As a local retired architect the first press conference sounded and smelled all wrong. I read an indifferent hardness by the city leaders. I did not hear an ownership of responsibility to those voting citizen survivors. I instantly read this rush to demolition as a desire to hide the facts which they were and are intimately aware of. I think an investigation will uncover collusion of city with the building owner, fraud and even bribery. They were not listening to the many opportunities to read the buildings imminent collapse. My heart breaks for these low income residents who weren’t shown the respect and santicity of life they deserved. And it will be uncovered and made public

@alisonwilson9749

Жыл бұрын

One wonders if their response would have been different if the residents had been wealthy celebs....or city leaders' kids.

@virginiaviola5097

Жыл бұрын

This is Champlain Towers again. The rich and the poor are both the victims of unscrupulous building owners, corrupt councils, and work done the cheapest way possible by people not qualified to build a dog kennel. Seeing the clothes still hanging in the wardrobe up on the 4th Floor is really sobering. It speaks to the humanity of the people who are trusting victims of unscrupulous owners. RIP.

@virginiaviola5097

Жыл бұрын

@@alisonwilson9749 it would be the same. Champlain Towers being the case in point.

@TrixyTheWonderDog

Жыл бұрын

They definitely rushed order to demolish. They hadn't even cleared the building. Later that same day Ms. Lisa regained consciousness and was rescued. They next day they pulled animals out...they were going to demolish with living beings still inside. The slumlord wilfully ignored the warnings of professional inspectors and contractors and now people are dead.

@superpsyched7171

Жыл бұрын

The contractor who took the pics several days before didn't take the job because Andrew Wold wouldn't spend the extra 50,000 it would have taken to shore up the building prior to working on it. Now it's going to cost exponentially more and will never make it right as 3 people are dead, one person had her leg amputated on site, and 50 people are displaced.

Seeing those pictures made this civil engineer say "holy shit" out loud... How did the city inspector not order an evacuation of the building?

@timgerk3262

Жыл бұрын

Good question! I think you got a series of "authorities" who had no intuition for unreinforced structural masonry. That building style was used in ancient Rome (interior as well as exterior walls, of course, with wood beams). But, now a century has passed since we allowed/needed this style.

@Helladamnleet

Жыл бұрын

It's Iowa

@andrewtaylor940

Жыл бұрын

The Fire Department was called the night before. How did they not notice the bubbles in the outer wall. The rule I was always taught with regard to evaluating a building as a Fire Officer was "When in doubt always assume the outer walls are load bearing walls and treat any distortions in them with concern if not alarm".

@timgerk3262

Жыл бұрын

@@Helladamnleet the bland, complacent stereotype is confirmed.

@timothystevenhoward

Жыл бұрын

@@jennyk2022 I think we will find out nobody thought that the brick masonry wall carried the load. the building design is not typical. Which brings to mind all of the modifications over the years to the windows and openings. If it's a facade, asthetic decisions are no big deal. So maybe all kinds of mods to that area of the building were authorized by permit in the past without realizing that changing the holes in the wall and inspecting the wall periodically would be necessary. Think of it like suspension bridges with cables. You can't just take a scissors and start cutting cables on the bridge expecting the loads to shift without consequence.

you should watch the interview with the local authorities who claimed something to the effect of "i don't think anyone can tell when a building will collapse". I was screaming at the TV. Yes, its called engineering! You certainly can if you know what you're looking at!

@BuildingIntegrity

Жыл бұрын

For sure. Video 2 of this series will make that clear... hopefully.

@rogerwilco2

Жыл бұрын

The whole story smells of corruption.

@WindTurbineSyndrome

Жыл бұрын

Well it proves that just using our public officials to guarantee building safety is not a good idea. Many of them have been in the position a long time and are coasting to retirement.

@the51

Жыл бұрын

@@WindTurbineSyndromemore that people are greedy and can be bribed to ignore serious issues.

@wessltov

Жыл бұрын

I'm not sure anyone can tell exactly when. Of course, the question of "when" needs only be asked if the answer to "if" is a resounding YES

From an interview the warning contractor wanted to do the interior shoring work that the engineer had recommended that would have cost the building owner $50,000. The owner wanted him to drop that part out of the bid to save money. He refused.

@TheEDFLegacy

Жыл бұрын

That owner is about to get slapped with a massive lawsuit. And possible arrest.

@platedlizard

Жыл бұрын

@@TheEDFLegacy owner and contractor should absolutely be charged with negligent homicide.

@mhamma6560

Жыл бұрын

It all truly depends on what was conveyed. If it were an immediate need of concern, the building would have been vacated. It really comes back to the engineer if he was fully aware at all points. He has a duty to protect life and property and if the situation warranted, he would have expressed do it now or else. Contractors try to upsell, it's not secret, the engineer makes mandatory requirements however.

@wolphin732

Жыл бұрын

@@platedlizard this wasn't negligence... this was intentional cutting corners. And intentional ignoring of issues over the last while.

@martentrudeau6948

Жыл бұрын

@@mhamma6560 ~ That sounds about right, the engineer should have insisted on immediate safeguard action, telling the city of Davenport to revoke it's occupancy use if safeguards are not done.

made in 1906, i would not be surprized to find out that it's called "stack" because it was and actual 100'+ smokestack hooked to the boilers and generators. looks about the right size. probably got amputated and had the space reclaimed on all but the first floor where it was a utility space to begin with. Actually, that would make a ton of sense with servants quarters around it, since it would be sweltering around that thing year round to provide electricity and hot water. It's probably only internal because the building was built right to the property line. It's also located at the rear right where the boiler room would have been. they would have regular coal deliveries so having them as close to the outside of the building is ideal unless you are sub-grade, then there's other methods of layout 15:40 the connections would be riveted, not welded. welding was not a popular means of structural connection in 1906. It wouldn't be until post WW2 that it became trusted enough

@KathrynsWorldWildfireTracking

Жыл бұрын

Bingo. Smokestack. We have to remember how buildings were heated in 1909. Wasn't with electricity. Boilers in the basement.

@KathrynsWorldWildfireTracking

Жыл бұрын

@@oldskolacura9798 Doesn't seem like that was a good design in the first place either. 😞

@seldoon_nemar

Жыл бұрын

@@oldskolacura9798 for the most part stacks are independent because the wind load and expansion contraction make them unreliable. Notice it shoots the gap between the iron

@wilsjane

Жыл бұрын

This is a copy of my reply on another thread. Regarding whether complete demolition is required, would depend on whether the other three elevations of the building are fanned out beyond the steel structure in a similar way and if so, the integrity of everything. From reading some of the comments, I am wondering if a basement only exists below the collapsed area to house the boilers. It would explain a lot, since it is possible that building to full height above that area may have not been originally intended and only a single floor trade entrance and laundry room for the hotel considered. The alcove would have visually concealed a full height chimney stack. If my hypothesis is true, the stack would have had deeper footings, accounting for differential settlement to the rest of the building which resulted in the collapsed area of the west wall breaking away. A basement plan would partly answer the question. Taking the area to full height may have been part of the original build, but changed AFTER the original structural design. It certainly would not be the first time. These days, late addition of swimming pools is the major culprit. PS. My history is in the design and upkeep of major London theaters. Alterations to these buildings over the last 60 years have certainly caused some hair raising moments, particularly when circle seating areas that were unsupported across their entire front, were added, taken away, or moved. Fortunately leading structural engineers were always employed. In this case, subsequent demolition of the stack may hold the key to the weakening of the structure.

