Remember everyone, unlike others in the media and YT, the purpose of these videos is not to speculate on the definitive cause of the collapse, but to instead explore and think through all possible contributing factors. And on that journey to hopefully teach about construction and engineering principles. Thank you for you support!
@Kneumann19913 жыл бұрын
Dude seriously. I'm an electrician. That light is hundreds of amps of electricity arcing. Thats why they are blue flashes. Its the electrical lines ripping and shorting out. *smacks head*
@willschultz54523 жыл бұрын
Your the most professional and reasonable people on here! There are alot of wacky idiots on here posing as a engineers!!🙄 keep up the good work!! Thank you!👍
@BuildingIntegrity3 жыл бұрын
@@Kneumann1991 thank you. In the middle of filming, it is sometimes difficult to articulate a thought. Electrical arcs is what I was thinking... exploding electronics is what I said... hehe thanks for the insight!
@willschultz54523 жыл бұрын
@Carmine Fragione thats the most idiotic statement ive seen yet!!🙄
@willschultz54523 жыл бұрын
@@Kneumann1991 LMAO You better find another job then! There wouldn't be any electrical arcing on the outside of the building ,all of the power lines would be incased in steel conduit and would be in the center of the building in a shaft of some sort. Also, As soon as those lines shorted out the breaker would have tripped immediately.
@lindap.p.13373 жыл бұрын
People….people….have you not watched his guys videos? He was one of the first to tell us the bottom collapsed first. He is great at explaining this, please go see his videos. He is NOT trying to say the roof went first. He is refuting that info and showing us the proof. He is very knowledgeable, wonderfully vocal, and a super teacher. THANK YOU Josh!
@tamaramaule69283 жыл бұрын
this is the best one ive seen kzbin.info/www/bejne/hnazqnhonZuDas0
@BuildingIntegrity3 жыл бұрын
I have seen videos on KZbin with titles like "cause of" collapse or "proof (such-and-such)" caused the collapse. It's really awful and extremely speculative content. As I have said in previous videos, we will not know the modal cause of the failure until the debris is fully excavated and the final report is released by the forensic engineers on site. The purpose of these videos is to look at things that could have contributed to the collapse and how. These are the same things the investigators will look at and consider as they work through the scientific process.
@nobody83283 жыл бұрын
"When a headline asks a question, the answer is always No." ~ancient wisdom
@hmarbermudez26603 жыл бұрын
thanks for your excellent and intelligent commentary.
@VoyagetoLove3 жыл бұрын
Josh is the best. We enjoy his knowledge and passion for engineering.
@Inaroshi3 жыл бұрын
As a civil engineer myself, I'm very interested and invested in this event - but I was rather disgusted by so many channels playing you-heard-it-here's and trying to tell everyone that T H E Y have the answer. I was really hesitant to watch your videos because I do firmly believe that this is something that has to be investigated thoroughly and methodically and conclusions shouldn't be drawn before the end - but I was pleasantly surprised by the first of your videos I watched. I love the clear breakdown in terms that are both technical enough to be accurate and layperson-friendly enough to educate, and the careful acknowledgement that this is a developing situation where stuff is going to be discovered and continue to evolve. Anyway xD Sorry not to ramble. I just wanted to say I've been loving your breakdowns :D Thank you for helping to dig through this mess!
@JohnD-JohnD3 жыл бұрын
Agrees. We haven't found the smoking gun yet, and it's all speculation. I was looking at this building through Google street view and watching the collapse to see if any clues were given.. My theory (for what it's worth).. Sinkhole under the parking garage.. I think that would cause a collapse consistent with what we see.. but again, it's just my theory and watching what comes out of the investigation.
@billiamc19693 жыл бұрын
@@JohnD-JohnD Most of these buildings are POORLY maintained and are beyond the useful life span...all of these 70s and 80s buildings need to be demolished for the sake of human life.
@wintergarden75393 жыл бұрын
I know absolutely nothing about building construction and design. I have found these videos to be highly interesting and very educational to the lay person. It's the manner in which he explains everything. Only a person who has thorough knowledge of their occupation can explain concisely to lay people. Compliments from a tax accountant who also has to explain multifaceted technicalities to lay people (my clients).
@Fix_It_Again_Tony3 жыл бұрын
I also have been staying away from other videos on this topic (also an engineer - electrical). Methodical, measured analysis without reaching conclusions that aren't supported by evidence is not a hallmark of KZbin, or the internet in general. Low bar of entry means many uninformed opinions. Always nice to watch videos that do it correctly and that is why I watch these videos.
@jasonhaynes29523 жыл бұрын
A good engineer will explore all avenues and wait for extensive information and tests to come out before drawing a conclusion. These videos are great!
@thetrainwreck14693 жыл бұрын
If this video series helps even one person, it was worth it.
@studyinginthedesert76903 жыл бұрын
I've learned a lot, especially about what concrete damage can look like & how serious it is.
@Brucev73 жыл бұрын
Unfortunately, the Owners will usually look at the bottom line. Why loving God and living your neighbor is important.
@CaptainCaveman11703 жыл бұрын
I know for a fact this tragedy, and these awesome videos, will save lives, because a lot of people assumed this couldn't happen in the US and now that we know it can, all the buildings in the US will be under a lot more scrutiny by normal people, not just engineers. And retrofit engineers might have an unlimited supply of work moving forward.
@davebrewer92793 жыл бұрын
I’ve been putting off necessary repairs to my house for years. There’s always an excuse. I’m in a wheelchair so it not like I’m drinking beer on the couch while the house crumbles around me. After this building collapse, we had a “Come to Jesus “ at our house and made a prioritized list of repairs. We will be doing without some things for a while, but I can’t imagine what it would be like to have my crappy townhouse burn to the ground and know that I displaced three other families because I didn’t pay an electrician $1000.
@seedplanter71733 жыл бұрын
It isn't helping anyone, it's actually making people dumber.
@Stevesbe3 жыл бұрын
I remember 15 years ago i was doing plumbing service work in these buildings i remember going to these mechanical rooms and looking around seeing rust coming out of the concrete and thinking these places are scary
@bapt_andthebasses3 жыл бұрын
15 years ago... dear lord
@robc59553 жыл бұрын
Building Engineer from the UK here, firstly my heart goes out to all those who lost their lives in this terrible event, second really enjoying the analysis as tragic as this is learning the failure mode is always the key to prevention - this is the best I’ve seen so many thanks for taking the time, all the best from the UK.
@caseyg583 жыл бұрын
I'm so glad I found this channel. We are all wanting answers. Although the actual investigation will reportedly take months to complete, these videos help to try to make sense out of something so tragic. Thank you Josh for the time and effort you put into making these videos.
@Brucev73 жыл бұрын
Check out the previous vid eye opening
@chuckduzzie85293 жыл бұрын
Yes, we all want answers. We want to learn so this doesn’t happen again. But this building is 40 years old, the accident at the Hard Rock Hotel in New Orleans was only 18 months ago and the same mistakes are being made today!!! Somebody is asleep at the wheel ...
@Brucev73 жыл бұрын
@@chuckduzzie8529 Owners are only interested in the Bottom Line. Why loving God and loving your neighbor is important.
@sandragrant50353 жыл бұрын
Barbara he's not sure what he's talking about either the last week he had a whole different view
@caseyg583 жыл бұрын
@@sandragrant5035 My thought is that he made the video to rule out that a roof collapse caused the building to fall. That’s how I took it at least.
@laresistant3 жыл бұрын
These videos are so logically, thoughtfully presented and really help the listener understand structural engineering practices. Thank you so much for making these. I never thought I would find engineering so fascinating!
@mrwhiteinca3 жыл бұрын
Good video.. I am a certified and licensed roofing contractor of 30 years in Los Angeles. I agree there is no reason to believe the cause of the building collapse was the roof. In fact the roof was underloaded, not overloaded, here’s why. The existing roof is a hot tar gravel roof which consists of #4/5 tan gravel generally applied at a rate of five 90lb bags per 100 square feet for an installed weight of approximately 4.5 Pounds per Square Foot or PSF (not including the membranes and hot tar, total installed weight approaching 6 PSF). So the roof used to be tan, we know this. Since it is now black, it's quite clear that they have swept all the loose ballast off which is the first thing I would do if I were going to resurface this roof, it's standard operating procedure, since the roof is now black and not tan and we know they're in the middle of a roofing job that makes sense. The pile of material (approx. 50 or more rolls - enough for at least a large portion, if not the entire roof) is clearly various membranes that would be used in a built up roof process with hot tar and gravel, it is NOT just for patching in anchors, this is FAR too much material for simply patching in some anchors - I would only need a couple rolls of a smooth flame applied membrane to waterproof say, 30 of those anchors and I seriously doubt there's more than 30. The point is that a good portion of the installed weight of the roof was already removed. Those rolls should not have all been located in one spot on the roof that's pretty lazy of them but it's not a massive amount of weight they are mostly not very heavy consisting mostly of a #11 pound roll which is maybe 40 lbs a roll. Again, a bit lazy of them to just put them in one spot, I would have spread them out a little bit but many tons of weight was already removed from this roof when they swept all the rock off so overall loading was drastically reduced. The ceiling fell in the parking garage and I don’t see how any aspect of the roof - even if it were overloaded and it clearly was not, could have affected that. Achems razor - the simplest answer is usually the right one. The engineers and other contractors said they have major structural stuff going on, and what do you know, there’s video of it collapsing in the parking garage. Case closed and stop the nonsense people about bombs. It’s not always bombs.
