Failure of concrete anchors explained 

As a licensed professional engineer I can say you did an amazing job with this video. Also Simpson Strong-Tie also makes a really good software and is my preference for design and product selection.

Very concrete explanation.

This was really interesting to watch as a hard surface concept artist for the game industry. It gave me some insight into how to better communicate believable patterns of both construction and damage.

7 whole minutes on concrete anchors. I needed this

Italian restaurant in Canberra, waiting for my wife to have dinner. This popped up on my RU-vid and I watched it without sound immediately sent to my best mate. Builder and my favourite apprentice in Sydney. Great work

explanation is simple and concise. thank you. wonderful after images and failure animation too.

I appreciate the information . I was once told by my brother of a failure of structure that the root cause was where the rebar placed in the concrete was not correct . It was at the wrong dept in the concrete . Not shocking news but it was important to note how placement of the rebar effects the load handling of concrete

You have done an amazing job! You have shown the impact engineering can have in solving global problems. Bravo for your hard work and dedication!

Thanks for the explanation/information I work in the rope access field and this helps a lot to keep remembering all this types of works

Excellent presentation on anchors. In the past, I preferred using post install types. I found it easier to accurately place anchors when working on a flat finished slab. When using J Bolts, we used a template made from plywood with holes for the bolts. We would place template and bolts in concrete together; depth, spacing, final dimensions. in 1 step. We also had dimension points on template and outer forms. This helped getting accurate placement. Once the concrete has hardened, very difficult to fix an error. It was always less expensive doing it right, than having to fix it later.

Good video, I use drop ins during concrete core drilling and always wondered what kind of failures could occur but I didn't think of how many there could be.

very impressive demonstration. Further more comprehensive videos will be awaited on "Anchors"

I've been a drafter specializing in precast concrete structures for the past few years, and I like the way the info in this video was presented. I'd love to see a video on concrete embeds and prestressing strand. But for now I'm off to watch any other videos you have.

A very good presentation! Thank you for the clear and concise explanation. Your animations were particularly well done. You are a gifted communicator.

Very nice and short, and perfectly illustrated, thank you.

Thank you for an informative video that helps explain the data sheets that suppliers post on their websites. I have been trying to investigate the differences between wedge anchors and drop in anchors as to their abilities to suspend loads. Drop in anchors are industry standard in my trade, plumbing, for hangers, while wedge anchors are used mostly for mounting items to floors and walls. I have seen only a few times wedge anchors used to suspend items and wondered why they are not used ,ore often.

These videos are incredible - keep up the good work!!

I built some footings/bases for some very large planters and being an auto technician thought I would get some advice first, Which I sought from a guy in our village who designs big civil engineering stuff docks,quays,bridges etc.over a couple of pints in our local pub. Following his tips and adding my own idea by constructing a welded framework of 3/4" rebar to hold the fixings so the load is spread more evenly through the concrete base. Later when he came by I proudly showed him them,he said that they were far too big and his quick estimate reckoned the fixings offered about 40-50 ton of clamping force and that combined they could support one end of a typical pedestrian overpass🤣🤣🤣.They are still there though😁

Amazing video, Dude. You're killing it

A very interesting thing to observe about the anchoring mechanism it is its capacity to (if its properly designed) to act as a fuse, locating the damage due seismic or dynamic loads in the anchors. Nice video by the way

Being a psychology grad from a family of engineers I thoroughly enjoy your content to relax before bedtime

This the one side of RU-vid that I like I was not aware of this information and I would like to say thank you very much

Hence the famous movie quote "We're gonna need a bigger bolt". Who knew Jaws was an engineering movie?

Thanks especially for the math. Math for these subjects is greatly under-appreciated. I over the weekend, I was installing a handrail for my swimming pool - it bolts to the concrete on the edge of the pool and has a massive 48" overhang out over the underwater steps. So the leverage on it is huge and I worried that the four drop-in anchors provided with the kit might be insufficient. I did the math for a 300lb person leaning on the end of the handrail - and looked up the specs on those anchors - and...holy cow...nowhere near enough! So I got some 1/2" undercut anchors and was happily installing them when I found that the holes in the base plate of the handrail were a little too small. So...drill them out - right? Well, it's a 5mm stainless steel plate and I wrecked three drill bits trying to do that! So, score 10/10 for the math, 1/10 for my own materials knowledge!

Good video. First I've seen, almost worth watching twice... I'll be back for more.

Considerations, Specifications for anchor bolts via use of concrete: no to be used when vibrations and exposure to freezing temperatures are present…in time they such type of anchorage will fails. (vibrations will be a pulverizing action between the bolts threads and the holding concrete…freezing temperatures will act as a expansion and contraction of water moisture between the bolt and holding concrete reducing the holding strength bolt-concrete to failure.

