If like to see more explosion stuff go check Pommijätkät KZfaq channel kzfaq.info/love/r1cNqiNxK46w93zw9KfTLg and if you want to learn more about concrete stuff check out Perustava KZfaq channel kzfaq.info/love/gooHpBSNYX-CSUxTUxeuYQ

“Everyone in Finland has hand grenade” *Russians start sweating*

Never seen a better commercial for concrete walls...

I feel like that first explosion was a good demonstration of how a grenade would disperse its energy when tossed into like a bunker or trench, those things really pack a bigger punch than they make them out to.

Seeing you guys go under that concrete ROOF after it taking beating after beating, was like going through a stress simulator.

As a Swede this is exactly what I thought the Finish where doing during lockdown

Everybody gangsta till you hear in a distance: _kolme, kaksi, yksi..._

This was super entertaining! Love all the one liners! "Everyone in Finland has hand grenade." 😂 "So a bit like Finish pressure washer." 😂

Love the way they cover the whole thing with a big slab of concrete that they stand under after each explosion

The typo in "Prober safety planning" in the disclaimer just makes the video 20% more finnish

Military: Uses money and time to research how to breach a wall Some finnish guy: Jerry can and C4

These Finns are hilarious!! With what little demolitions training I received in the infantry, I think the results were pretty much as expected. Another thing I’ve learned is that we have a lot of Finns here in Northern Ontario and, for some strange reason, their accents are more understandable in a sauna.

Reinforced concrete is amazing stuff... I had a structural engineer once tell me that, given the advancements in earthquake-frequented zones over the past century and a half, we can expect some of our skyscrapers to last thousands of years before weather wears them down. Here's an example of why.

Disclaimer: "These are trained professionals, don't try this yourself" Trained professionals: "We wrapped some det-cord around a bottle... IDK"

I like how they just casually make and use I.E.Ds

I was once privileged to observe the demolition of a thin (5" thick) concrete bridge deck slab, from a damaged bridge with a washed-out abutment. The slab had so much reinforcing in it that, even though it had a 45-degree twist along its length, there were no visible cracks. The thinner the slab the more difficult it is, because the blast just blows a hole and escapes into thin air. The contractor had a free supply of time-expired Anzomex boosters (TNT + PETN). These were maybe an inch and a half diameter and a couple of inches long. So he drilled strings of holes about 4" centres, inserted and fired the charges, and it cut the slab into neat six-foot squares of concrete joined by the reinforcing which he then cut with a gas axe. Notably, the steel reinforcing wasn't damaged by the blast at all, though the concrete was neatly removed from around and between it.

Concrete is really good at taking pressure, but pretty weak against being ripped apart, that's why the inner side takes little damage (compression) and the outer side rips away

"This concrete wall may attack at any time, so we must deal with it."

2 kilograms of c4 later: "Concrete is really hard." Glad we got that cleared up.

There is a term for the effect of the shaped charge. When the explosive causes almost no damage to the surface it touches, but sends shockwaves through the material and causes shrapnel on the other side is known as "spalling".

This is the *pinnacle* of backyard science!! And I absolutely love it! Thank you for being the base individuals you are!

USA government: "and how did you learn to create improvised breach charges? random citizen now on several watch lists: "the Finnish taught me"

they make it seem much easier in the movies

The damage on the other side of the concrete wall is from what is called spalling, and it works exactly the way you describe. That's actually why tanks have anti-spalling fabric on the inside of the armor; early anti-tank weaponry caused most of its blast-only damage that way.

For anyone wondering, The reason the explosion isn't huge and slow, Is because those types of explosions are typically used in movies, for dramatic effect. Explosions like these, are essentially for military use. And because of that; require a fast detonation to acquire a fast shockwave. And the reason is; More damage, etc.

I feel like Finnish people are the only ones who can literally blow shit up and still give of such a wholesome vibe.

When you hear the accent, you somehow instantly believe that everything was safe

the soothing and relaxing accent they have have forced me to add this to my asmr playlist.

During the first explosion with the handgrenade it really puts into perspective how much punch such a small object can deal, I mean it isnt any larger than an apple but it would still wipe an enemy-infested room clean in under a second. Now my next question is why I cant just get a block of C4 in sweden... for uhhh... "research purposes"

"Rick, where'd you get a hand grenade?" "Everyone in Finland has hand grenade."

“Don’t try this at home” Yes because I just casually have C4 laying around my house....