@martinsnibbor76913 жыл бұрын
Truth bomb 💣 love of money was the cause.
@patburnsent3 жыл бұрын
I agree that the roof we can see in the photo is now lighter but we are looking at the building that remained standing. Do we know for sure they removed the old roofing material from the section that did collapse or is it possible they staged the new roofing material and possibly other equipment on the roof of the section that did collapse?
@laurasalo61603 жыл бұрын
Very informative. Thanks for sharing -- really interesting.
@rollzolo3 жыл бұрын
Hi, this might be off topic but since you're a roofing professional. Can I ask you a question? had my shingles done on my Cape cod home 25 years ago. The planks underneath the new shingles splitting from the nail guns. Is not leaking and holding on as long as possible. My question is it possible to spay on roofing material on the existing shingles?
@russell74893 жыл бұрын
well said
@melissagammage94713 жыл бұрын
your videos are amazing. your ability to explain your expertise in laymen’s terms while still keeping the technicalities is a real gift. thank you so much for all the effort you put into your videos. i have learned so much!
@learnmusic11103 жыл бұрын
Josh, thank you on so many levels. You are not only making something that I know almost nothing about, very easy to understand, but your TEACHING style is fantastic and one that I find myself watching to both understand things here better, but to help my own teaching as a grade 8 teacher. Thank you for taking so much time (especially if you’re on vacation) to analyze things so carefully AND show your integrity as a human being and as a business owner!
@catwaterfalldrought3 жыл бұрын
Your entire series on this collapse has been excellent. I’ve learned a lot and it really showcases your high level of expertise in concrete design, construction and repair. I hope you’ll continue as more information becomes available.
@firefighterchick113 жыл бұрын
Will y’all stop commenting based on the title of this episode. He knows it didn’t start on the roof. He’s simply going into every possibility because that’s how to properly investigate something. You have to investigate all probable possibilities in order to rule them out.
@hellobriii3 жыл бұрын
That’s why the title is a problem. It should be changed.
@chouseification3 жыл бұрын
@@hellobriii is right. It clearly began down in the garage or the pool deck, but the fact that there was additional loading on top may have been a critical factor; it may have lasted another year or two before collapse if they hadn't staged so much roofing material on the roof. Of course if they actually spent the money and repaired those weak beams and added more column-to-span brackets (the rebar was clearly not enough given the punch-through failures) it may have lasted another few decades. Too bad they paid with their lives and not their wallets.
@Isometrix1163 жыл бұрын
@@hellobriii I’m not sure if the title changed, but the question “Did it start at the roof” is the question investigated during the video. When you make a video to answer a question or explore a thought line, the best thing to title it.
@piccalillipit92113 жыл бұрын
Waiting to find out the details is not the Western way of things. You make your conclusion and dismiss everything that does not fit with your now very firm beliefs... This is why the English speaking world is in such a mess.
@thisoldtoad16583 жыл бұрын
He "Thinks" he does not know! and I can see other alternatives that are as viable. At this stage no one knows. Please don't put all your belief in a single theory, ask yourself where is the proof that the PH didn't collapse first. I can see that as a possibility from frame 1, I could even propose that there appears to be dust in the air in place of the PH, blurred due to motion in frame 1. The answer is not in theoretical notions it is in the video, frame 1 and 2, analyse it "correctly" and it will reveal much.
@tylerw82163 жыл бұрын
Your analysis including minor corrections as it moves along, is outstanding. Thank You!
@an6453 жыл бұрын
If you ever decide to teach, the prospective engineers studying under you will be very lucky to have you as their instructor.
@petermccannell75653 жыл бұрын
I'd be surprised if he was qualified to be a university professor, he very well could be capable to getting them. But most engineers don't get those advanced degrees(phd) based off the nature of the work
@Deeked3 жыл бұрын
Everyone telling how you've learned and been taught. I agree. The wealth of information this channel has taught people is priceless. It's good for everyone to know a little bit of how things we take for granted are designed, built and maintained.
@briananderson38013 жыл бұрын
If it had been maintained that's the key ,,,,,,,,it wasn't
@citrineinvestorsgroup57823 жыл бұрын
I just love how you break down every piece of information so anyone can understand. Thank you for helping and allowing me to understand what could've happened. What a tragedy!!!
@SandrA-hr5zk3 жыл бұрын
I haven’t watched a single news outlet video of this collapse since I discovered your channel. They say things incompletely that ruin the point and make things more confusing than it should be. Even when they’re talking to experts, they don’t lay it out in plain terms for the public to understand. I only understood it because of watching your videos.
@chemech3 жыл бұрын
I have seen exactly two broadcasts from local Miami news outlets where they were professional in their approach to the structural engineering issues. One reporter had an abrasive persona, but was technically rather collected. The other was a male-female anchor team interviewing an engineer, and especially the female anchor came across as intelligent and attentive to the details. And that was it for good quality reporting... the rest was your typical TV news airheads, including other anchors and reporters from the same station which aired the best interview. As an engineer - not a civil one - who deals with technical issues for a living, Iam constantly appalled at the lack of basic (like high school general science class level) scientific understanding in our news media... I have to assume that lack of education and ability extends to other topics across the board... which is not good for our society as a whole.
@CaptainCaveman11703 жыл бұрын
Just a couple days ago they were still saying things like "engineers believe the collapse may have started near the bottom".
@beehaven99493 жыл бұрын
At least a Miami reporter was the first to refer to the building as a 13th story building. I thought that was impressive, but still little too slow for the rest of us.
@Veronica.John10-103 жыл бұрын
This is a good one as well kzbin.info/www/bejne/hnazqnhonZuDas0
@lovevideos16993 жыл бұрын
It definitely did not start at the roof. Residents saw the pool deck cave in, plus the couple staying at the hotel next door took video of debris falling to the garage floor, and water gushing into the garage. 7 min later, the building came down.
@davidrosing57883 жыл бұрын
Or another way to phrase it, how could a penthouse floor collapse have triggered the pool deck collapse 11 floors below 7 minutes earlier that resulted in the damage filmed by the couple as seen from the north side of the building down the ramp?
@Jude743 жыл бұрын
He knows this but he’s covering all the theories that are out there. Honestly if it wasn’t for conspiracy theorists he probably wouldn’t have to go this far.
@wasidanatsali63743 жыл бұрын
Catastrophic failures are almost always a series of events that all occur and/or contribute to the failure at the same time.
@jenniferhamels11763 жыл бұрын
You clearly didn't watch the entire video before posting this. lol
@TheArayray3 жыл бұрын
But that penthouse wall is actually missing- so something happened there- and in the garage.
@billrnlaw3 жыл бұрын
Thank you for your explanations. If you don't teach, consider it in the future. I have zero knowledge of construction, engineering, etc, but I have found your methodology of detailing this event more objective than others and extremely informative. I like the investigative precept vs others that are just matter of fact how it happened.
@ryanflyhigh363 жыл бұрын
The “Bright White Lights” that flashed, are from the Fire Alarm System, the strobe lights, being activated due to the Water Flow Alarm System being activated. Water Flow Alarm activation due to sprinkler pipes being broken on the lower garage ceiling. That would be my guess, because I couldn’t figure out why the Fire Alarm strobes were going off , on the surveillance video of the collapse… Great video!!
@beehaven99493 жыл бұрын
That is a great explanation for those lights. The fire protection system may have been triggered 7 minutes earlier in the garage video with the pouring water draining out of the pipes. I am a little confused why this fire alarm would not have gotten everyone awake and heading down the stairwells (I only heard of one couple found in their bed not sure if it was an exception).
@ryanflyhigh363 жыл бұрын
@@beehaven9949 Depends on several different factors… How the system was designed for the building, was it functioning properly, does the alarm alert in the apartments/condos or just in the common areas (hallways, stairwells, etc)?? Civilians would be surprised at how many systems don’t work properly. That’s my initial thoughts, off the cuff…
@Kneumann19913 жыл бұрын
@@ryanflyhigh36 "Civilians would be surprised at how many systems don’t work properly." Best statement I've heard to sum everyone's theories up.
@Milkmans_Son3 жыл бұрын
And those would have some kind of battery back up, would they not? I imagine just a capacitor would probably keep them going for some time.
@michealgoins16253 жыл бұрын
@@ryanflyhigh36 are you an electrician? Fire alarm system lights??! You can do better
@nancydeis71213 жыл бұрын
I am not a smart person but you have taught me so much on these videos it is amazing. I can't wait for the next one. I stay off the news and stuff because they are full of crap and just want to fill the 24/7 air time and I just can't stand any of them. I am so happy I found your channel.
