Originally designed by:- The Dolos was designed in 1963 by a South African harbour draughtsman Aubrey Kruger, and were first used on the breakwater in East London, a South African port city. They work by dissipating, rather than blocking, the energy of waves. The Xblocks are based on Krugers design.

@clivesymons853

Жыл бұрын

I was waiting for them to mention that?

@reonvanwijk

Жыл бұрын

Kruger took inspiration from the configuration of spinal column bones. Legend has it that he was eating lunch at work, which consisted of ‘leftover’ oxtail stew. The design is ingenious in that the more the waves move the Dolos the tighter they interlock. He was originally working on a design to build a safe harbour for resettlement of the island of Tristan da Cunha after the devastating volcanic eruption that destroyed the original settlement on the island. He received no royalty for his design since he was working for the government harbours department. The design was not patented and was freely available for others to subsequently copy over the decades.

@tomsreviews238

Жыл бұрын

I am from NJ and they refurbished one of the main inlets with dolos back in the 1970s and they haven't moved an inch since then. I believe they used them prior to that on the US West coast.

@nfwolfaardt

Жыл бұрын

The patent actually went to a French engineer in 1950... the Americans copied it in '59, the British copied it in '61, the Dutch in '62 and Kruger in '63... each one just shaped it to their own design.

@williamgibb5557

Жыл бұрын

Years ago in Ocean City,NJ, they made the jetty very tightly to nearly stop the water flow along the beach. This in turn created an edy effect that washed the beach away on the back side. Secret is to slow the wave action and not try to stop it completely .

The tetrapods remind me of anti tank blocks used in WW2 , very interesting video thankyou !.

You produce absolutely awesome videos. Interesting, well thought out, professionally made. Keep up the great work. I always look forward to your new releases 😊

Invented in south africa. Thank you

Thanks for sharing this teaching with us, I learned a lot.

Keep those awesome videos coming nice work thank you

Kruger took inspiration from the configuration of spinal column bones. Legend has it that he was eating lunch at work, which consisted of ‘leftover’ oxtail stew. The design is ingenious in that the more the waves move the Dolos the tighter they interlock. He was originally working on a design to build a safe harbour for resettlement of the island of Tristan da Cunha after the devastating volcanic eruption that destroyed the original settlement on the island. He received no royalty for his design since he was working for the government harbours department. The design was not patented and was freely available for others to subsequently copy over the decades. Re: Wiki - ‘The dolos was invented in 1963, and was first deployed in 1964 on the breakwater of East London, a South African port city.’

@moosesnWoop

Жыл бұрын

I heard it was inspired by black jacks

Excellent programs thank you and happy Easter

Very interesting! 👏🏻👏🏻👏🏻

Muchas gracias!

Thanks for interesting videos give more knowledge Water Breaker also known as (TETRAPODS) unfamiliar.

bom trabalho amigo

What about using those TetraPods off the FL coast (etc) to slow down waves and such from hurricanes?

@mattharper588

Жыл бұрын

I’m not a scientist or very smart person but I winter in Texas and Florida and the most damage from hurricanes is the wind

@VAMobMember

Жыл бұрын

@@mattharper588 mid-Atlantic Agree wind is bad but last two to hit FL had HUGE flood damage according to national news media

Amazing

Sea it’s always beautiful 😍

@donbrashsux

Жыл бұрын

Except for all the staggering rubbish floating in it

Biggest fan

@Divingdeeponceagain

Жыл бұрын

Big fan from India

Called them sea jacks when we lived on Okinawa in the early 80’s.

God bless invention found

Is there any rebar used inside the tetrapod?

Best u can see is in Constanta harbor in Romania. 20 t stabilopods. Most efficient stuff against storms.

Can also use as main battle tank barrier

Even better are systems that allow for marine habitat to form under the wave surface. Not only do these then allow for a more natural approach but marine ecosystems are created, and heck, recreational fishers can throw a line out for a catch!

Must be one hell of a pump moving that silt or whatever it is at 5:58

Dolose proudly south african!!!

Tetrapods were invented by a US Navy Civil Engineer Officer. When I was at CEVOS (Civil Engineer Officer School) they told us they were not used. I saw them in use in Rota Spain. Im kind of glad to see them in use in more places now

@joestevens3348

Жыл бұрын

First invented by a South African engineer in 1963 working for the SA Ports authority. Not an American

@sammoore9120

Жыл бұрын

@@joestevens3348 no first invented by a US Naval Civil Engineer in 1956.

@joestevens3348

Жыл бұрын

Prove it!

@reonvanwijk

Жыл бұрын

My mother, who is 94, worked with Aubrey Kruger in the same harbour drawing office in South Africa. See my comment on the inspiration for the design. It is pretty common knowledge in engineering circles that Aubrey Kruger formulated the original concept.

@sammoore9120

Жыл бұрын

@@reonvanwijk it is not my fault that Audray decided to copy a US Navy design. But regardless of who invented it, it is ineffective

Deben de colocarlos en Corwall para no perder el casco historico x las tormentas....

Invented by a South African.

@diogeneslantern18

Жыл бұрын

The Dolos is a SA invention, but the first design in question is a tetrapod. The only time a Dolos is shown is at 2:30

I wonder how much each one costs.

The first time I saw those thinks was in GTA V behind the airport. 😮

@TopAhmed1

Жыл бұрын

I saw them in parkour videos someone jumping on them

Hey brutha Nz in the house

What was that black stuff mixed with water at 6 mins?

Looks like big caltrops

these concrete interlockers were invented in South Africa

How come the concrete molds are not reinforced with rebar? Isn’t concrete weak without rebar?

@wolverines5279

Жыл бұрын

Its more or less a yes and a no problem with rebar is that it degrades the concrete sooner

@BariumCobaltNitrog3n

Жыл бұрын

Rebar is used in bridges, buildings, skyscrapers, homes, warehouses, and foundations to increase the strength of a concrete structure. Rebar is not necessary for every concrete project. It can corrode easily when exposed to water or air, and so significantly reduces the lifespan.

@reonvanwijk

Жыл бұрын

Concrete in isolation is good at resisting compressive forces. Rebar is used used in concrete to resist tension, bending moment and shear. These are forces experienced typically where concrete has to span a distance/opening. In this instance concrete is being used primarily for mass and is acting in compression. As others have written. In certain instances rebar reacts negatively to the atmosphere and corrodes and expands, which results in more damage than enhancement to the structure. This negative corrosive reaction would be massively multiplied in a salt water environment.

Hail tetrapod

The coast lost the flower, it was not the coast!

😱

another example of how our race is using tech and know how to control our environment and tame nature

The design is pretty bad, the iron hook on top is just extra part to be attached, better is to use a mold shape that would form a spot where it could be lifted. When this iron rusts off, it becomes very difficult to lift.

@reonvanwijk

Жыл бұрын

Once lifted and dropped into place, they will never be moved again. The steel lifting hoop is considered sacrificial and redundant once the unit is positioned.

You say tetrapod but show dolos more than tetrapod😅

They were used since the 60s in Romania by the communists you can see them in Constanta in the ports. Still work today

😢

yeah dont eat bacon or pork

Not very informative.

@post10