Great video. I learnt a lot about explosives, walls and pressure washing. It was a pleasure to watch.

Thanks for the video. I learned something valuable today. Both thumbs up !!

“How much explosives are required to blow through a concrete wall?” *Stands behind concrete wall*

If I didn't see it on camera, I wouldn't believe that 3 unrelated Fins would stand this close to each other

Fantastic video. Thank you

Love it - what a lot of fun you three had.. I especially liked the "Finnish Pressure Washer" joke!LOL!

Bank of Finland is robbed. Police: all we found was hydraulic oil

“How do I break concrete?” Google: use a jack hammer or similar construction tools Bing:

Thanks for the tutorial! This is going to be very useful later

This was absolutely awesome! I loved every little bit of this video.

"there's two schools of thought, internet and actual knowledge of explosives" i already know i'll love this

Dont use explosives at home... duh.. go to a friends house.

This is full on really good help for my writing, thanks!

It'd be more expensive but you should really do each test on a fresh wall because each explosion causes stress cracks so it gets weaker after each test. but still cool watching it :D

Puts a directed charge on a bottle of water, calls it "Finnish pressure washer" LOL

"or the wall is going to be really clean" you got jokes for days, I love y'all's sense of humor thank you for bringing some smiles into my day.

I'm glad to see you put up an overhanging slab of concrete, that's very smart and safety conscious of you.

Most people: "Using multiple explosives on the same wall doesn't give an accurate test." Me: : "Ha Ha Things Go BOOM!"

the best part of the hydraulic press will always be the finglish. If you see 4 errors in one sentence, you feel like you are with experts!

Lighthearted presentation and I learned something new, good job.

thank you! will use this information "wisely"

"there is going to be hole, or wall is going to be extremely clean" lost it. Entire video worth it.

Finland: Everyone has a hand grenade at home. Russia: not going to lose again.

First time to see your show!!! Bro!!!your show is the best ever,I like your humor. Does everyone in Finland really have grenades ?hahahah.

Very informative video, thank you !

Explosives specialists: explosives are dangerous. Don't do this at home. Random guy with a pound of tannerite: *giggles*

I was trained in demolitions 32 years ago in the army. Both my memory and math are rusty, but I believe that the breaching charge formula for TNT is P = R(cubed)KC where P equals pounds of TNT to use, R is the radius (thickness) of the concrete, K is the material factor (reinforced concrete is 1.76 for a foot thick wall and .96 for a two-foot thick wall) and C is the tamping factor. To breach a fortification that is 1/3 of a meter (1ft) thick with a resulting hole large enough for men to pass through, even though the wall is only a foot thick, you need a hole that has a diameter of about 4ft. so you need to double the R to get a two foot radius around the blast. 2 cubed is 8. As I said, the K factor for more than one foot but less than 3 feet of reinforced concrete is .96 therefore 8 X .96 is 7.68. Now you have to decide on the tamping and placement method. If you're going to place the charge against a flat wall like that, and you hope for a hole that is 4ft. in diameter, you have to place the charge half the radius of the desired breach above the ground at the 2ft. point and then consider the tamping factor. An elevated un-tamped charge for a 1ft. thick reinforced concrete wall is 1.8, so 17.68 X 1.8 tells you that you need a TNT charge of 13.824. You then round that up to the next pound or 14. So, if you don't intend to tamp it, you need a charge of 14 pounds of TNT elevated at two feet above the wall and placed against the surface of the wall. That's about two regular-sized satchel charges. If it were me, I'd probably split that into two 7 pound charges because I'm only trying to breach 12-inches of concrete. If I place one charge at about 18 inches above the ground and another at 36 inches I should be able to get full penetration and end up with an opening 4ft by 4ft. Then, once you've breached the wall, you have to deal with the rebar, because the TNT will not defeat the rebar. At that point, it would be necessary to use either a metal-cutting torch or metal-cutting charges on any rebar within a 270 degree arc of that circle in order to be able to bend the rebar out of the hole so one can pass through. Don't try this at home. In fact, don't try this at all unless/until you check those figures with a demo expert, because my demo math skills are 32 years rusty and I personally wouldn't trust them without having them confirmed by another demo guy.

Great video guys!!! Always love the explosive videos!!!