@gorak90003 жыл бұрын
I think those "lights" are electric arcs as wires are getting yanked out of breaker panels or something. You see some similar 'arc flashes' on the roof of the part that's still standing after the first 3 parts fell. Also, if you play the video frame by frame, the lower of the bright flashes goes out at the same time as one of the lights in the condo up and to the right of the flash goes out. The top bright flash goes out corresponding to a light going out in another apartment that's close to ground level in the section that's collapsing a few frames later, and the remaining lights both in the section that was still standing, and the part that's collapsing, go out a few frames later still. This would be consistent with 3 phase power, and each phase faulting one after the other. The video is a cell phone video of someone playing back the actual video on a NVR/DVR security system. You can see the edge of the monitor, and the edge of the security DVR software window in some of the frames of the cell phone video. That building next door must have the original video on their security system. It would be nice if the original video from the security system was released, not just a cell phone video of the video that clearly starts late, and is much lower resolution being a video of a video.
@RealBradMiller3 жыл бұрын
Yes, excellent comment!
@joejoe69493 жыл бұрын
i just said the same think. Then i went down the comments and read you comments i agree.
@1L6E6VHF3 жыл бұрын
I noticed that light, too. My guess is that the light was an LED (light-emitting-diode) bulb. The light darkened later than the others, because a capacitor in the bulb still fed current to the diodes. The bulb had *nothing* to do with the collapse.
@seraphina9853 жыл бұрын
@@1L6E6VHF Yeah LED's don't draw much so their smoothing capacitor can keep them going probably for at least several cycles of the grid frequency they were designed for so probably at least a 10th of a second or so. Hell for an idea just how little power LED's need the driver actually needs to actively make sure they stay dark when plugged into an open mains circuit. They don't draw enough current to short out the phantom voltage caused by capacitive coupling within the household wiring usually on their own. Thus why some LED lights with cheap drivers continue to glow dimly even in an open circuit wouldn't be enough to see at this distance. But still gives some perspective how much a component actually designed to be a good capacitor could sustain a working voltage for.
@actechformallyyomama7463 жыл бұрын
I’ve been in the air conditioning business 46 years. I’ve seen many arcs caused by grounding or phase to phase shorts. The brightness of the flashes is very indicative of either one of those scenarios.
@deborahh25563 жыл бұрын
This whole thing is just haunting. Much like the Titanic. You can't unsee it. It's just horrible. May God comfort those families who lost their loved ones. Prayers to all.
@executivesteps3 жыл бұрын
Better that God explain why he let it happen. I mean He could have prevented it - right?
@deborahh25563 жыл бұрын
@@executivesteps , God can do anything. But He gives us a lot of freedom to live and make our own decisions. Good always comes out of bad if you look for it. Many lives may be spared as now they are looking at questionable high rise buildings across the country that have serious issues, and are of about that age. I just love it when people blame God, and those same people have no relationship to God whatsoever, don't believe in Jesus, haven't fully put their trust in Him, never read the Bible or walk with God from day to day, but they expect God to protect them and never allow anything bad to happen. I'm not talking about the people who perished..I don't know their hearts toward God. I'm speaking of people like you, who make these comments who don't know God at all. Obviously, you don't or you wouldn't have said that. But it's amazing to me that you expect God to help you in time of need. Well let me tell you, that's exactly why YOU NEED God. Because tomorrow is never promised. But I'll tell you what is: that those who put their trust in Christ WILL spend eternity with the Lord in heaven. You cannot kill a soul. But what and Who you trust in today, will determine where your soul goes, the millisecond you leave this life. I do pray you make the right choice.
@executivesteps3 жыл бұрын
Deborah H “I don’t know their hearts toward God”. What a gruesome thing to write. So maybe they deserved to die a horrible death. Get help.
@deborahh25563 жыл бұрын
@@executivesteps , that's not what that means..that's between them and God. Nobody deserves that. And you're talking like a fool.
@glennsmusicchannel3 жыл бұрын
@@executivesteps Get a better hobby.
@raedraconis3 жыл бұрын
Just observations and conclusions based from them, wrapped up in diagrams and explanations that the average layperson can understand. Mad respect for you, sir!
@lowlee783 жыл бұрын
As always, thoughtful, methodical, articulate, without talking down. Well done. Thank you.
@kimberlyperrotis89623 жыл бұрын
The picture showing the red iron on top really shows the pancaked floors as multiple layers. It’s hard to imagine many surviving this, unless there was something strong enough to create a void for them. Truly tragic.
@RobMancusoJr3 жыл бұрын
You’re right, that pic is crazy. It’s eerie to see the pancaked floors so clearly. Unfortunately it’s not too surprising there haven’t been signs of life... 😟
@CaptainCaveman11703 жыл бұрын
There's nothing in the floorplans that show anything strong enough to not get pancaked as well :-(. There probably could have been a survivable space inside the parking garage at the very western extreme (near Collins) but who would have been there at 1:30 in the morning?
@vegasbabyy3 жыл бұрын
Maybe if your unit was up against that other stairwell and it happened to fall just right. Otherwise I don’t see anything that could create a survivable space. Really crazy to see the floors stacked on each other like this. Coming from someone that lives in a 40 floor highrise…
@jasonhaynes29523 жыл бұрын
@@CaptainCaveman1170 Agreed! I thought the only void where someone might have survived is in the parking garage, if a column fell over on a truck or two, and someone was buried in their own car in-between. Unfortunately, that would be the last place to be unearthed, and like you said, it's 1:30 in the morning. Not likely anyone was there at that hour, or that their car was in the right place.
@user-bw3fl7fj9w3 жыл бұрын
Just read your comments and thought in tornado areas they have storm cellars...wonder if they could make a safe space that someone could get to in the apartment, even as collapsing? Maybe could save...
@seldoon_nemar3 жыл бұрын
9:41 To my untrained eye, I read those flashes as electrical being severed. all that ac on the roof must have drawn some serious power. I was assuming 3 phase supply and if you suddenly sever it, it will cause a hell of an arc flash, which is basically a grenade going off, only spewing actual plasma around instead of shrapnel edit 20:36 there are about a dozen ac units on that little roof right above the flashes, and you can actually see cabling snaking towards a punch trough over where those flashes were. even if the main feed was isolated to the standing structure, those compressors are all in lockstep and need to spin down, and they will keep that line energized until they do.
@al22073 жыл бұрын
agree very bright electrical flash
@cynvision3 жыл бұрын
Should have read further comments. I agree but didn't know how different high rise wiring would be vs. my home system.
@heydude230013 жыл бұрын
Those definitely look like arc flashes. Way brighter than normal lighting.
@tomswiftTTT3 жыл бұрын
If the bright flash of an arc was present at the beginning of the video, this would most likely be the event that triggered the security camera.
@richardswenson44633 жыл бұрын
I agree with you on those bright flashes. I am not a professional electrician but have worked with home electrical for many years. And I have also seen what high voltage shorts look like. And yes it is something like plasma being thrown when copper melts from high voltage!!
@2DXYSU3 жыл бұрын
As an architect I would never design a structure like this. I would have a continuous foundation wall at the perimeter of the building. Any additional underground parking outside the building footprint needs to be structurally independent. One reinforced opening in the foundation wall would allow traffic between the two parking areas. Your previous video shows that the slab under planters abutting the building failed first, collapsing the pool deck. This then weakened the adjacent columns which also supported the building so it collapsed 10 minute later. All this also likely negates the theory that the foundation 8 feet below failed because of sea water intrusion.
@hueythegod24933 жыл бұрын
I’m no architect but you explained that we’ll enough for me to understand…sounds like common sense but common sense isn’t so common..even among architects
@tubester45673 жыл бұрын
I dont think so. Even with the pool deck collapsed, those columns should be able to hold up the building. Even if a few columns failed, most of the building should still stand. I think its more likely bad workmanship and cost cutting, maybe a lack of rebar and/or bad mix of concrete. There have been other building collapses where they used less rebar to save money. If I was the city I would be looking at any other buildings erected by the same contractor.
@Graham_Wideman3 жыл бұрын
I have not seen anyone arguing that the foundation per se failed. The salt-water-related theory that I thought was persuasive was that salt water was chronically washing into the based of pillars in the parking garage, which were shown to have spalled. This would progressively rust the vertical rebars, and importantly, also the stirrup "circumferential" rebar. At some point, the most-damaged column's concrete, no longer "corsetted" by the stirrups, would have crushed, allowing load to transfer across the slabs to adjacent columns (precipitating falling chunks of slab and also removing support to one portion of the adjacent deck). This is of course speculation, but seems pretty plausible.
@Graham_Wideman3 жыл бұрын
... a few minutes later... OK, I see that Josh is going to talk about the foundations in the next video... so maybe there is some discussion about that.
@msgstar49333 жыл бұрын
Stick to coloring in. Quantity surveyors do all the real work
@andydelle45093 жыл бұрын
Those flashes on the left may have been caused by power feeders breaking and shorting out as the floor collapsed. The reason they would quickly go out during the collapse is the main breakers in the basement or utility room tripping off. Just speculation but the blue in that light is indicative of electrical arcing.
@georgerodriguez59013 жыл бұрын
This is the BEST explanation ever made about this. no speculation, only facts. Thank you so much!
@dougc1903 жыл бұрын
I want to thank you for having such a professional channel. I've watched a couple other guys talk about this incident and you are hands down the best.
@TDMSmith513 жыл бұрын
Another thing that supports the lower levels collapsing first is that even though the penthouse and 12th level have dropped 30+ feet, there is no compression in the height of 12th and PH levels.
