicplague157]

There is also a surviving family who said the cars began sinking into the ground in the parking garage.

[@TheLastBabyBoomer]

Awesome stuff and an excellent presentation. Why isn't this stuff taught in high school, at least the basics!!!???

[@marych3425]

I can't figure out why you don't have a lot more subscribers. You are excellent.

[@gerardacronin334]

It’s a relatively new channel. Give it time, and recommend it to your friends, especially if they are condo dwellers. Go check out the Blancolirio channel with Juan Browne, a pilot. He had only a few thousand subscribers until he began investigating the Oroville Dam Spillway failure in 2017. He now has about 260,000 subscribers, because his reporting and analysis is excellent. He focuses on aviation. I am hoping that this channel will grow organically in the same way.

[@paulazemeckis7835]

@@gerardacronin334 love Juan's channel...of course I luv aviation!

[@mangos2888]

@@gerardacronin334 I shouldn’t be surprised to be the only Blancolirio subscriber now subscribed to this channel, yet I am. Cheers to intelligent KZbinrs!

[@NickanM]

He had around 650 subscribers when he posted the first surfside video, and I subbed ASAP since every video he has is very good.

[@windsofmarchjourneyperrytr2823]

Because most people hate to think. See what's in the news feed today...lol

[@cardbored_]

This guy is the best, most reliable engineer on KZbin talking about this. There’s one guy who went way off the deep end with conspiracies and poor experiments.

[@monicarico733]

I think the uptick in viewers went to his head. When he starting picking on the rescuers and engineering professionals, I was done.

[@cardbored_]

@@monicarico733 the fact that you knew exactly who I was referring to is perfect

[@TSUNAMI-MAMI]

SweatyVanHalen that Ostroff dude or whatever, right? He’s a nutcase

[@85jmccoy]

You have a great way of explaining things and if your not a teacher you should be.... I studied automotive technology in 08 and have been a tech and in the field since,but I've found myself bored with it and this is really interesting to me.

[@gerardacronin334]

He’s teaching us on this channel.

[@TSUNAMI-MAMI]

Never too late to learn more or go back to school 🤗

[@85jmccoy]

@@TSUNAMI-MAMI i know.... I but I'm 36

[@85jmccoy]

@@TSUNAMI-MAMI i make a decent living now if I go back to school that means I have to spend more money and still work full time and start all over again from the bottom in a new career such as engineering

[@kareltracy]

Numerous reports immediately after the collapse mentioned the slope of the pool deck not allowing water to drain. Could differential settling have changed the original slope of that area from its original constructed grade?

[@drdrew3]

The original slope of the deck was eliminated when it was resurfaced with sand and another layer of tiles. The drains were raised to be flush the new higher level. This means that despite any slope there was no drainage until the sand and tiles were saturated. Besides the extra weight much of the standing water made its way through defects in the waterproofing. Poor drainage, extra weight and accelerated concrete damage and you see the result

[@ShiftGolf]

Did the Bldg sinking ever cause interior items in the bldg like windows or doors or even elevator shafts to get out of alignment, or any interior walls in hallways or units have cracks appear from stress?

[@farmboytom2]

He said the movement was slight and not noticeable. Millimeters a year. If this happened before lasers were invented nobody would know it was happening. These buildings are full of short gain investor who dont want to hear about five digit assessments.. This could have been prevented if addressed on time. Time for a governing agency to step in when making a quick buck gets in the way of common sense.

[@windsofmarchjourneyperrytr2823]

@@farmboytom2 Sense isn't that common. Lol

[@1966human]

I bet the foundation was below sea level, salt water exposed, the lower middle of the building fell a split second before the top and then the last standing whole section, there are going to be many more high building and small ground area building collapses in future you mark my words

[@patriciaalden5783]

The apartment was set to blow and pancaked down just like building demolition. Been proven.

[@C4PTAINinsano]

@@patriciaalden5783 lol not everything is a bomb. This was obviously Jeff Epsteins ghost

[@natsfan100]

@@patriciaalden5783 Some halfwit sperging out some some baseless claims isn't proof

[@garyc39]

I think your right

[@garyc39]

@@patriciaalden5783 If it was set to blow, all sections would have fallen at the same time.This fell in sections from weakened concrete.But any thing is possible.

[@janerubeo8318]

Thank you! You make everything so much easier to understand!

[@eduardocarvalho1547]

Thanks!!! I was waiting for you to speak about the garage columns.

[@davidmorin7939]

Thank you for sharing some outstanding content with everyone! Your grasp of concepts and your ability to share your knowledge is greatly appreciated...

[@Melaniexb1]

Thank you for this wonderful, educational explanation of foundations!