@bostonrailfan2427

Жыл бұрын

@@seldoon_nemarhe might be mistaking the stack for a chimney, IIRC chimneys are structural as the buildings are built around them and/or attached directly to them rather than occupying a space within them as the stack would be

The stack is probably a common chimney for the multiple coal fired boilers in the basement. You can see the bricked up coal chute door in the alley. (The smaller bricked up sections were basement windows.) The steel drum shown may be a repair liner because the old masonry liner was failing inside the stack. The difference on the north building is that the south end of that north building is hung from the south (collapsed) buildings northern most beam.

@johnengland8619

Жыл бұрын

Thanks for pointing that out. I thought it might be a garbage shoot

@atomopawn

Жыл бұрын

Stack = "Smoke Stack"?

@TyphoonVstrom

Жыл бұрын

I think you are correct. It would also make sense that the servant's quarters were built around this feature as well. Perhaps the retrofit more modern round structure was a boiler, tying into the old chimney for exhaust, and probably where all the old coal fired heating junctions were.

@uploadJ

Жыл бұрын

Good point. And the coal chute I recall seeing in old homes in Michigan long ago.

@Dallas_K

Жыл бұрын

It may even have been a furnace for burning garbage. That is something many old buildings did. Garbage was burned to reduce bulk and the ash and debris would periodically get hauled out for disposal.

Civil engineering was the career I wanted to pursue when I was a child, as I was fascinated by the architectural blueprints that my father used to bring home as part of his work in the building trade. My father always said that architects were the people that came up the vision for a building, while civil engineers were the people that made that vision happen. Watching your videos brings back all the memories of reading books about this, which is enormously satisfying as I actually ended up as a "software engineer" instead!

@abbylynn8872

Жыл бұрын

My first Love being an architect. Until I struggled with math which I loved. On my way to being a data engineer from BI.

@acgillespie

Жыл бұрын

I used to watch my daddy bring home beer n whiskey and when I grew up I wanted to be able to drink just as much as he did/could and let me tell you after lots and lots of practice I did in fact become just as good if not even a little better. yes sir. 65 and really have nothing to show for my life but man oh man could I put away that beer n whiskey just like daddy did - hope you enjoyed my story LOL

@percheroneclipse238

Жыл бұрын

Exactly my career path.

@Meganomaly3

Жыл бұрын

💲💲💲.

@acgillespie

Жыл бұрын

@@Meganomaly3 😯😀🤩

The fact that the cirty wanted to demolish the building one day after the collapse, with people still in the building, is absolutely insane.... Especially now that you've pointed out that the remainder of the building might be structurally sound.

@Dallas_K

Жыл бұрын

That screams to me that they wanted a cover-up.

@robertroy8803

Жыл бұрын

@@Dallas_K Yeah my immediate thought was they had an instinctive CYA moment. Much harder to blame incompetence all around when you can't investigate the area.

@ingvarhallstrom2306

Жыл бұрын

I doubt the rest of the building is structurally sound. It seems the entire building has been twisting and turning for several years to compensate for the shifting loads. I would suspect cracks all over the place even hidden under "sound" non bearing facade. Thrre's been numerous gas leaks and water leaks going on for years, who knows how many leaks has slowly been desolving that masonry in unseen places?

@rcpmac

Жыл бұрын

@@Dallas_K nonsense

@tomparker9966

Жыл бұрын

@@oldskolacura9798 I pretty impressed how quickly they have been able to demo it. I expected a mountain of debris but I haven't seen them haul anything away. Think how awful it is for the residents to have to leave everything you own behind especially old family photos, jewelry, personal papers. Things you can't replace.

Another thing that may be interesting: there is an extended video ("NEST camera footage shows minutes before Davenport building collapsed") that shows the previous few minutes, and the 'supports' that were added by the contractor were bowing slowly over time. It's almost imperceptible in realtime, but fairly obvious when you flip between the start of the video and immediately before the first piece of facade falling.

@BuildingIntegrity

Жыл бұрын

Yep

@PicardoFamily11

Жыл бұрын

I'm not any kind of structural engineer. But I wonder how anybody thought that those thin metal rods could provide any structural support at all.

@HenryLoenwind

Жыл бұрын

@@PicardoFamily11 They didn't. But the engineer's plans specified (heavy) supports, so they needed to put something there that to the casual observer looked like they followed those plans.

@stefanschneider3681

Жыл бұрын

@@PicardoFamily11 I'm assuming they were meant for the outer lining of bricks that should just "look good". Still very shady ...

@contra1124

Жыл бұрын

@@HenryLoenwind not even the most casual observers would think that. it was mentioned in the video that the supports (poorly designed as they are) were there to keep the rest of the facade from falling off the building while they do their structural hotfix

From what I've seen of you on this KZread channel, I've always been impressed with your character and the thoroughness of your work here. ✌🏾

@BuildingIntegrity

Жыл бұрын

Thank you. That means a lot!

@ccpperrett7522

Жыл бұрын

Agreed 💯 %

@wilsjane

Жыл бұрын

@@BuildingIntegrity Regarding whether complete demolition is required, would depend on whether the other three elevations of the building are fanned out beyond the steel structure in a similar way and if so, the integrity of everything. From reading some of the comments, I am wondering if a basement only exists below the collapsed area to house the boilers. It would explain a lot, since it is possible that building to full height above that area may have not been originally intended and only a single floor trade entrance and laundry room for the hotel considered. The alcove would have visually concealed a full height chimney stack. If my hypothesis is true, the stack would have had deeper footings, accounting for differential settlement to the rest of the building which resulted in the collapsed area of the west wall breaking away. A basement plan would partly answer the question. Taking the area to full height may have been part of the original build, but changed AFTER the original structural design. It certainly would not be the first time. These days, late addition of swimming pools is the major culprit. PS. My history is in the design and upkeep of major London theaters. Alterations to these buildings over the last 60 years have certainly caused some hair raising moments, particularly when circle seating areas that were unsupported across their entire front, were added, taken away, or moved. Fortunately leading structural engineers were always employed.

In Toronto Canada a lot of the older buildings are constructed this way. Thanks for showing how the loads and forces are distributed through the structure so we can look for early signs of possible failure.

@alexwyler4570

Жыл бұрын

make sure only union-qualified journeymen fix them. Hard work is not enough. Knowledge and technique matter.

@dennistucker9081

Жыл бұрын

Alex Wyler, I appreciate your comment, especially regarding the Union.

@matthewmosier8439

Жыл бұрын

@@alexwyler4570 I would point out that there are equally skilled people who choose not to be in unions. Especially with unions becoming excessively political, some skilled workers choose not to be a part of them.

@tomfeng5645

Жыл бұрын

@@matthewmosier8439 When it comes to highly technical labour like this, how else do you guarantee workmanship? There's no other licensing body afaik and word-of-mouth alone won't cut it since the general public don't have the skills to even know what's good work here or not.

@matthewmosier8439

Жыл бұрын

@@tomfeng5645 Independent groups. Basically, groups of contractors/ inspectors who's business is quality control. Freedom requires some degree of responsibility and people need to stop trusting regulatory bodies, unconditionally. As we can now see with the justice system in the U.S., blind trust in agencies invites corruption and politization.

I'm very confused as to why a building in this condition was not immediately evacuated. The contractor and building owner are clearly liable, but what on earth was building control doing?