@wynnsimpson3 жыл бұрын
Excellent observation!
@Fix_It_Again_Tony3 жыл бұрын
I was waiting for him to point this out.
@wolfie10273 жыл бұрын
We're there survivors there then?
@lianalonge19843 жыл бұрын
I know many may have said this but this devastation reminds me of the collapse of the Sampoong Department Store in ‘95. I was 25 at the time and my heart sunk then as it does now for those poor people. Thank you for one of the most informative videos (2 in my opinion so far).
@chdreturns3 жыл бұрын
Reminds me more of the Hotel New World in 86 as all the evidence so far is pointing to a similar cause... I wasn't even born then but that was one of tge disasters that got me into being an amateur disaster historian (someone who studies and tries to dissect disasters)
@UberArchangel3 жыл бұрын
A couple things about the lights. All LED lights in the US have a capacitor in them. So you have the drain of the capacitor. On top of that as certain things are crushed the capacitance of other things as they are being crushed will be pulled by those lights in something known as flyback voltage. So this is likely why they are still lit and why they are so bright. Also wires will stretch some before they break so there will be a delay from that as well on top of conduit protection.
@ColourMeHarpy3 жыл бұрын
Some of the best analysis and explanation on KZbin. Excellent video as always, thanks!
@kimberlyperrotis89623 жыл бұрын
Yours is the only analysis of this collapse I’m watching, I just haven’t seen anyone else so highly qualified and experienced, but every Joe is making a video about it.
@chrisplummer9233 жыл бұрын
kzbin.info/www/bejne/hnazqnhonZuDas0
@AtlantaTerry3 жыл бұрын
Josh, I have been binge-watching many of your videos. Many times you use the phrase, "if you can see my cursor". No. It *is* difficult to see your cursor, so you are right. And I'm watching on a 50 inch Sony Smart TV. May I suggest you go into your system settings and set the size of your cursor to a larger one if not the largest. Terry Thomas PC Tech Support Atlanta, Georgia
@deeanna84483 жыл бұрын
I have watched more engineering videos in the past 3 days than in the entire first 45 years of my life! I never heard 😘the term "spalling" until this week. Thank you for the great information!
@myplaylist70073 жыл бұрын
From the looks of it when the pool deck fell it also took the building supports with it.
@JCrook10283 жыл бұрын
Pool deck fell 7 minutes before the columns.
@myplaylist70073 жыл бұрын
@@JCrook1028 :O
@JS-oy6nn3 жыл бұрын
Josh, I have watched every video of this series and just watched to applaud 👏🏻 how you come at this with such professionalism. Everything you say is well thought out with common sense and facts. Excellent job 👍🏻
@carlwilliams69773 жыл бұрын
I'm not an engineer, but I've built commercial buildings for 30 years. Given the total collapse of the building, there is NO WAY the problem started at the top. For whatever reason, this building was deficient at the base! The issue with the 9/11Twin Towers didn't start at the base, but had several (as I recall, in one case it was 13, and more in the other tower) stories pancaking under inertia! For the total destruction in this case, it had to start at the bottom! When I heard about this collapse I thought Hmmmm, that's interesting. When I saw the video I thought... holy s***! I've seen planned demolitions that haven't gone that well! And don't start with the conspiracies theories!
@tommyg29663 жыл бұрын
Agreed ... A column snapped and the spandrels dropped snapping the post tension tendons ... When the bowstrings broke the building came down
@Brucev73 жыл бұрын
*Here's Cause Of Miami Condo Collapse Champlain Condo Towers, Surfside* kzbin.info/www/bejne/hnazqnhonZuDas0
@patriciaeddy76293 жыл бұрын
Buildings like these towers were built to withstand this much damage without complete failure. No way was the roof job a trigger to the collapse. It had to be there in the bottom ,inside the columns from too often assault and inundation of saltwater from inside and or ground level giving way by sifting sands beneath the towers or both at the same time happening, spanning many years. Perhaps,there was not enough waterproofing done to concrete walls,floors and columns when needed. Waterproofing even stone is very beneficial to inhibit moisture damage.
@TheArayray3 жыл бұрын
You can say that all day- but the fact is clear- that inner penthouse parapet portion is completely missing and I never noticed that after watching this a hundred times. Went back to google maps to see and yes- it’s totally flush with this remaining parapet wall and should be visible. Would be nice to compare the time stamp of this video with the next door hotel guest video of the parking garage. If they coincide it wouldn’t surprise. Where it started, roof or base, but that wall is clearly missing. Something happened up there as well as in the garage.
@patriciaeddy76293 жыл бұрын
@@TheArayray Interesting. Knew nothing if that before your mention.
@TheBandit76133 жыл бұрын
I think it happened at the pool deck. Eyewitnesses said the pool deck was the first to go. She called it a crater. It dragged the rest down with it.
@seldoon_nemar3 жыл бұрын
watch his other video, he shows a video taken before the collapse and you can clearly see debris on the floor in the basement, so. as the pool deck was above that, that would make sense
@yannisaking3 жыл бұрын
I think the same!
@CaptainCaveman11703 жыл бұрын
No question. About a 7 minute gap before the tower gave up holding itself together without its columns. This type of interconnected design should be illegal imo, and should have been then too! A poorly maintained pool deck is a terrible thing yes, but it should only result in a collapsed pool deck, even in the very worst case! The pool deck should have had its own support system period.
@austinh10283 жыл бұрын
extra weight of the retrofitted penthouse, combined with poor maintenance and lack of inspections/followup, combined with water intrusion at the base?
@TheBandit76133 жыл бұрын
@@CaptainCaveman1170 Yes, the pool deck should have no connection to the main building.
@newzealandfortrump3 жыл бұрын
Yes non professional social media commentary is rampant and annoying at the least … but also inevitable as a result of the modern ability for ‘everyone’ to ‘know’ so much. But the positive may be that the ‘professionals’ are exposed to account for the failures that occur. In the past I suspect there were many coverups depriving the people, just because they had no ‘actual’ knowledge, of what had just happened. This video by ‘Building Integrity’ is very valuable to providing the non professional public with peace of mind that honest construction type engineers will carry out a true and valuable analysis of what probably occurred so that these mistakes can be avoided in the future. Ie they are the equivalent of the NTSB in the travel industry.
@deadbzeus3 жыл бұрын
If this was the way we analyzed all problems and searched for solutions the world would be a much better place. You have a gift to teach and explain, keep up the great work.
@steel57913 жыл бұрын
Your analysis makes a perfect case for 'Believe your eyes and not your assumptions'. Great job!
@leeboriack80543 жыл бұрын
Well said.
@richardswenson44633 жыл бұрын
I have from the beginning said that those blue lights, flashes was electrical. Consider how much voltage is needed to run thoseA/C units, and then how much for each condo. There’s minimal 240 volts running there. Maybe even 440. All these people who say it was a explosion from dynamite has never seen high voltage short out. Once you do, you won’t forget it. Very impressive to see, and scary! And there is more than just one bundle of high electrical lines running up those walls. Couldn’t imagine three or four of those runs being ripped apart and shorting out! Imagine two sets of 220 being shorted out together!! That would be 440 volts there! Then imagine multiple lines like that all shorting out together!! That would be very loud and bright! Would even sound like explosives going off! I have witnessed something similar to this before.
@cynvision3 жыл бұрын
Close enough and it will blind you. Lighting inside a condo. Might explain how the fires started nicely.
@richardswenson44633 жыл бұрын
@@cynvision wouldn’t surprise me one bit if the electrical did start the fire. Each condo probably had 220 in it. Which would make some nice lighting and fires!
@chemech3 жыл бұрын
As someone who has seen both electrical arcs and dynamite explosions, this was pretty obviously a case of arcing from damaged electrical conductors.
@3beltwesty3 жыл бұрын
The electrical plans show the building is wired 120 volts Y 208 volts . Ie 120 volts for lightning and 208 line to line for ranges water heaters and ac units
@robert207703 жыл бұрын
If you look at the blueprints (www.townofsurfsidefl.gov/docs/default-source/default-document-library/town-clerk-documents/champlain-towers-south-public-records/8777-collins-ave-1979-plans.pdf?sfvrsn=bd2a1194_3) Page 83 shows the electrical riser, item number 6 is a 3000 Amp 120/208 Volt 3 phase switch, that feeds item 8, a 3000 Amp 120/208 Volt 3 phase buss duct. That runs vertically up the building and feeds electric meter rooms on floors 2,3,5,7,9 and 11. Each apartment is feed from it's own meter. You can look at the plans for each unit, in the pages before this. For example, on page 81 is the plan for the "A" apartment units. Under the floor plan, the table labeled "PANEL A" is the circuit breaker box configuration for the unit, which is a 125 Amp 120/208 Volt panel. No 480 Volts in this building, just 120/208 Volts.
@williambunting8033 жыл бұрын
Good on you guys for picking this up. Hopefully the original video with the previous 10 minutes will emerge. Then we will have a more complete understanding. Though all of the issues raised through the full series of discussions are part of this event. You did register interest as to why the repair work started with the roof. One of the things I can see with the roof is that the water proofing seems to end cleanly at the base of the parapet ie doesn’t rise a distance to keep water away from the upstand junction a reliable location for concrete cracking.