Excellent video, once again. Thank you for your effort.

Clear and succinct information! Well done.

This is a pretty good high level overview. Nice job.

I like your approach to defining these issues.

Excellent information, presentation, graphics.

animations are great and helps to understand easily

Well done, thanks for sharing this!

I don't do civil or concrete, but my bet as an electrical engineer with a materials background: Best anchor: welded to the steel reinforcement or glued to whatever other reinforcement. All other anchors subject concrete to tension.

Great presentation. Thank you!

I didn't learn anything new. That has me relieved because I studied this shit too 😂 (other than the available software that was nice) Great presentation!

Props to whoever made the animated illustrations.

Excellent video! We highly recommend post installed anchor bolts with chemicals as epoxy grout. Thanks for your video.

Great explanation. Don't forget cleanliness of the hole. Gotta blow it out....

Greatly explained, please next explain how adhesive anchorage are tested, and the parameters. +1❤️

Thank you for sharing this wonderful video.

Neatly explained ! Thank you

Thanks again for practical information.

I appreciate this information. Thank you.

Excellent presentation

this channel is gold

very detailed. thank you!

We had flexible anchors bedded into the concrete in a cone, as the concrete around it hardened the bolt was waggled so it remained flexible. When the pilar was introduced the anchors would move according to the finished position of the pillar. The pillar was fixed with one nut under it and two above, that allowed the introduction of a grout to fill all the gaps through a pre-drilled hole in the base. These were used as the mounts for a 275kv, S&C mod 2020 switch disconnector.

I have no need for this knowledge but I enjoyed learning it.

Great video, I have noticed recently from using the new tapcon bolt system that there’s not a lot of resistance, in the install process and the diameter of the hole they recommend you to drill has everything in the world to do with that. This manufacture is hesitant to create a tighter fit because of The possibility of the bolt shearing off because probably they don’t use a good quality metal behind their product.

Love the aesthetic. Beautiful. Licensed civil engineer here.

Great video, Thank you!

Thank you. Please make more videos.

I have had to reattach several handrails that had broken the corner off the concrete. I drilled and installed some direct into concrete screws into the remaining good concrete. I also drill into the remaining and use either drop in anchors or wedge type anchors with coupling nuts and all thread to come up thru the replacement pour. So I am anchoring the hand rails deeper and the screws sticking up give the pour something to bite onto better. I dont always have the option to redo it with new stairs or slabs.

The Engineers on Boston's Big Dig learned the hard way about proper anchoring. That's why I don't like using adhesives. At least not on suspended loads. You have to understand creep and make sure you selected not only the proper adhesive, but also educate the contractor who will be using it as well. Dust that isn't cleaned out of drill holes is a big problem with adhesives. Especially when the anchors are installed on a suspended concrete panel weighing over 50 tons. They killed one and injured another in a car that was driving through the tunnel, and it was all due to creep. That kind of thing should not happen. Simple errors can and will lead to disaster, followed by a failure analysis contractor going through your designs with a fine tooth comb.

Thank you for the educational information video.

I have no need to know this, but now I do. Much obliged!

I'm just a homeowner diy-er and was looking for which anchors i should buy for my aluminum pergola and i ran into this video....my head just exploded. Now I'll never be too sure in the way i install this pergola 😅 Awesome video though. 2 thumbs up!

Awesome video

More concrete videos ..I subscribed and notification Bell's to see if you have more in future

Thanks for the video....Peikko Designer also great to use for designing fasteners and its free.

great work

Wow great info on anchors! BTW, software is an uncountable noun, as in it can't end in a plural.

Great video bro👍🙏

very interesting.

Pretty good, can you do one with forklifts hitting posts/ guards/ floor guards? Using different sizes and types of lifts? From typical sitdowns all the way to the bigger turrent style?

Good channel!

Thank you!

Sometimes you think you know, but you don't. Great Video.

Recently we had a course for exactly this topic. It was done by Fischer, a German company which is very known in germany. At first we though; what could possibly go wrong when you set an anchor. Man were we wrong. It lasted about 3 days with theory and practical work and was really informative. At the end there was even a small test to become certified. What is also REALLY important is the materials you use outdoors. Stainless Steel is sometimes not enough to prevent rust from entering the material of the anchor. And if you live near a Coast with salt water you should really invest in even better materials or it could corrode over time. The material for your anchor should always be better than what you fasten. If you want to fasten something galvanized your anchor should be made from stainless steel

The most failure you get with the ones you screw in directly into the concret. If the temperatur gets low it gets even worse. Hit ancor sometimes locked lose. They went into the drilled hole. The concrete sometimes has air gaps are non rebar or less cement. So the anchor locked in the hole. But didnt get a grip. He turn till eternity. The glued ones are the strongest ones. If you clean the hole properly with a pump. Also it takes the most time to set, and fasten the grip. Normal temperatur 20-25 degree is 15 Minutes, 5-10 degree is 3-5 hours. We use them to fix robots and heavy maschines to the ground wall or ceiling. If you have full material you can use Glaspatronen/capilar anchor. 😂😂😂 plase some in the hole and drill a screw,bolt or thread through. That will mix two chemical components. That will react and create a hold.