@platedlizard

Жыл бұрын

One of many questions people have. We need a thorough investigation to find out what went wrong, from the building to the chain of authority

@pjaypender1009

Жыл бұрын

The person who okayed it has resigned. They claim it was a computer error and they didn't intend to okay it. I'm not saying this to defend them, just to let you know the city's claim.

@MichaelSmith-rn1qw

Жыл бұрын

I get the impression the contractor did not understand that portions of the west facade (the brick "columns") were load bearing. I wonder if the contractor even looked at the original design drawings?

@phoenixrising4532

Жыл бұрын

On the permit from the city the contractor is listed as "owner" for the last permit issued. So take that for what you will

@paulmea3166

Жыл бұрын

@@alexwyler4570 But the city didn't condemn it though..

So glad you’re covering this. 🙏🏻 I like how you explain things.

I used to do a lot of urban exploration and I wouldnt have set foot in an abandoned structure with a wall that looked like that. Even if it was just the façade. And I was a foolhardy youth at the time.

This building's issues had garnered a lot of interest several weeks before the collapse. The common question/remark was WTF?

@Ron4885

Жыл бұрын

Agree 👍

I think you're right about holding off on imploding the building: • Giving the less-damaged units a few days to evacuate will decrease actual losses (including irreplaceable items-which people like to pretend don't exist; getting a birth certificate replaced without an ID is EXTREMELY difficult) and therefore insurance claims as well as secondary fallout • Leaving it up a little longer gives engineers a chance to do some data gathering As for that construction method, we likely still have a shitload of those in New England. They just went and replaced wooden beams & columns in the designs with steel ones-sometimes actually retrofitting existing buildings. I tend to think of it as "balloon construction, brick edition".

PS there was a fire in 1939 on the west side top two floors ballroom. This is covered in a newspaper article found in the Davenport library across the street. I’m an architect. A Fire introduces stress into the entire steel frame which is then exacerbated in the steel frame connections. A fire can also reduce the load bearing capacity of steel by as much as 50%. Because steel transmits heat very effectively a local fire can travel thru the frame. The fire was hot and sustained. Furniture being painted in the ballroom ignited the fire and caused the extreme heat experienced. This is factual history. I imagine it’s a contributing cause

@oldcynic6964

Жыл бұрын

Gail, if you could find the article and copy it and mail it to Josh, I think he would be appreciative. As he said in the video, he is not in a position to get to Iowa. Thanks

@JackieBluXO

Жыл бұрын

Yes! Looked a single family block house to purchase only to learn from neighbor, not seller, that the home caught on fire last year. Spoke with fire Marshall inspector for details and was advised plaster walls melted. Electrical panel was not replaced post fire. When I asked why no permit was pulled for electrical and did the wires melt, his response was, ma’am, do not buy that house, there will significant issues surfacing. Always call the fire department prior to purchasing residential or a commercial building and ask if it ever caught on fire, they can look it up for you.

They found a woman "peeking" out of the blinds of a window on the 3rd floor HOURS b4 the scheduled demolition. She pushed out the screen and yelled "I'm alive, I was waiting for help that never came".....it was truly frightening to know that the neighbors kept saying don't stop searching for 3 ppl missing and the officials ignored ALL of them. They were setting the explosives to demolish the building and they were only an hour away from doing it, when the woman was found in the building ALIVE and waiting for help to save her. Just unimaginable.

@randyheggen

Жыл бұрын

You did hear that she was NOT inside when it collapsed? She snuck in later to hide because she had multiple warrants out for her. She loses the hide and go seek game.

Ever since this collapse, I've been waiting for this video. It's like I tell my friends, you don't have an ax to grind; you just explain how things fall down.

The description I saw from another engineer was the building had started deteriorating due to water affecting the interior brick structure causing it to slowly crumble and drop into the void between the structure and the facade causing the facade to bow outwards.. The first repairs to the interior brick structure wasn't properly reinforced, the beams ignored, and the water issue wasn't resolved and instead was accelerated. The only thing done was to remove the brick that had gathered in the void and repair/paint the facade. The water and the deterioration accelerated and a new report was done. The owner refused the guy who stuck around afterwards quote as he wanted to reinforce the beams and the interior brick structure before carrying out the work. The ones who were hired didn't do that causing the collapse due to the removal of brick that was structural without adequate support to hold it and the beams up. Basically lots of cost cutting and hiring of workman who didn't understand/read the engineers report.

@matthewmosier8439

Жыл бұрын

I've been in the construction field for years and will admit that BEFORE knowing that the masonry in the West wall was supposed to be structural, I would have likely been less concerned about a full collapse and rsther would have just assumed that the facade was going to fall off (still a dangerous scenario) After hearing that the steel did not continue and only sat in pockets in the masonry, I would have immediately determined that a collapse was likely. I'm pretty sure few men who inspected the building actually dug into enough detail to realize that the building used the outdated method of bricks for the structure of a load bearing wall

Now I'm really hooked to see what modifications they made to this building. How could they so shift the forces throughout it. None of those pictures looked healthy. Also if you have large swaths of façade coming off a building in distinct paterns like that, your problem isn't the facade. It's the supporting structure behind it. Which should be a danger sign.

I been following your channel since the Champlain towers south collapsed. I am intrigued by your description and analysis of the building collapses. You have helped me better understand what Is going on in a building and how the integrity of the building structure and the failure of the buildings. Both through the design, weather conditions, materials and possible poor maintenance as many of factors working in the buildings. Thanks for making it interesting and easier to grasp. Looking forward to your next video on this investigation.

@uploadJ

Жыл бұрын

Well stated. I too 'tuned in' during the Champlain towers south collapse. I am always looking for a good YT channel with knowledgeable individuals who know their technical field, as I know mine.

Excellent discussion from a local retired architect

@BuildingIntegrity

Жыл бұрын

Thanks!

@KathrynsWorldWildfireTracking

Жыл бұрын

@@BuildingIntegrity _Building Integrity for Engineering Czar!_

I normally don’t like paid promotions but I like the fact you put it on the end. I watched it for you!

@KelseyDunlevy

Жыл бұрын

I appreciated that, too.

I think MORE Investigation is needed BEFORE they demolish if needed. I live your indepth videos. Thank you again.

@rubyoro0

Жыл бұрын

Fr! Take it as a case study.

@Paul_Wetor

Жыл бұрын

Good idea. If it's not going to collapse soon, now is the time to study it. The rest of the building seems to be holding its own.

@robertslugg8361

Жыл бұрын

But but but, demolition will insure that evidence goes away for good. As my dad taught us around 50 years ago during Watergate, it is never the crime, and always the coverup. Some people, mostly politicians, are incapable of ever coming clean on anything.

Back in 1985 I worked for the water company. As part of the job I was sent to a large home in New Canaan CT that was built in about 1906. The home was having a major renovation do to it and it was a really nice home. One of the contractors was showing me around. He said the walls were made out of 3 layers of red brick.

I get the feeling that the people actually working on that building had no idea how it was actually put together or how critical that wall they were working on was to the structural integrity of the building.

You have a very good approach for the general public. With a degree in civil engr I'm seeing many of the issues quickly that you then point out. Thanks for all of these sorts of videos that you have done over the past few years, greatly appreciated. It's always a good day when we learn something. 🙂 "nitty gritty details" == the GOOD STUFF 😁👍 Hopefully you have managed to find a picture of what exactly the winning contractor did as I don't see any evidence of support beams that would have had to have been installed first, before they did their work. My thoughts are that it would have been very risky to removed any support beams for the facia or the main structural brick work.