@robertbryce12713 жыл бұрын
Kopp
@pegsgripsandgrins3 жыл бұрын
I love how you explain things, thank you for being so objective in your approach in trying to help us understand the complexities of this tragic incident. You are a modern day Colombo unpicking the evidence. ‘Just one more thing’
@fireballxl-57483 жыл бұрын
Thank you Building Integrity - well presented, fact filled and honest, logical, analysis.
@donniseltzer77183 жыл бұрын
I was one of the people who thought the Roof collapsed first but after the garage video and multiple witnesses saying the Pool Deck collapsed first, now I'm pretty sure that was the case. It was a punching shear failure of the slabs of the pool deck that destabilized the columns of the building
@dustyflair3 жыл бұрын
that and I think years of water percolating under that area and the whole building certainly helped cause it.
@dreamersruleNOW3 жыл бұрын
How do you know something from the roof didn’t cause the pool deck to collapse
@dustyflair3 жыл бұрын
@@dreamersruleNOW the roof was a long way from the pool deck and how would they have gotten all that weight to the roof? Thru the elevators? You people dont think very much.
@dreamersruleNOW3 жыл бұрын
@@dustyflair well if it’s explosives? The inspector was up on the roof 14hours before collapse. He says 3others were there too . I’m not saying I know either way. A leak on a lower level pulling down whole building is pretty odd. If a lower deck dropped down, building would not come straight down
@dustyflair3 жыл бұрын
@@dreamersruleNOW explosives? HOLY CLOWNVILLE!!!! Lady, the building was falling apart for the last 20 years. It is on the OCEAN FRONT> Seasalt will expose ANY WEAKNESS OVER TIME. If the lower levels give way what do you think will happen to the upper levels capt obvious? They will float in the air?
@kennethburchett63933 жыл бұрын
If they were replacing that roof? It would be done in sections! (As chopped up) as this roof is. Knowing south Florida commercial roofing? It would be finished with gravel… so the first steps would be removal of gravel then hot tar a celotex insulation board down! Then bring up onto the roof the felt paper.. I see no rolls of paper on the rubble pile… this along with the other points you’ve mentioned lead me away from anything roof related.. great stuff sir. Appreciate your videos.
@anthonyklein29443 жыл бұрын
The green thing covering the roofing materials is a "Bagster" from someone like waste management. I think the flashes are electrical arcs, possibly as higher current carrying conductors are severed, such as those serving the elevators perhaps, or even feeders to the upper floors which would be consistent with the lights going out instantly after the flashes.
@michaelcrossley56613 жыл бұрын
I think you're probably right. The elevator was right there.
@jamminwrenches8603 жыл бұрын
Yes and the flashes are what triggered the video to save. Mine are motion activated also and have had similar experiences.
@bretwalley46733 жыл бұрын
@@jamminwrenches860 in the garage there was leaking water, most likely from the fire sprinkler pipes, once water starts to flow, it will trigger the fire alarm, those are strobes, you could still see them flashing after the building collapsed.
@MeriLizzie3 жыл бұрын
@@bretwalley4673 if the fire alarms did go off, why didn’t people leave? There was roughly 7 minutes between the pipe break in the garage & the total collapse?
@bretwalley46733 жыл бұрын
@@MeriLizzie 1 am people don't move so fast, many people don't even wake up because of alarms, especially if they have had false alarms in the past.
@atlantacabil3 жыл бұрын
I've watched a couple of your videos and noticed that you provide alot of good information. No matter how good your information is you're always going to have people try to discredit what ur saying eventhough they're not expects in engineering. Great work!
@randomizer16663 жыл бұрын
I worked with explosives in the military for years, your instincts are right.. What we're seeing is the last frame of video before the electricity fully went out, if that were explosive flashes it wouldn't look like that, and you would see residual fires caused by carpet, and wallpaper burning for another frame or two before they are blown out by either the pressure wave, or debris.. It is one of the reasons that demolition teams remove everything flammable from a building before imploding it, explosive devices will start fires..
@mystryfine34813 жыл бұрын
Careful, well demonstrated analysis.
@onlinecall52843 жыл бұрын
Yes, except it was all just talk. In the ORIGINAL video, witnesses say they heard a bomb and there was the unmistakable flash or termite detonation around the fifth floor. This is not conclusive but the original video needs analysis. Otherwise, we can pour on the tech jargon all day and go nowhere.
@AnnaMorris4113 жыл бұрын
@@onlinecall5284 Unless Josh Porter is also a Qanon theorist, you’ll have to go elsewhere to spread that propaganda! Why don’t you believe in applied science?
@davewilson72553 жыл бұрын
@@onlinecall5284 People hear fireworks and think someone is shooting a gun. If you've never been around a controlled demolition then you don't know what you are talking about and neither do the people who think they heard a bomb. They are in shock from witnessing such an event. Apply science and math to this disaster and you'll see this isn't another conspiracy. The building was neglected as is shown by the pictures of the garage and the engineering reports. The reality is that the homeowners did not want to pay the hefty assessment to fix the property, so the damage continued underneath the concrete where the rebar is located.
@mymia10273 жыл бұрын
I’m very surprised that in this day and age this is the only video available of the collapse.
@envisionelectronics3 жыл бұрын
It’s likely the only PUBLICLY available video. There are likely others with great detail of people’s last moments of life. Those should not be made public.
@gorak90003 жыл бұрын
This is clearly someone videoing the monitor of a security camera system with a cell phone. You can see the edge of the monitor, and the edge of the window of the software on the left side of this video. Even the original video, from the security system would be much higher resolution, and not be chopped off at the beginning. I'm sure the forensic investigators have the original video, but it's not being made public.
@nobodyknows31803 жыл бұрын
Not to detract from Building Integrity, but this one is also reasonably informative kzbin.info/www/bejne/hnazqnhonZuDas0
@gorak90003 жыл бұрын
@@nobodyknows3180 Yeah, I've watched that one too. It's also good, not quite as detailed analysis as this video. I'm sure he did the analysis, but he didn't work through it in the same way Building Integrity did in this video.
@Ace21kg3 жыл бұрын
@@gorak9000 correct, this is a security worker recording the video off a monitor. I wouldn’t be surprised if the original higher res video is released in the future.
@aboyd19883 жыл бұрын
You can also see a few of those flashes prior to the third portion collapsing in various areas of the building surrounding the collapsed areas. These look like electrical flashes to me. Very quick, bright, white light.
@gorak90003 жыл бұрын
Yes, I think the same thing. The blue color, and that they're coordinated in multiple locations would pint to electrical arcs to me. Also, if you play the video frame by frame, the lower of the bright flashes goes out at the same time as one of the lights in the condo up and to the right of the flash goes out. The top bright flash goes out corresponding to a light going out in another apartment that's close to ground level in the section that's collapsing a few frames later, and the remaining lights both in the section that was still standing, and the part that's collapsing, go out a few frames later still. This would be consistent with 3 phase power, and each phase faulting one after the other.
@colin-nekritz3 жыл бұрын
Agreed. They look electric and not pyrotechnic in nature
@linanicolia13633 жыл бұрын
DEW. Very popular these days.......( direct energy weapons ). The UN is very familiar with them.
@aboyd19883 жыл бұрын
Eh, I think the evidence in this case shows overwhelmingly that this is a case of imperfect humans making numerous errors rather than Dr. Evil executing his plan to destroy a beachfront condo.
@gorak90003 жыл бұрын
@@linanicolia1363 "DEW. Very popular these days" - oh great, the Jewish Space Laser crew has arrived! Just who we need to hear from. Don't you have a flat earth theory to be defending or something?
@Russv23 жыл бұрын
Thank you for doing what you're doing!!!!!! You are offering a lot more insight and careful explanation than the media and a lot of KZbinrs out there covering this. Like many I have been watching the events surrounding this collapse and trying to make sense of it all. You seem to have a lot more knowledge and common sense when analyzing the information that's out there and I appreciate that. Those that are out there saying "I have the answer" but aren't looking at more than a collapsed building and little or no background in the field aggravate me and are not helping the situation. Keep up the good work!
@HB-tc9bi3 жыл бұрын
24:12 It absolutely began at the pool deck/garage area.. you can see how the entire pile of debris is leaning to the left, and sloping down towards that area.
@Redthumb453 жыл бұрын
From earlier videos I have watched, I was surprised that there was no expansion joint between the pool deck area and the tower.
@29alpinestar3 жыл бұрын
Need to talk about the penthouse being added later, I know they had engineers, but that building wasn't designed or engineered for a penthouse
@cayrick3 жыл бұрын
As mentioned before, certainly the penthouse added significant weight to the roof but the structure stood for decades after the penthouse was constructed. It might have been a minor contributing factor. Someone also make a comment like suppose someone came back from the bar at 1:30 and whacked a column while trying to park their car.
@mathewrussell15333 жыл бұрын
The North building they did that also. But its clear also that the specific building was poorly maintained. If you look at google earth and street view at both buildings you see the north building in pre makeover condition still looking 100 times better than the south building did at the same time. Even things like AC placement on the north building in better as they focus the weight on the building core where as the south building all the AC units are to the edge of the building. the roof is rot to hell. All round its just a mess and $$$ is more than likely to blame over everything else.