Thank you.

Great video, I'm going to make my coworkers watch it.

how do you do your animations? I like the coffee color background and the font and would like to make my own notes look like that.

Apparently most of this program didnt provide the stiffener, using built up stiffener to reduce arm length from anchor to flange could significantly reduce plate thickness. I suggest calculate it using plate yielding when it comes to optimized plate thickness

I'm going to start installing anchors properly =D

Thank you

Good video- focuses on teaching you HOW to think about the subject, not WHAT to think.

With increasing popularity of the home shop car lift that is retrofit bolt down installation, people really need to do some research. A two leg lift hoisting a 5000 vehicle 5' in the air is going to present a lot of prying force. Coupled with often unknown concrete conditions and it's all coming down

Can the heat/speed from the drill have any effect?

I'm using Peikko Designer. Very good software

one thing to consider is what conditions the structure will be subjected to as external degradation. the most common being are you anywhere near salt water or when annual frost thaw is prevalent.

How do they account for quality control in the metal and concrete? Are there some statistical analysis(fudge factor) built into the engineering calculations for less than average quality metal or concrete? Also, has non-destructive testing of metal and concrete changed with new technologies? My dad was an engineer and they had x-ray contractors come in at night to X-ray the welds on pressure vessels. Neat stuff to think about.

An important inspection criteria seemingly missed here is anchor hole perpendicularity (skew). If >5degs, expected cone (at failure) becomes significantly less. The calculated strength is no longer valid.

What’s your animation software?

I used skyciv for designing baseplates and connection plates

Nice!

What a bunch of nerds! Love it.

Back in my boilermaker days doing Field construction I got excellent results from hilti Anker products. Dispite the plant guys hitting the beam Anker's with the forks on they're fork trucks

Thank you for interesting topic! Do you know what a program used by engineers at 06:20?

that's awesome

jackhammering concrete with jackhammer, you space your holes so to take advantage of the spall that occurs when you punch a hole through it, just like a bullet, it pushed out a cone on the bottom end, catch that cone and its easier to break as you go, go beyond the cone of spall, then your going through the entire slab again and again. the difference between working hard and making progress and just plain working hard.

03:52 would you mind telling me how that hole in the concrete was made conical and bigger at the bottom? edit : because that is my problem,the hole cannot be made bigger at te bottom : in dynamic cases,like solar panels on the roof,the wind is constantly pushing and pulling,grinding down the bottom feathers of the anchor,and it becomes loose; i have repaired them, such that in some cases i could just pull them out with pliers; any solution for that? *(wow, i was just thinking now that i could pour 2 part epoxy down the hole prior to insertion of the anchor,maybe ?! or is there maybe a better adhesive? in other words,a combination of both bonding and expansion?)*

I'm having difficulty finding out if the anchors I purchased for my car lift are right. I have purchased 14 Hilti HIT-ZR stainless steel anchors bolts size 3/4"x9 3/4" long. My concrete is 8 inches deep with rebar, 4000 psi concrete, and fiber strand added to concrete. Anyway, I want to use them with the Hilti HY-200R adhesive. The Challenger lift company sell ANKR-RITE wedge anchors with the lift. I've read a lot of negative reviews on wedge anchors. I've read chemical anchors are the way to go. How can I figure out if the Hilti Anchors are acceptable for my application?

2:28 This might be a silly question. But for the fastener to bend to the left like that the little broken bit of concrete on the left appears to be compressed, i.e. occupy a smaller volume then before. Can concrete do that? And if it does, what sort of forces are we looking at?

Please let me know which program you used to create these illustrations. ❤

I always see handrail anchors breaking out the edges of concrete... Could this be a freeze thaw issue as well in colder climates? If you used an epoxy anchor system would this prevent water and ice from freeze thaw integration?

5:42 I don't understand how prying force is amplified by a factor of 16? where you get that from?

How shall we repair this type of failure as Concrete Breakout because of anchoring near the edge ? Grouting is enough or not ? also I want toknow how much is the minimum distance between the anchor bolt and the edge ? Thank you for your response

Here we also have FIXPERIENCE by Fischer.