@BuildingIntegrity

Жыл бұрын

Thanks for watching and the kind comment.

@k53847

Жыл бұрын

It would seem obviously necessary (at minimum) to strongly restrain the bricks in the wall. I've seen some images from the engineer's repair design that showed sheets of plywood supported by timber. Not sure that would be close to enough to hold the wall, but they didn't even do that. When combined with the design's interior cribbing to support the beams it seems more like what makes intuitive sense. Be interesting to see if the investigation determines that the cribbing & plywood would have prevented this.

While I currently work more as an industrial engineer/product design my degree is in civil engineering. I have watched several people's versions of this video and have been more or less frustrated feeling like everyone kinda totally missed key aspects relating to age and construction methods of that era. This is the only one that matches up to my experience and interpretation of the issues and events. For whatever that is worth...🤷‍♂️

@BuildingIntegrity

Жыл бұрын

Thank you for that. I try not to rush out the videos to be "first" but really try to understand everything so we can all figure this thing out together. This sometimes takes longer than I like, especially with my IRL obligations.

@ttrev007

Жыл бұрын

@@BuildingIntegrity I appreciate you taking your time to get things right. I knew when i saw the news that it was worth the wait to see your analysis of the collapse.

@Sarcasticron

Жыл бұрын

@@BuildingIntegrity Your videos all show the care you put into getting it right.

I've been in construction since 1972 and have always done very high quality work. Watching your videos inspires me to do even better. Thank you so much for all of your hard work in producing these videos.

Once the exterior was was noted as being out of plumb by residents, building owner, city inspectors, contractors and structural engineer. Given that exterior wall was structural, why wasn’t building condemned or evacuated pending structural repairs? In California, building would have been Red Tagged. In Florida, would this building have been condemned? PS - You used the term welded. Weren’t all steel building riveted at that point in time? PS2 - seems building should b scanned by laser to memorialize the actual positions of the remaining brick before building is demolished.

@dennis2376

Жыл бұрын

Riveting was the method that went from the 1800 to about 1930, according to online sources.

@helenhebert7127

Жыл бұрын

Yes, it would have been riveted. Worked on many buildings of this type of construction in Chicago.

Looking at the original plans for the ground floor, the collapse area was originally the main kitchen. I think the "stack" was probably the exhaust stack from large boilers in the basement, probably running the full height of the building to a chimney on the roof. It seems like a plausible size for that purpose in a building of this size.

Arg! You've given us a cliffhanger! When will Part 2 be out? IMO they need to delay any demolition until a full investigation has happened. I'm always leery when decisions are made to rush a demolition,, cremation, or otherwise make taking a second look at the evidence impossible.

@WillArtie

Жыл бұрын

Wasn't there something that happened in New York in early 2000's where they did that? Got rid of the rubble quick smart. Sure it will come to me...

I watch a lot of disaster videos because I’m typically interested in the sociological & psychological implications but you videos are so informative of the mechanical workings of structural disasters. The way you can explain these engineering concepts is brilliant. It never feels dumbed down but you explain it so well. I always look forward to your posts

I was just wondering if you would cover this incident and a minute later this video popped up!

@BuildingIntegrity

Жыл бұрын

Hope you enjoy and learn something. The news outlets are generally following a lot of false leads... hopefully with this series I can focus the attention on the primary causal factors.

@Der_Ingenieur

Жыл бұрын

I definitely enjoyed this video and can’t wait for the follow up. I found your channel after the Surfside collapse and have been very impressed with your ability to break down the story to factual details. Sad topics, but the way you cover this material is great from an engineering perspective.

Are there any Americans out there wondering why the city was in such a hurry to try and condemn this building particularly with possible survivors still inside? I'm absolutely sure it had nothing to do with the possibility that more negligence might have been found on the part of building inspection and code enforcement.

@SirSamuel_Smith_Squirrel_TheIV

8 ай бұрын

I live in the city of Davenport, I was actually hanging out with some buds a few miles away. The main theory me and other people have is corruption or attempt for a quick cover up by our local politicians. After the delay for the demolition 1 politician resigned and several people were put under investigation by our local FBI office located across the Mississippi in Moline.

Looking at the Plan, in addition to the beam ends being supported only by the bricks at their outboard ends, the tie-ins between the East-West floor beams and the North-South beam are not in locations where the loads would be readily transfered to the columns., except at c6 and possibly at C1 & C2 Given the age of the structure, I expect that the connections were riveted, and when the structure failed, the rivets pulled out of the gussets / connection plates. In some ways, it's amazing that the structure did not suffer a more extensive collapse, given the extensive deterioration of the exterior wall and its foundation. Sometimes, it's a good thing that we don't make 'em like they used to...

Looking at what you show, which I love the detail you go into with things, I would agree that it would be a crime scene. I can see where both building management and contractors both have a big part in the collapse due to the lack of proper repair work, and shoddy workmanship on the work that contractors did.

The suspense is killing me, we need part 2!

From the Sanborn Maps it shows a smoke stack 20 feet above roof where it says stack ... as this building did have a heater/power house in it in 1910 at least - i will try to post link for sanborn map page in a reply

@uploadJ

Жыл бұрын

Thank you.

@brianberthold3118

Жыл бұрын

guess it doesnt post

Outstanding work Josh....can't wait to see Part II and maybe III....I think the City has a lot of liability in this. Thank you for covering this tragedy. It is very sad people had to die and be seriously injured. Prayers for all those people.

@rcpmac

Жыл бұрын

The city doesn’t have liability where a project is signed off by an engineer. That’s why an engineering stamp is required on the permit submission.

@jaynecobb3701

Жыл бұрын

The city has no liability even though it appears they played a significant role in this disaster. They have qualified immunity.

@tomparker9966

Жыл бұрын

@@jaynecobb3701 Most cities are self insured. Which means the taxpayers cover the losses.

Could the "Stack" have been a smokestack, and that metal object could be an old boiler or furnace or something that was long retired, but left in situ?

Painting bricks is never a good idea: you will create an outer membrane preventing - at least in some extent - breathing moisture out from these stone sponges. This happens especially, if you use latex based paints. If the renovated areas were painted, paint samples should be taken and analyzed.

@mikapeltokorpi7671

Жыл бұрын

Also, it looks like that in ground floor there were at least three tall windows/doorways in the middle of where the collapse happened. These look like non-original design.

Stack was another shortening of smokestack used in reference to ship, might that stack have been exhaust from a boiler in the basement?

@BuildingIntegrity

Жыл бұрын

This makes the most sense. Being born and raised in southern Florida, we don't have basements... or boilers really... lol

@king_br0k

Жыл бұрын

@@BuildingIntegrity glad I could help

@SnowmanTF2

Жыл бұрын

Seems to fit with having a brick channel several stories high, plus it would make sense would be made redundant when converting it to apartments if added modern HVAC. Leaving a tunnel that could be used for new pipes, ducts, and/or wiring for the renovation.

Wonderful presentation as always. As unfortunate as this tragedy is, it could have so much worse - even as bad as Surfside was.

@alexwyler4570

Жыл бұрын

They built buildings much stronger then. Even the steel was way better quality.

@Charlie-Oooooo

Жыл бұрын

@@alexwyler4570 yes indeed. They built *everything* stronger back then. I think in part because they didn't have all the engineering capabilities for 'maximum load/stress calculations' and other design tools. Driving blind, in a way.

The truss structure is probably mid building. My understanding is they were put in old buildings to allow for large open spaces inside the buildings, or when the engineers thought the structure needed a little more support mid building. They were a precursor to shear walls- the truss would be stable in plane.