@truckerkevthepaidtourist3 жыл бұрын
The bottom line was having no columns to hold up the structure. Had it been built with the columns it probably would not have collapsed the way it did
@johnbrowneyes75343 жыл бұрын
I think the thinner garage columns is to allow for more parking spaces underground.
@truckerkevthepaidtourist3 жыл бұрын
@@johnbrowneyes7534 greed at time of construction
@lagautmd3 жыл бұрын
I keep wondering where other videos are. While it's possible this is the only camera that had the collapse in view, there are a lot of other buildings that could have security cameras that might have pointed at the building. Video cameras are near saturating our streets at this point. I feel we are likely to see at least one more video of the collapse from another angle.
@debbielockhart77623 жыл бұрын
Pretty sure we'd have already seen it if there were.
@tedbell44163 жыл бұрын
I don't think it's the only video either
@cynvision3 жыл бұрын
I think Surfside police has whatever they can get their hands on. There is one KZbinr that points out they had their own cameras. So the city thinks we don't need to see any up close footage of the deaths.
@waitaminute20153 жыл бұрын
This is treated as a crime scene, so I'm thinking any other video is in officials hands and won't be released until they know everything . I don't think it's a matter of hiding something.
@gorak90003 жыл бұрын
Even the video that's released is someone recording the screen of the security system from the building next door with a phone. You can see the edge of the window with a blue border on the left side and top left side of the footage that's available. Would be nice if they released the original footage from that security system, without the beginning missing, and in higher resolution not being a screen recorded with a phone.
@princejesterful3 жыл бұрын
Fantastic forensic analysis work! Really looking forward to the next video.
@maeverobertson11083 жыл бұрын
Like some of the other folks here, I've found your logical, knowledgable, and cautious explanations vastly more convincing than some of the others I have tried. (Not including the whackos, who I turned off immediately.) You are an awesome teacher. I wish I'd had teachers like you.
@Steve0071243 жыл бұрын
Thank you for taking the time to make these videos. I am not an engineer, and not sure why I am so fascinated by this tragedy, but you are helping shed light on the "why".
@JRLittleArt3 жыл бұрын
Pretty sure the roof was scheduled first because hurricane season was approaching and it was likely the cheapest of the repairs needed.
@thomas.19953 жыл бұрын
Many times to fast track a project work will begin on areas that have approval from the building department which may be the case here
@berenscott89993 жыл бұрын
They probably felt that the pool deck wasn't a priority. People who ignore history. So many parking deck collapse examples.
@CaptainCaveman11703 жыл бұрын
@@berenscott8999 In fairness, 90% of the damage to the pool deck was probably being concealed by the same pavers that were probably causing it. I am a USC-graduated Architect and only now am I learning that by the time you see cracks in the underside of the slab, the other side is in extremely dire need of emergency repairs. Yes, I knew it was a big problem to see cracks in a slab but not a 90%/10% problem as many forensic engineers are teaching all of us on KZbin. I actually hope this leads to many saved lives and I see lots of work for retrofit engineers/contractors moving forward. So I can ALMOST forgive the HOA for not understanding the urgency and especially for not understanding the bad design that connected the fate of the pool deck to that of half the residents, but I don't forgive them for adding those heavy pavers, palm tree pots and extra planters without re-analyzing and re-engineering the garage columns!
@CaptainCaveman11703 жыл бұрын
I agree, there are numerous reasons to schedule things that way.
@berenscott89993 жыл бұрын
@@CaptainCaveman1170 But if you take a look around the world, generally parking decks aren't treated the same as any other structure. There is often a lot of neglect that comes with them. "It's just a parking lot". I mean, you can find plenty of parking decks that have collapsed. They are exposed to the elements on pretty much all sides. Because it's a parking deck, it didn't get the same treatment as the rest of the building. They definitely wanted those columns in the parking area a lot weaker then the actual tower. And really, what's common in Australia, is that parking areas need to be disconnected from building structures, or treated the same as a building structure. And you get super wide columns here in Australia, like they don't screw around here. Those punching shear columns are crazy. And the way they double layered the paving. Wow, extra load.
@jeanetteshawredden56433 жыл бұрын
I heard 1 engineer yesterday say that he has looked at building plans vs post collapse photos and said it appears that the building may have lacked the amount of steel and/or rebar that was specified in the building plans. He said it is possible the builder did not follow the specifications in the plans.
@karlschauff79893 жыл бұрын
Not surprising since these buildings were built during a time when building codes were being relaxed and there was a lot of corruption going on. Lots of drug money and criminal organizations pumping money into construction in Miami.
@DavidJohnson-tv2nn3 жыл бұрын
@ 23:57 Look at the piddly amount of rebar tying the floor into column 72!
@johnhuber3543 жыл бұрын
All These Innocent Lives Lost Over Greed.
@dinaboop3 жыл бұрын
I read the assessment from an engineer or something from 2018 that said the original design included slopes to allow water to drain, and he thought it was a huge flaw that it had been built FLAT, thus allowing standing water. He also mentioned in the report that it would be super expensive to fix and disrupt the tenants.
@Courtney-pe2iw3 жыл бұрын
How can he tell when it was is collapsed and damaged and went flying off everywhere?
@laughoutloud23343 жыл бұрын
I’ll now stop watching the so called news on tv…..you’ve explained this tragedy better than ANYONE,! Looking forward to many more! New Sub! Thank you….
@AyeCarumba2213 жыл бұрын
Don’t be a nincompoop and politicize Josh’s presentation with your news-bashing. Only an idiot would expect news tv to have this degree of in-depth coverage.
@laughoutloud23343 жыл бұрын
@@AyeCarumba221 So I’m an idiot? What the hell is the matter with you….? I’m an ER nurse in a major hospital, I’ve been on duty some days 36 hours helping save Covid patients from dying..I’ve missed my own families major events to be at the hospital….thank God it’s now calmed down enough to where I can actually WATCH any news! Or anything for that matter…I am FAR from an idiot, and your remark only proves who the real idiot is…I can assure you if I were to see you in my ER, under horrific circumstances, you would get my utmost University educated care…with respect and care! I’m neither an idiot or stupid as you assume…I have a feeling you are just that. Have a good day..you need one.
@karlbrundage74723 жыл бұрын
@@AyeCarumba221 Politicize? How? The news media have reported misinformation and innuendo. That's a fact. How are facts political?
@LordSoySauce3 жыл бұрын
I’m not sure why people are confused about the title. It’s a hypothetical question and it makes perfect sense stated in the subject. This lets the viewer know what theory will be analyzed in the video. It’s an A++ for me, Josh. Your presentation is on point!
@BuildingIntegrity3 жыл бұрын
I think the problem is that there are so many KZbinrs and news stories that use a question in the title to imply their belief... or to make a veiled accusation. For example, "Did Jane Doe murder her whole family?" They aren't sincere in asking their question, they just want to start the story off by implying blame. You understood our intent, which was to genuinely question this theory of the roof failing first that other have proffered and see if it hold water. I will think about future wording used on the thumbnail for future videos to hopefully avoid confusion. Thanks for watching!!!
@Jack-bs7cy3 жыл бұрын
I have done maintenance in these types of buildings. The owners hated paying for maintenance and we were always understaffed. And hired the cheapest staff.(didn't speak english).
@devonteforeman3 жыл бұрын
23:58 you can see several condensing units as well. This would also support the roof following the rest of the building down.
@THX..11383 жыл бұрын
I think the 2 bright lights are electrical lines arcing out. They are not just brighter they are shifted to the blue end of the spectrum just like you'd expect from an electrical arc. Our seeing them in a still frame gives the illusion they are a continuous light source, but in reality were probably a flash that lasted just a fraction of a second, may have even been what triggered the camera to record. As far if the collapse started at the top or bottom, the video of the expanding dust cloud shows you everything you need to know. When the first section falls there is a dust cloud created by the air being forced out of the floors as they collapse. If the building collapsed from the top down the dust cloud would have started at the top and been the whole height of the building with the dust from the top floors being furthest from the building when lowest floors finally collapsed. However that's not what happened. The dust cloud comes pretty much entirely from the bottom and it's velocity increases exponentially as floor after floor hits the ground and the floor's air is forced out at ground level adding to and accelerating the dust forced out by the lower floors that have already been crushed. In the final frame before the last section falls the air is so clear towards the top floors you can even see the sky and clouds on the horizon because dust is blowing out from the base of the building.
@airtech96293 жыл бұрын
You are right, but some people turn the lights also because the building was making noise
@Re-engineer_everything3 жыл бұрын
When you spoke of the power for the lights lasting a few frames would make sense. Breakers are thermal overloads and are rated by their speed. So it would take some time to reach the breakers or pull out of the connection at the other end or lose the power to the light. Plus it the light was a LED it takes some time to use the power still left in the light.
@DashPar3 жыл бұрын
These videos are so good, educational, and helpful. We need to understand the causes so this never happens again! Excellent info Josh! Thanks!!
@airplane8003 жыл бұрын
I've been studying and teaching aviation accidents for many years. For every accidents there is always a story which reveals deficiencies in the system. Greed may be involved in many accidents. There are always the stupid people behind accidents. Many are in high positions and all they care is about their ego and paycheck.