This is pure comedy brilliance, it had me laughing out loud all the way through! "I have no idea what it's going to do. There will be hole, or wall is going to be extremely clean, two options!" 🤣

The effect where the back side of the concrete breaks and flies off even though there's no hole is called "spalling". It's caused by pressure waves inside the concrete bouncing around and interacting; when two waves meet in the right way, it creates an area where the concrete is "stretched" further than it can withstand, causing fragmentation of the material. An interesting related fact is that the spalling effect is a consideration in the design of armor for tanks and other vehicles. Incomplete penetrations and explosions can cause spalling on the other side the the armor, creating a shotgun-like blast that can injure personnel and damage equipment. In fact, there are munitions created specifically to take advantage of spalling! Because of this, many armored vehicles have layers of material such as Kevlar lining the inside of the armor, in order to catch the spall fragments.

This is why the Finish are the happiest people in the world for the fourth year in a row.

Honestly good campaign promotion for the concrete company that made the structure

I knew the last one would penetrate. You could get the same effect by packing it with thick mud. Good demo!

Everyone: No the water jug and C4 isn't not going to work. Lauri: I reject your reality and substitute my own.

My dad is a retired miner and he said back in the day they just guesstimated the amount of explosives for a job and dudes would come into work drunk all the time. Fucking crazy times LOL

Thanks for the info.

Love it! Great work coming from an old Breacher!

I have no idea why yt recommended this but my monkey brain enjoyed the explosion

ATF attempts to enter chat: blocked by Nord VPN.

The audio of the explosion was perfect!!

This KZfaq channel is very good. The content you produce is very good.

Americans watching this while he says stuff in inches: I see nothing wrong Metric country people knowing Finland is metric: _wat the fook_

Asking the internet if they would like to see more explosions....... What a silly question.

My house is currently being constructed with these exact walls, ceilings/floors will be heavily reinforced as well. My basement also has two floors of reinforced concrete too. Very glad I chose this instead of brick.

you guys are great! thanks!

“There is either going to be hole, or the vall is going to be a really clean.” LOL

There's actually a breaching charge designed to break through solid concrete walls, it's called the concrete charge (duh) the hard part is dealing with rebar reinforcement because the c-4 shatters the concrete and makes it crack, but it also keeps the c-4 away from the steel bars. To blow through steel the c-4 needs to be in direct contact with the steel to cut it. So reinforced concrete walls are hard to blow a hole through because the rebar reinforcement will still be untouched

Thanks, I really needed that

You people are hilarious! Love the video & now I know what a Finish water pressure water is.

And this kids is why throwing grenades at tanks in battlefield doesn't do much lol.

"We have two schools of thought: Lauri with the Internet, and Henri with the knowledge of explosives." And we, the audience, have another fine example of priceless Finnish deadpan humour.

San Diego says you guys are awesome and funny too.great job good info thanks

4:55 I threw my Nokia 3310 against that wall.

" An ordnance technician at a dead run outranks everybody." - Maxim #3

KZfaq: You want to see some Finns trying to blow up a wall?

Fascinating exercise!! Thank you all!!

The dent you made in the water jug was VERY important because it shaped the energy. Without the dent, much more of the energy would have dissipated perpendicular to the direction of penetration.

That was a fantastic video! You should've have a full size mannequin on the opposite side of the wall. :-)

“I use a water bottle, not a pepsi bottle, that would have been cheating” because of things like these i love Lauri and Anni

Awesome video thanks for sharing.

Gentlemen and lady, many thanks for your time and effort making this video.

"it's kinda like Finnish pressure washer. " I threw myself away at that one

you can tell they know what they’re doing by the hard hats, safety glasses and accents

You guys sound Finnish... Tervetuloa... Loved my 11 months up there.. a long way from New Zealand.. Great video..

4:58 that effect is used in tank ammo, it isnt used a lot anymore but the projectile is made out of a plastic explosive which hits the target first and spreads out until the fuze at the back hits the target too. (Its called HESH)

I tried this at home. Let's just say the landlord is somewhat irate.

Don't do this at home *Gives exact instructions on how to build it*

The effect from the meal rod is called "spalling" - basically the effect of the preservation of energy (speed x mass), with the outer layer of concrete trying to "flay away" to keep the speed-mass-product constant...

"The Wet Fart" ! Hilarious. btw - I believe the Shaped Charge would have also benefited from having a water jug behind it. It likely would have benefited if it were attached in a more rigid fashion. As it was, the explosive was pretty much free to push in all directions from the instance of ignition. Having some resistance to hold it in place while that initiates a directional force (the direction with the least initial resistance) would have enabled the shape charge to blast the wall and cut rebar if placed in the right location to hit the rebar.