I would that that the servants rooms might have been reserved for guests who traveled with servants in those early days. Usually a man would have a valet and a women would have her maid to accompany them while traveling. That is why a lot of these properties have or once had a rabbit warren of small guest rooms. Typically refashioned to accommodate today's needs. I think that it would be unlikely for the hotel itself back then to house any of their own staff.

@uploadJ

Жыл бұрын

Interesting historical detail. Thank you. Posts like yours are why I like to go deep into the comments section.

@allangibson8494

Жыл бұрын

“Colored accomodation”…

@kennixox262

Жыл бұрын

@@allangibson8494 Could be butprobably not. Historically, a valet and ladies maid would be have been white and probably even those from the south traveling with servants (paid).

@allangibson8494

Жыл бұрын

@@kennixox262 Servants from the south were almost always black in the 1900’s following the collapse of “reconstruction”. The White House service staff was almost entirely black into the 1990’s.

Many photo editing tools will let you subtract one picture from another to find the changes. If you overlay that back on one of the images, it may give you more insight about what's going on.

ONLY half way thru the video, and I am once again impressed with your ability to present complex material to the public in a straight-forward manner. The amount of cross-checking you've done to match up pictures with the drawing is certainly first-rate and so far unique in analyzing this structure's partial collapse.

Thank you for another outstanding video Josh. There are so many of these old masonry or masonry hybrids around the country. Even a mild disturbance can bring them down.

The whole building is unstable so they lean in a few twigs to hold it up? Good lord.

@Structural Integrity thank you for helping the community with your practical knowledge. The city certainly failed it citizens here.

I sincerely doubt if there was any "welding" of any steel components in this building, the connections would have been riveted with gussets and shelf angles. A lot of buildings of this period used "stacked" column construction (as you discuss) with a lot of those featuring "pilasters" of which some were just extended brick facade for appearance and some of which added section for column support. This building would have been stable if the contractor had installed a falsework to relieve the brick columns from the distress of the ongoing work and to give lateral support to the column sections.. You're correct in that missing array of bricks at the bottom of that stacked column is frightening! I have a suspicion that the engineer and the inspector are in a lot of trouble. Depends upon the contractural verbiage and all the lawyers that will be swarming... This building can be rehabilitated but it is going to be expensive-that fact is what caused the situation to deteriorate in the first place. Thanks for your presentation.

@HenryLoenwind

Жыл бұрын

The engineer specified extending the foundation inward and putting in support columns just inside the wall to take the load from the beams. But the owner managed to find a contractor willing to skip that and do the job cheaper (and one contractor who wasn't and got quite loud about it). I don't understand why the US doesn't require work to also be overseen by an engineer when it's work that requires an engineer to design it. Contractors ignoring half of the engineers' plans seem to be the cause of collapse all the time...

@geoffmorgan6059

Жыл бұрын

@@HenryLoenwind It depends upon the jurisdiction and all manner of legal entanglement. I'm guessing you recall the 1981 "Skywalk" collapse at the Kansas City Hyatt-Regency hotel which killed a number of people. The engineer's plans were modified by the fabricator/contractor to simplify the welding design. Even though the engineer was not employed to inspect any of the work, the engineer was held responsible. This precedent has caused a lot of turmoil and has increased errors and omissions insurance costs by an order of magnitude. Basically I agree that there should be professional oversight, however the real estate interests in the US rule and anything that might increase costs are difficult to institute. Another example is the Champlain Tower collapse in Surfside, Florida. Florida is looking at various oversight control options to improve quality and maintenance. I don't expect any major changes. The new nightmare is the Millennium Tower in San Francisco. The ultimate combination of real estate designated engineering. Wonder if Las Vegas is taking bets on when it collapses? So the answer to your query is "call a realtor".

Thank you, Josh, for bringing intelligent insights into what happened. Like your analysis of the Surfside collapse, it's the best on the internet.

Glad to hear from you. While I don't have any expertise in structures, I also wondered why the building was so precarious that people weren't allowed in to retrieve their belongings. Maybe the apartments on the west side would be too risky, but the steel structure seems to be holding.

@exrobowidow1617

Жыл бұрын

Looking at the clothes on the hangers in that one closet, I imagine a heavy-duty drone flying in to retrieve the garments one or two at a time. But the vibrations from the drone could stimulate further collapse.

@chicagonorthcoast

Жыл бұрын

@@exrobowidow1617 , Yes, that sounds like that could happen. Best just give the uninjured tenants enough compensation to replace their belongings as well as get settled into new homes, plus some compensation for the sheer terror and misery of it all.

@russellhltn1396

Жыл бұрын

@@exrobowidow1617 Vibrations from the done would be small compared to normal wind buffeting. I'm noticing a YT channel of a professional engineer thinks the rest of the building is probably OK. The problem was this wall.

Disclaimer: I am not a Civil Engineer (nowhere close), but after looking at the Aftermath of this collapse, I can't help but think that there was A LOT more wrong with that Building than just the Facade. They should NOT demolish that Building until there has been a super thorough Investigation. IMO this IS a Crime Scene.

Nice to see you back. Your illustrations are state of the art. As always you are very clear and thorough. I hope there were no inhabitants in the building at the time of the collapse.

@erniecolussy1705

Жыл бұрын

Three people lost their life. One person lost a leg. At least one other person was in the area of the collapse and recieved non life threatening injuries.

I believe the collapse was caused by the movement of the support wall away from the center of the building over many years which resulted in the floor pulling away from the "2 inch lip" as described in the original plan which was intended to carry the weight of the floor. The entirety of the weight of the free floating floor was then borne by the beams that had already begun pulling from their pockets. Over time, the beams continued to withdraw from the pockets as the bearing wall continued to move away from the center of the building. I think if you look at the photos in the document titled "Nuisance Abatement 23-6454" at times 2/9/2023, 03:39:12 PM and 2/10/2023, 12:12:41 PM, you will see evidence of the free floating floor and also that the beams have pulled four to five inches out of their pockets. At the time the photos were taken, the building was set to collapse.

Respect for helping FL push it’s condo laws forward. ✌🏻 This just shows your continued concern for your industry. Wherever it occurs.

Hello, Im SO happy you are covering this!! I followed you very closely with the collapse of the champlain towers!! I have said myself since looking at what I can look at with this collapse that the rest of the building seems sound to me. since it's a historic building I was hoping that they would repair it. People think I'm out of my mind with comments on different sites on the Internet when I say about repairing it, people keep saying that the whole building could come down at any moment but I do not see that as a possibility. I'm glad to see your professional analysis on this. I will continue looking to see your thoughts with future videos that he may be making. I'm not an engineer but I am a can make sense of everything fairly well. Thank you for doing this!!!

It’s very important for the surviving tenants to know if they can go in and get their stuff out or not.

@bobloblaw10001

Жыл бұрын

It was demolished last weekend according to The Quad City Times..