@windsofmarchjourneyperrytr28233 жыл бұрын
And of course, just as many issues with the car you drove over there... :) Unsafe at Any Speed by Ralph Nader, continues today in Still Unsafe at Any Speed by Brian Chase...
@cywestbrook74483 жыл бұрын
Another explanation for the lights is that modern LED lights use an AC to DC power supply circuit that contains a capacitor that will hold some charge and keep the light lit for a little less than a a second even after power is cut. This, combined with the reasoning in the video could explain why the lights were on so long. Additionally, I believe the reason why they are so bright is because the camera's exposure was actually really high - if we look at how bright the side of the building appeared, that could only have been the case with a very high exposure. Also, if the camera was motion triggered the exposure could have not yet stabilized to the nighttime lighting conditions during the first frame of the video.
@gorak90003 жыл бұрын
They look like electrical arcs, as cables are yanked out of breaker panels. The blue-ish color compared to all of the other lights supports that guess a well. The lower of the 2 bright flashes extinguishes on the same frame as the light going out in one of the other apartments in the section collapsing. The higher bright flash goes out at the same time as a light much further down the building going out, and then the remaining lights go out a few frames later. That would correspond to the 3 phases of the power faulting in succession, and protection equipment kicking in and disconnecting those phases as they fault (short). I'm pretty sure those are large power distribution cables getting yanked out of connections.
@DaveC_TN3 жыл бұрын
The really bright, blueish lights you're speaking of look somewhat like arc-flashes. Could this have been caused by the high current lines being severed as the floors pulled away??
@danonymous39073 жыл бұрын
Thermite
@R00RAL3 жыл бұрын
Det cord .. go look up mine pit blasting. It’s so obvious it’s internal explosion. Det cord explodes in milliseconds just like a light flash. People inside wouldn’t have been able to differentiate the noise between that & the building collapse.
@ApolloVIIIYouAreGoForTLI3 жыл бұрын
yeah thats exactly what I thought
@DaveC_TN3 жыл бұрын
@@R00RAL I've used det cord before...Tried 'blasting' a 8" tree trunk by wrapping a couple turns around it. Just having some fun to see whether that would take the tree down. It. Did. Nothing. To. That. Tree. Didn't even scar the bark layer. Det cord could not bring that building down even if it were severely weakened.
@R00RAL3 жыл бұрын
@@DaveC_TN Did I say it was det cord that bought the building down ? Where does det cord go ? To a detonator, I’ve done exactly the same thing.. brought a tree down but used gel. a det is nothing.. you’ll need to pack explosives. C4.for a building. Simple gelignite to bring a tree down. Stick the det into the gel.
@dansw0rkshop3 жыл бұрын
17:21 Regarding motion sensing... really old security camera systems might start recording when the motion starts, but nowadays they have a "preroll" where the triggering of motion actually grabs a cache of the previous few seconds (my cheap DVR from local home improvement store does 10 seconds or so of preroll by default).
@nachtegaelw53893 жыл бұрын
Good to know, & that’s a really helpful feature for security cameras to have!
@windsofmarchjourneyperrytr28233 жыл бұрын
How can it record something before its supposed to record? A DVR is working from pre-recorded material. So it's recording all the time, then?
@dansw0rkshop3 жыл бұрын
@@windsofmarchjourneyperrytr2823 That's exactly right. It's constantly recording into a circular buffer. Think of a loop of video tape that instead of an endless playback loop, it's an endless recording loop. If something interesting happens, you just grab the whole loop, splice it in where you started recording at the triggering event.
@TheOriginalCFA19793 жыл бұрын
when you turn it on, it begins recording. It records however much it’s set to, and then once it’s reached this point each new frame overwrites the oldest frame. Should the camera trip, the new frames no longer overwrite the oldest, and are added to the end of the video, once the camera has reached the point where it’s ready to “turn off” (ie, no motion for a while), it will permanently save this complete video, including the parts before and after the camera triggered before resuming the prior mentioned overwrite the oldest frame. Essentially, it’s always recording it’s just overwriting the oldest data unless it’s tripped, and if it is tripped it then has the recording leading up to it being tripped. It’s not that different, really, from a store reusing tapes in an old style security system. Each tape holds 24 hours (or whatever the real number is, no idea on analogue systems) and if nothing happened during that 24 hours the tape will be reused (eventually) on a different day and only taken out of rotation and saved if/when something happens.
@josephkanowitz68752 жыл бұрын
@@windsofmarchjourneyperrytr2823 ב''ה, the buffer is necessary for the machine vision motion activation to operate anyway. Instead of a camcorder tied to an IR motion sensor triggering a switch, you have a computer saving and comparing a few camera frames in now very cheap RAM algorithmically determining if there has been enough motion to fully store a recording on regular "permanent" storage. No extra parts, electric consumption arguable. Since the motion occurred in the last few frames the rest of the buffer is available if you want the preroll feature, as also came and somewhat went ("too complicated") on consumer cameras once it became a no-cost option.
@FBHSswimmer20063 жыл бұрын
This may be crossing the speculation line. And I am by no means an Engineer. But when was the penthouse added to the building? Reason I am asking is you mentioned in your other videos that rusted rebar causes the steel to expand and bust out the concrete. How long would it take before that happened? Could the water that caused all of rust and concrete degradation come from rain water on the roof and found it’s way into the supports of the structure and eventually into the garage? Due to poor drainage and missed cracks in the roof once the penthouse was completed. If you look on Google Maps on the corner of Collins Ave and 88th Street straight up to the top of the building you’ll notice what looks like a busted off section of the stucco. If you move down 88th towards the garage ramp, the second column of balconies, the 9th floor balcony ceiling (or would be the 10th floor’s balcony floor) there is what looks to be exposed rebar sticking out the side. You’ll also notice more stucco missing from the 11th and 12 floor parapet.
@beehaven99493 жыл бұрын
Although they updated drawings on May 14, 1980 for a 13th floor, they did not apply for a permit to built it until August 1980 which was granted in Nov 1980 which was one year later after the 12th story building permit was granted. How far they get into the building after a year, (12th floor or not), is anybodies guess.
@FBHSswimmer20063 жыл бұрын
@@beehaven9949 Hmmm…interesting. I also did a comparison between Champlain North and South on Google Maps. The North building looked in better shape than the south, as if it was up kept better. East looked the best out of the 3 which isn’t surprising since it was built in 1995-ish.
@DJCAntisocial3 жыл бұрын
Its a pleasure sharing you're video's and info regareding this collaps and its intricacies, great work :)
@BuildingIntegrity3 жыл бұрын
Much appreciated!
@waitaminute20153 жыл бұрын
This explanation makes sense regarding the roof. I'm looking forward to the next video about the foundation, because all along I suspected this. Still all so horrible. There's no way to unsee this horror.
@edwardjackson14183 жыл бұрын
All people can do is move forward, and learn from this, and build another, bigger and better than before!
@thoso19733 жыл бұрын
I'm reminded of the Grenfell highrise fire in London 4 years ago that claimed so many lives. A poorly maintained building, inflammable cladding added to the facade, fire regulations broken and disastrously outdated fire protocols enacted by the fire service and police. The residents warned about obvious fire hazards for years, but no one responded to their warnings.
@joysoyo24163 жыл бұрын
It wasn't a fire
@missimoppet3 жыл бұрын
This happened around a week after the Grenfalls anniversary, and it reminded me of that too! Grenfall was done on Trumps Bday. I looked into that fire, and it was a sacrifice for sure.
@nataliesiddle85073 жыл бұрын
@@missimoppet none of us in the UK care about Trump or any of your other ex presidents, other than commenting on social media. Grenfell happened because a shoddy manufacturer pretended they had fire-proof. Landing and sold it to be used on hundreds of buildings across the country without any remorse, neatly folding their company in the inevitable aftermath. People are still fighting legal battles to have the same cladding removed from their residential buildings, and YES it’s still dragging on after 4 years because BUREAUCRACY 😕
@clydetdrake3 жыл бұрын
I find it interesting that one of the victims was a retired structural engineer. Seems that he would have noticed the cracking and other damage, and known it was serious? Somewhat surprised he didn't either raise hell about it, or move.
@blackhawks81H3 жыл бұрын
People do weird things to avoid losing their condo in paradise with an amazing view... Also, if he did know the building was in super rough shape, he wouldn't have necessarily known the whole thing would come down...there's a lot of buildings in bad shape out there. They almost never just straight up collapse. He also likely would have know that if he raised enough hell to make them decide to fix the building fast, that as a tenant he'd be getting probably a 50 thousand dollar assessment added to his bills. Buildings like this are very expensive to fix and the tenants end up paying for it. He may have thought it was bad, but not bad enough to drop on him. And like I said that 50k+ he would have known it would cost him could have gone a long way towards not saying much.
@lordofentropy3 жыл бұрын
Well and they had already started the process of making the 15 million dollars of repairs, that's what the roof work was the start of. So he probably was like "well the repairs are being started." And yeah, buildings don't usually just collapse here in the United States. Anywhere else in the world, sure I would expect it. Obviously between those things he figured it was under control.