I'm an old fashioned Site Agent - here in Britain years ago every project over a certain size had one and It was a sad day when the practise stopped! Site Agents are employed by the contractor but with a high degree of independence - he is ultimately responsible for everything that happens on site - good or bad! Qualification was by practical time served experience rather than formal certification - starting in a trade and progressing through artisan management foreman & general foreman and many guys of similar longevity to myself shudder when considering that most of the "professionals" - Architects, Surveyors and even Structural Engineers gain specifying power without ever having laid a brick or bolted up some steelwork. Our Planning Departments and Building Control reside with the local authority ( council ) Planning can be highly political and for big schemes is open to abuse and financial irregularities - Building Regs (Regulations) are pretty stringent but much of the Inspection has been privatised. I realise things are very different in the United States but for all you Persons of Note having to sign off on virtually everything - you seem to have an awful lot of buildings and bridges that fall down. My first observation of this building is the fact that the "facade" seems completely free standing without any sign of tying in - and the standard of bricklaying is laughable (or it would be had it not killed three people). The idea that a single skin of brick can be slapped up six storeys trusting to faith, hope and charity that it will stick to the crumbling structure it covered up is to my mind - criminal.

@willlock3644

Жыл бұрын

I love this comment!!!

Fantastic! I've been hoping you would be covering this!

Thank you so much for covering this! 👍

I live 90 miles from Davenport. We have freeze thaw during the winter here. And soft vitrified clay brick is subject to being damaged. Add in 110 years of winters and humidity from human occupants will find the exterior brick wall. There would be no vapor barrier in this building unless it had been modified to incorporate new structure to insulate that west wall from the heat of summer and chill of winter. I did see bats of fiberglass insulation hanging from areas after the collapse. I don't recall it having the kraft type vapor barrier, nor did I see any poly plastic sheeting.

@alisonwilson9749

Жыл бұрын

Specialist old building surveyors in the UK these days are saying that retrofitting insulation into cavities of older houses is a lousy idea as it creates damp problems (and we're experts in cold, damp weather over here😉).

@HweolRidda

Жыл бұрын

​@@alisonwilson9749 I am not sure I agree with your wording. People in Britain (and the Netherlands and ..) have lots of experience with cold and damp. I have seen less evidence of expertice. Going there from Canada, where real cold can cause serious condensation in walls, I often see construction that leaves me in disbelief. If people are adding insulation without considering moisture then trouble is on its way.

My brother-in-law bought his first house in a town that was financially supporting people like him that were willing to buy a home and help fix it up. Over the course of a few years, he was doing a lot of work but found brick under the house (crawlspace) and in the back yard and couldn't figure out why. When he got to the last room, a small bedroom on the second floor, he found the same brickwork intact behind the lath & plaster. He stopped and called a recommended contractor who came out, looked at it and told him to stop immediately. It turns out that the house used to have a brick chimney that ran from ground level up through the roof and what my b-i-l found was an unsupported section of the chimney; the only thing holding the brick up was the roof. Needless to say, it took a "professional" to do the required work without incident.

My office is in a 1903 12 story "skyscraper" built in this same era. Most of the interior was gutted during a renovation, so we were able to get a good look into the structure of the building. Since the subject building was built in 1906, the columns are likely not welded, but rather riveted together. Truss D will likely be revealed to be an steel "X" riveted togther and then riveted to the columns. Because of the height of our building, its a precursor to themodern welded steel cage, so the thick masonry walls are just supporting the weight of the facade of our building. But it does have trusses in the interior, which place it at a disadvantage when reconfiguring the interior spaces.

good to see your digging into this for us .Thanks

Great content! I grew up in this community and have been very interested in this tragedy. Im glad you’re analyzing it and look forward to Part 2. PS: I understand the building has no basement and so I wonder if the “stack” was the boiler and chimney location. This Midwest community experiences harsh winters and would almost certainly have had a steam heating system.

@stevevarholy2011

Жыл бұрын

It was likely both ventilation and utility chases. The 1903 building my office is in has a utility shaft in it, as well. Pre airconditioning, it acted as a ventilation chimney as well as psace to run plumbing and conduit.

@superpsyched7171

Жыл бұрын

There is a basement. You can see the opening after they remove the rubble on the ground. Some people were worried that homeless people were down there when it collapsed as they were known to shelter there.

recognizing the danger it probably would have been possible to jack the beams and repair the structural brick properly.

Great work as always Josh. Even though I started watching this channel after the Surfside collapse, I'd be happy to never see you do another building collapse. That's from the point of view that they're devastating & I'd be happy to not see another collapse. There's plenty of other great content from Building Integrity. But when these awful tragedies do occur, I'm glad that I can tune into a fantastic resource to get top notch information. It's interesting, I learn some basics (& what to/not to be concerned about), & Josh just comes across as a good & genuine bloke. Love people that can say the difference between "I know this" & "this is what I think happened & here's why". To top it all off, Josh has a real talent for making complex things understandable to laypersons like me.

Coming from NY City, where as a teen in the 1970s I was an AVID collector or arhitectural ornaments from demolished or soon to be demolished buildings, (Usually 5 to 7 story tenement buildings about 25'x100', I used to sneak in at 2 AM and remove all the bricks behind keystones and spandrel panels etc and take home the terracotta or stone carvings. I well remember the facade bricks were high quality hard brick, one layer deep, backed up with 2 layers of comon red brick, making the wall a foot thick. ALL of the brick walls on the sides (the longest walls) were load bearing, the wood joists spaced a foot apart were set in pockets in the brickwork. An interesting design was the ends of the joists, usually they were about 2x10's rough cut pine 24' long- were cut at an angle, the idea was in a fire the joists and floors could fall in without taking the walls with them- the angled ends would fall out of the pockets, not sure if that was done in other cities or not. I have pictures in my book "The Gargoyler of Greenwich Village" of many of these buildings, even at that age- 14-15 I was able to safely remove ornaments from the facades and not cause a wall collapse. Even keystones could be removed because directly above was just a few courses of bricks to a windowsill above, it was the "coluns" of bricks between the windows that did all the supporting. I remember a set of 3-4 connected buildings on E12th st that had 2 square grotesque panels located in one of the wider brick "columns" which was between two buildings, I knew I could safely remove one and had to leave the other to support the "column" but some idiot came along and removed the other grotesque panel leaving that whole column of bricks literally hanging in mid-air with nothing but the mortar adhesion and a little mechanical "locking" between the bricks! At some point that wall collapsed onto the sidewalk. It was the same kind of thing on a building on Eldridge St, two large figural corbels supported a slab of stone over the entrance, the stone slab was about 10' long, maybe 4' wide and a foot thick- one long side was embedded in the brick wall, I removed one of the figural cobels and knew I had to leave the other, again, some idiot tried to remove the other corbal and I later saw what happened- the corbel AND that slab of stone and a significant amount of the wall above were laying on the sidewalk! That slab of stone weighed around 6,000 pounds, the corbels about 350 each. Brick walls can take a lot of holes in them, BUT if a wall gets out of plumb, or a bulge starts to form- there's very little way of saving it beyond taking it all down and rebuilding it. The old Broadway Central Hotel, built in 1867 partially collapsed onto Broadway in Aug 1973, a bulge was reported, and not much done about it, but a tenant who had a theater on the ground floor was on the phone with the buildings dept reporting cracking in the walls and strange noises, he was on the phone when the collapse happened! There had been an illegal doorway cut thru a brick bearing wall in the basement too that contributed to the collapse. That facade on the street side was not a load bearing wall but it was mostly stone backed up with brick. Some research my part discovered that this hotel's walls were built on top the the fire damaged water soaked ruins of the LaFarge house, a theater that burned down- they REUSED 5 floors of the facade wall and ADDED 2 more floors and a huge mansard roof on top for the 1867 hotel! Something tells me that with the fire and water plus adding 3 floors, and the subway vibrations underneath- the foundation started to sink a little and the inevitable happened- the wall collapsed.

@HobbyOrganist

Жыл бұрын

As a side note, the floor loads involved were not great, I dont know what the original purpose of the building was, assuming it was always residential apartments, were talking about minimal floor loads from some furniture, a book case, bath tub/toilet, the brick wall would have had no issue at all supporting that, it wasn't like this building was a newspaper printing firm and that they had multi-ton printing presses up there running and creating vibrations. Also, for 1906, I'm thinking the columns were likely cast iron and the beams wrought iron not "steel" as we know it to-day, which is of no consequence as it was the brick that failed not the beams. It looked to me like the mortar was originally very poor lime sand mortar, you could scrape it out with a screw driver and pull bricks right out by hand, it also washes out from rain water washing down. That is why in NY City all th eold buildings typically had large projecting cornices on top of the facade wall, it was decorative BUT it kept the water off/out of the wall, invariably when these are removed due to wind damage/age, the mortar on the top floor gets severely damaged by rain and has to be repointed. This Davenport building has no cornice on this West wall. Also, in Iowa there was a brick manufacturer in the 19th century whose bricks were very poorly fired, there's an old brick shed on my property line made with that brick, and their quality control sucked- some of the bricks are intact, others basically disolved like sugar cubes in water! what happened was the bricks were not fired properly in the kilns, either not hot enough, not long enough or both, so batches of their bricks went into buildings all over Iowa like that, and you can see some bricks at random in the walls half disolved while adjacent bricks are pristine! This MAY be a factor in this Davenort building collapse, the bicks looked like they were disolving from rain water in places

@uploadJ

Жыл бұрын

Super interesting post! Thanks for taking the time to make it. Posts like this make it well worth-while to cruise the comments section. Thank you.

Be interested to know the history of the chiller unit or whatever the large metal unit is on the roof. Would be interested too to know if the new brick in the brick column aside the door, i.e. the element that blew sideways - appears to contain new bricks - were those higher density engineering bricks or did the density match the original masonry, likewise the repair mortar - was it modern cement mortar or traditional lime, the point being a stiff pier will attract more load...and what was the door frame made from, was it aluminium or uPVC...both less stiff than oak or steel...as presumably the original would have been. This is an excellent example of how load paths in masonry are not infinite - failure can occur, particularly when multiple discontinuities in masonry stiffness are present through the original fenestration and later modifications.

A brick wall bulging like that is just a pile of rubble with no structural strength. I don't know what the council inspectors were doing but the building should be evacuated and fenced off immediately. I can see why the other contractor was concerned!

I saw the engineers inspection about 5 days ago. and he stated that he did not know if the beams were supported on steel or bricks .I think he should have found out before he drew up the repair plans . I think he should have come up with a plan to support all 6 floor beams at the same time to lift them to there original elevation .The wall started to deteriorate from the water leaking from the cooling tower on the roof. Notice the new gutters and downspouts. Cooling towers have constant run off to remove mineral build up and with no gutters it ran down the side wall of the building .

@rubyoro0

Жыл бұрын

Since the guys that built the pyramids are out of commission…they should have hired Josh.

@daveuggla8383

Жыл бұрын

Supporting all 6 affected floor beams (and jacking them up) would only deal with the weight of a single story of floor and wall system. It would not relieve the weight of the upper stories, still carried by the load bearing wall. I think this fundamental oversight by the PE led to a total misunderstanding of the degree of danger involved. He apparently speculated openly about whether or not there were vertical steel columns inside the wall. Without knowing that for sure there is no way he could have done a proper structural analysis of the building!

Great video, as always, Josh. Thanks for doing it. As for tearing down the building, the city is probably concerned about the other facades failing in the same way in the future and doesn't want the finger pointed at them if it does. CYA, and all that, right wrong, or otherwise.

@oldcynic6964

Жыл бұрын

El Cheapo: I concur. It seems unlikely that the other walls would NOT have the horizontal beams resting on the structural brickwork. So, it is possible/probable that they are also at risk of collapse. The alternatives are to repair the building or to pull it down. I suspect that the cost of repair and certification would be high, and I suspect that no insurance company would insure the structure (at anything less than an eye-watering premium!) Would anyone who lives there be happy to carry on living there ? Would anyone buy a unit in the building in the future? I suspect not, unless the price were to be ridiculously low. So the current owners are best served by getting the building condemned, as long as their existing insurance provides them with SOME payout, and if the (cleared) site has SOME value.

@uploadJ

Жыл бұрын

Good point - I wonder how much bulging, or cracking is seen in the other walls. This west wall could have been the worst on account of weather/water ingress.

I'm always amazed at what a great teacher you are to let layfolks understand your very technical presentations. You have a GIFT for doing such, and thank you. Hopefully, your information gets to the right people to shout out that indeed, as you asked, that there needs to be an investigation prior to it being torn down is my opinion. ETA: PLEASE keep us up to date ALSO on the political decsions ... know not your focus, but is such a part that I won't see elsewhere unless you post about it.

I completely agree investigations need to be held. When an airliner crashes and people die, the NTSB doesn’t scrap the wreckage before getting every minute detail in an investigation. Why shouldn’t we do the same on a residential building that causes death, particularly when the remaining structure is relatively safe? Investigate and hold accountable. County just wants it gone because they’re complicit with the crimes.

@alisonwilson9749

Жыл бұрын

Even if it is not a crime thing, it ought to be a learning opportunity.

Josh: I have probably watched all of your KZread presentations, beginning with Surf Side. As a retired consulting electrical and mechanical engineer, I worked with architects in the design and construction of ( mostly ) commercial buildings for about 52 years before retiring in 2020. My work was the design and project overseeing of all mechanical and electrical systems in the buildings. I had the opportunity to work with many excellent structural engineers and was required to locate equipment point and total loads to them. I also had the opportunity to design the first casino in Deadwood, South Dakota. The existence of "almost falling - down" structures made our work interesting, to say the least. So, as my wife and I have family in Iowa, the partial collapse of the Davenport building is of particular interest. I look forward to your next installment. Thanks for all your good work. PN

Very clearly explained. I do think the building needs to stand a bit longer so a thorough investigation can take place. It is curious how the rest of the building didn't get pulled down by this collapse.

If they don't get someone else to do further work on the building they definitely should bring it down. It is shocking how some people get positions they clearly are not capable of handling. Usually they are in government. Nice job explaining things. I'm looking forward to part two.

My shop teacher once told me…”stop before you fix it to death”

I saw a video where the city of Davenport had issued more than one order of building vacancy, yet the building was allowed to be inhabited. This building had way too many problems. I think calling it a crime scene is accurate.

Impatiently awaiting Part II.

Great -- I've been waiting for Josh's input on this sad tragedy.

That confirm my theory: most dangerous things to any structure are repairs, renovations, upgrades and such...

Often people are annoyed at rules, regulation, inspections but this shows how important proper application of the right rules with adequate inspection and enforcement is so important.

I've watched some videos on this but have waited for yours! Thank you for taking the time and effort to do these videos!

Can't wait to see the second video. I watched every one of your Surfside collapse videos at least once. I'm not typically interested in structural engineering, but I'm always fascinated by how things fail. While I live in the SF bay area, I fortunately do not live close to the Millenium Tower. :)

And our city somehow got the mayor who was indifferent to the whole situation reelected. The corruption is deep. I appreciate you so much for bringing this to the public eye.

@abbyf7610

6 ай бұрын

I almost lived here. I toured the building a month before the collapse.