@JT-lt5gr3 жыл бұрын
They had valet parking, so it's possible he never saw the underground parking garage. (Not sure if it was 100% mandatory valet parking or if some people valet parked and some people self parked.) Also, he may not have been very sociable with his neighbors, where he would have heard about damage in the garage and balconies.
@suzilight3 жыл бұрын
He may have noticed and WAS raising hell…we just don’t know. RIP.
@wcbibb3 жыл бұрын
The "Loose Change" video of building collapse! Great video!
@debrajean7433 жыл бұрын
Very interesting video Josh but oh so heartbreaking. TY for all the work you have been doing explaining to the shocked world what most likely happened.
@juliemunoz27623 жыл бұрын
Those “lights” you’re talking about, are arc flashes from the electrical supply being torn apart and shorting out as positive and neutral lines contact each other.
@dingdong21033 жыл бұрын
Yes it's obvious from the video that it's the electrical conduits arcing when they're severed.
@Darieee3 жыл бұрын
18:40 modern LED lights do also store some charge in their capacitors, varies from bulb to bulb but they will easily survive many video frames on their own also - very nice breakdowns, love them!
@charliejenkins80993 жыл бұрын
Notice that in the flashes there is a tad of green which is copper. Those flashes are from the severing of the electrical feeders which are fed from the core chases leading to the central power in the basement and should be visible in some of the site plans. They would run horizontally at each floor from the core chase. Those high dv/dt flashes are also a great motion trigger. The camera owner probably had excluded the tree branches from the video trigger zone and was attempting to trigger on motion closer to the ground at their property. The flashes in the background field of view would provide a very plausible trigger. Note that a bottom to top collapse could preserve power longer than a shear. In the next frame after the flash has extinguished the power to the rest of that floor is out. Power loss analysis might be a clue to the order of the collapse if the breakers held off long enough. Thanks for the great analysis.
@richardswenson44633 жыл бұрын
Finally someone who knows what he is talking about. I have stated something similar to what your saying earlier. I have from the time of collapsing of this place that those where electrical lines shorting out. And there is lot of voltage going through those floors. I am no electrician but have really good knowledge of how they work in buildings. I have done a bit of electrical work before. I have also seen what high voltage looks like when they short out or are being rip out. It is something you don’t forget.!!
@gorak90003 жыл бұрын
Yes, those are definitely arc flashes of the main feeder cables or bus bars going up the building. If you play the video frame by frame, each arc flash goes out on the same frame as other lights in the building. The lower arc flash goes out in the same frame as lights in a condo above and to the right of the flash. The top arc flash goes out in the same frame as a window in the section that's falling on the right side, and is almost at the ground when the light goes out. A few frames later, the remaining few lights in windows all go out at the same time. 3 phase power, 3 faults, one after the other in fairly quick succession. I don't think the security video was motion triggered. The video that's been released to the public was from someone recording the screen of the security system with a phone. Look at the left side of the video - you can see the edge of the monitor and the edge of the window of the software. The person recording it with the phone missed the first bit. The original video in the security system would contain the whole thing, and be higher resolution as it's not a recording of a screen with a phone. I'm sure someone has that video, but it's not being released to the public.
@charliejenkins80993 жыл бұрын
@@gorak9000 Good catch.
@johnhaller58513 жыл бұрын
I said it elsewhere, but to get that arc flash, voltage had to be higher than the voltage the wiring and raceways were rated to carry. Modern THHN wire is rated for 600V, but not the overcurrent caused by over voltage. A high voltage transformer in the basement getting crushed and shorting primary and secondary windings would provide that very high voltage to lower voltage circuits. Either 480V to 208V/120V or 11kV to 208V could do it. The distribution fuses from the utility certainly blew at some point, they sound like a small bomb going off when they blow. Even after the fuse blows, the vaporized copper from the wiring will not instantly cool, but should stop vaporizing.
@joephysics54693 жыл бұрын
I thought this was going to be another armature expert opinion. I was so wrong. This is very much like what will be presented in a court room. Very professional sir.
@Weather763 жыл бұрын
The roof has nothing to do with it. And in past videos, you can see where the debris first fell. Everything is clear from the last photo. 26:24 A monolithic slab over the parking lot collapsed and buckled. From the side of the fence, it is rigidly fixed, so the tension fell on those 3 columns from the previous videos. The columns were bent outward by this force and the front section collapsed, pulling the rest of the building. Part of the building has survived. The columns in the remaining part of the building are much thicker and there is a monolithic wall (lift shafts). Sorry for my English.
@prospectelectric22013 жыл бұрын
IS THERE A WAY TO MAKE YOUR CURSOR ARROW LARGER? so we can follow as you explain
@laughingcheetah3 жыл бұрын
Yes, and/or change it to a brighter color so it is easier to follow? Thanks for the informative videos!
@silviopina_1113 жыл бұрын
Ditto!
@MrEvpatoria3 жыл бұрын
You don't need to be an architect to see that this building had an awful design. Better maintenance could only delay the inevitable but not avoid it.
@michaelcrossley56613 жыл бұрын
I think that's why the city is looking into the North Tower again.
@lagoat43 жыл бұрын
@Just Looking San Diego will likely have a much different building design code given the seismic area it's in. The buildings will be of much higher strength, and are designed to stay up in an earthquake. Also. the soil conditions are very different than the east coast of Florida.
@nickymatthews24653 жыл бұрын
Watching the security video of the collapse, it seems clear that it started at ground level, not the roof.
@Orinfoo3 жыл бұрын
16:43 you didn’t watch the whole vid…..
@daveg21043 жыл бұрын
@@Orinfoo What? Did you understand what you watched? The top floors were intact (as far as we can tell) when the building was collapsing. They hadn't "pancaked", but had dropped in height, indicating that the collapse started at a lower level. Of course, we can only speculate on what we can see.
@johnlarsen83083 жыл бұрын
They interviewed the old facilities manager. He said they were always pumping water out from the foundation and parking garage. So did the water removal undermine the foundation and cause a collapse from below
@stanleyflory67023 жыл бұрын
From looking at the blueprints from 1979, one thing that screamed out at me was, the columns in the part of the building that did not collapse, were actually bigger than the one's in collapsed part! So, did this building all go up at once, or did it get built in sections? If the columns in the collapsed section were indeed smaller size, was this a cost cutting measure as the building was being built?
@MG-ot2yr3 жыл бұрын
I saw the same thing, the columns in the part that didn't collapse are about 20" x 20", but collapsed part most are 16" x 16"
@Graham_Wideman3 жыл бұрын
Josh: I see you're again using google's 3D model of the building, which is rather wobbly. You might look at bing map's photographic "bird's eye-view" which has 45-degree shots from all sides. Although it's a 45-degree view, you might be able to straighten up the perspective in photoshop.
@Bluuplanet3 жыл бұрын
I'm thinking the cumulative damage of water, spaling and rusted re-bar may have turned the building into a house of cards. Evidence is the extent that the building disintegrated as it collapsed rather than breaking into 6 or 8 large chunks.
@waitaminute20153 жыл бұрын
That's interesting. I'm just not sure what I'm looking at in the rubble because I would also think chunks would be larger also.
@CaptainCaveman11703 жыл бұрын
I apologize if you've covered it, but I think people aren't talking enough about the pavers that were placed on the pool deck. They appear to be sitting on a 3-4" thick mortar bed to me and as such surely added an outsized load to the already flimsy pool deck. Having been improperly waterproofed (presumably) they also might have served to conceal the damage that they themselves were causing to the slab and column joints underneath. I also would like your thoughts on the palm tree pots that are clearly not original, and additional planter boxes that I do not see on the original plans. I imagine that a palm tree pot that is constantly being rained on must weigh an incredible amount. I'm also interested if that kind of shear column connection is still even allowed as here in California almost every concrete column I see has some kind of capital or "flare-out" distributing the forces and preventing a punch-shear condition. Thanks, and this video was awesome btw.
@skliros92353 жыл бұрын
Great points. See this video. Near the end of shows the garage. Notice the water on floor and cracks on ceiling. kzbin.info/www/bejne/rWXVeIp-bMZ3gMU
@beehaven99493 жыл бұрын
I think the planters did crash through by the apt 111 and was the crashing wall that person heard before the deck dropped down. These 6 concrete planters had palm trees which were apparently removed before the collapse. However, I am curious how well they were drained or if they acted as fresh water reservoirs with hydrostatic pressure action infiltrating the pool deck slab.
@skliros92353 жыл бұрын
I'd like to know if there was any waterproofing installed under the pavers. Where would the water drain that got under the pavers? And who knows how wet and rusted the rebar got below the pavers, out of sight.
@CaptainCaveman11703 жыл бұрын
@@beehaven9949 I agree.
@CaptainCaveman11703 жыл бұрын
@@skliros9235 Well it appears from what many KZbinrs who work in this field say, since the damage had started to appear on the underside of the slab, and since water was filtering through, at least 90% of the slab damage would have been from above, likely concealed by the pavers in my opinion.
@tlrademaker3 жыл бұрын
Love your analysis. Keep it coming even on other building collapses. Great job to explain it in layman's terms. 👍
@ucangetme13 жыл бұрын
That security camera footage is taken of a screen with a phone camera... The original is out there and likely to be much better quality and have the seconds, and minutes before the collapse.