@cmillerg6306

3 ай бұрын

I also live in Davenport and find its town council only interested in its local biz interests. I call this town Davenpothole. Check out a graph of Davenport population vs years. Steady growth until 1980. Since then, it's been flatlined at 100,000

For a 115 year old building, I am genuinely impressed at how true the rest of the building looks. I grew up in a town that mostly dates back to the late Victorian era, and none of those old buildings look anywhere near as solid, and most of the original angles and walls are anywhere near plumb. The difference from the 1880s to this style of building is in the Victorian era, most buildings even of that scale were still made almost entirely out of wood. Nothing has kept its shape. The brick and steel looks remarkably robust. If someone wanted to preserve the building, then revitalizing or replacing the brick supporting columns would allow this building to stand for another 100 years easy, imo.

As best I recall, 'stack' was similar to 'chimney'. Given this building was built in 1907 or so, there could well have been a furnace or hot water boiler in the basement, and possibly also a hot water heater. These need an exhaust, and the square hole marked "stack" on the drawing could well have been this exhaust/chimney. It is possible that the kitchens could have been on the ground floor (or even the basement) and the stove exhaust may have also fed into this chase. There would have been a roof penetration and a brick chimney top above that, but that was doubtless demoed and patched over decades ago. The part I see interesting with the picture of the brick column with the hole in it, is not the hole. The bricks have cracked down the middle of the column for a considerable distance, effectively turning it into two columns supported N-S only by the adjoining window frames. And the south of these two half-columns is then supported on air because of the hole. The photo is blurry, but it also looks to me like there are multiple places the existing bricks have slipped sideways over the lower bricks, and it looks like both of these half-columns are slightly tilted with respect to the rest of the bricks in the building. Overall, it doesn't look to me like this column could have supported much more than it's own weight for any length of time. In all probability the building will be demolished to a) remove any possible evidence of the reasons for the collapse, b) make the city council happy, and c) it may be impossible to get insurance on the remaining structure.

@allangibson8494

Жыл бұрын

Actually I would bet on steam heating rather than hot water circulation for heating. Probably a coal fired boiler in the basement.

@BuildingIntegrity at t=8:41 in your video, you show the picture snapped by the contractor a few days before the collapse. I noticed that to the left of the door, on the second-floor window (left of the little window) the frame of this window looks deformed as though there is subsidence below and to the right of that window. Could you explain what is going on there? The steps in front of the door also look bowed down in the middle with a potential foundation crack to the left of the steps. Is it possible there is some sort of slumping happening in the foundation that would have reduced compression in the column with the missing enough to allow bricks to fall out there?

@alisonwilson9749

Жыл бұрын

I was wondering the same. That would put even more stress on the brick 'columns', it would be tearing them apart. It's amazing what really good bricks and bricklaying can take and still stick together. Some previous owner of this house removed a big chunk of the inner brick wall, about a yard high and about 4' wide, between a window and a wall corner (we think to put in a washing machine) leaving the wall above pretty much in effect just corbelled out form the corner of the house. 😬It hadn't moved at all, not enough to do more than crack the mortar on more than one or two 'hanging' bricks. Needless to say, I bricked it up properly sharpish, keyed it in to the corner, and put in wall ties etc to the outer skin, which itself hadn't moved even a mm. But it must have been like that for at least 30 years, possibly a lot more.🤔

I've been following your channel since the Surfside collapse. Really interesting. Can't wait for part 2!

Amazing how you can deliver information to people that have no clue on the subject prior.

I love your analytical evaluation of these events. So methodically broken down. It looks like the brick veneer of the building was being addressed in the various repairs, but the structural supporting brick wall underneath was not given a lot of attention. Was the mortar of the structural wall decayed to being the weak point in the assembly? Also, with such tall windows, both existing and replaced, that caused a weak point in the lateral support, being there were no lateral beams connecting the east/west horizontal beams together. Also, in the large wall repair, could the contractor not realized this wall was the sole support for the transitional beams? Just some thoughts.

@HenryLoenwind

Жыл бұрын

A long-term issue of the building was that the weather-proof facade layer separated from the non-weather-proof inner layers of the wall, allowing moisture ingress and so the inner load-bearing bricks crumbled. There were some superficial repairs to the facade (when it was painted red), but the damage to the inner layers was never addressed.

@matthewmosier8439

Жыл бұрын

I really tend to think nobody looked deep enough into the drawings to realize that there were no steel columns hidden underneath the facade. To be honest, I have no idea why such a method would ever have been acceptable in construction in the first place.

@HenryLoenwind

Жыл бұрын

@@matthewmosier8439 Why would one put steel in there? Brick in compression is very happy and sturdy...and unless you let it rot away will stand for hundreds of years.

@matthewmosier8439

Жыл бұрын

@@HenryLoenwind Good question. Concrete and masonry are a zero under tension. Concrete buildings are held up by steel, basically, since without it the concrete would crack and collapse. The facade made of brick is even worse, in my opinion. Each brick can seperate from the others around and weaken the overall structure. There is also the movement of brick as loads pressure it to deform (basically balloon in or out) A steel beam surrounded by brick would be great. A girder running atop the masonry at the level of the steal beams which tied their loads together and spread out the footprints would also be good, at least in my opinion. Concrete and masonry are too trusted by people, I think because they have been so easy to shape into things and possibly because our minds psychologically associate those materials with strength and durability.

@Underacactus

Жыл бұрын

I suspect the original construction relied on those tall window lintels (of brick) to be sufficient lateral support. Which they may have been until the structural brick degraded (from water seepage & crummy facade work pulling it down). Interesting to know how the rest of the building’s exterior lateral support bricks/mortar are holding up…

I am curious to find out when the structural column was damaged, if that was done during the repair or before. The water problems probably occurred because the collapsed side of the building faced the windward side of the structure and suffered from rain, freeze and thaw cycles for over a hundred years. The paint probably accelerated the deterioration by trapping the moisture in the brick.

@alisonwilson9749

Жыл бұрын

Indeed, painting brick is a terrible idea. Some berk(s) had painted the brickwork on our (UK) 1920s house. Three layers of gloss, over the years. It could be peeled off in flakes using one's fingernail; on a dry hot day, you could peel some off and behind the paint the brick was visibly damp- it would then dry out in the warmth. We had to have the lot glass-blasted off. Luckily we have have very hard, shiny brick so it could take it. Now I have to rake out and repoint with lime, as (probably the same) berk(s) repointed with cement mortar- no good at all on a 1920s house like this one.

@uploadJ

Жыл бұрын

re: " The water problems probably occurred because the collapsed side of the building faced the windward side of the structure" On point. I had not outright considered that.

It sure struck me as suspicious that the City ended the rescue the very next morning even though family members were clamouring for their loved ones who were still trapped. The City claimed it was because it was too dangerous to keep looking. They even wanted to immediately demolish the building and talked about demolishing it the very next day! That definitely sounded to me like they were trying to hide some type of criminal behavior involving the building and city personnel.

Josh, thank you for latching onto this incident and offering your analysis. I appreciate your research, analysis, and detailed explanations. Great work!

Great presentation. Really appreciated your finding the drawings. I just can't wrap my head around how no-one aside from that one contractor saw this coming. There's one window at 8:10 (second from left) that is horrendously cockeyed. Are those windows mounted in the facade or in the brick behind the facade? (or both?)

@HenryLoenwind

Жыл бұрын

The outermost brick layer is the weather-proofing for the inner brick layers, which are made from a cheaper type of brick that is not weather-proof. So the windows must be mounted to the outermost layer to complete the seal.