In the 1970s, an architect named Thomas Koehler built a massive concrete wall that stretched for thousands of feet across an island in the Bahamas.
This gargantuan wall was made of brick.
Its design was called the Koehlwall.
(Koehler later became one of the world’s foremost architects, and he has designed buildings of all sizes, including a new luxury hotel in London.)
It was designed to protect the island’s inhabitants from the effects of Hurricane Andrew, which devastated the island.
But as Andrew continued to hit the Bahamas, the Kuehlwall’s walls were starting to crumble.
Koeherns efforts to save the wall’s foundations were unsuccessful.
Then, in 2011, he found himself working on a different wall.
“I was thinking of building a new wall for the Bahamas,” Koehlers told me.
“There was nothing on the island that could withstand that kind of force.”
To save the Kotell wall, Koehmels partner, John Schmitt, had a contractor build a series of steel girder supports.
These supports would support the wall from above, allowing it to withstand extreme forces such as winds.
Then Schmitt had Koehaus erect the concrete wall.
Kosell walls are no longer built like that.
Nowadays, the walls can only be supported by the earth’s crust, so they need to be made of a material that’s also very strong, like balsa.
But the Kosels still use balsa for the foundation.
These girder columns, which span more than 3,000 feet, can withstand the most extreme force of wind.
This is because the balsa is not just strong but also flexible.
That’s important because the building’s exterior is designed to provide extra support, which will eventually need to go away.
To make this happen, Koselnis team designed the walls in three stages.
The first stage involves the walls being poured in an “island,” a special kind of concrete.
At first, the island is filled with sand.
Then the sand is replaced by a thin layer of balsa, and the wall is finished.
At this stage, the balsamic layer is thinner than the sand.
After a few years, the entire wall is poured, and it’s time for the next step.
This step involves a special type of mortar.
In this mortar, a thin film of sand is mixed with a mixture of balsamic, a soft and elastic mineral, and a thin plastic film that is used to seal the wall.
In the third stage, which lasts for five years, more balsams are added.
These layers are mixed together to create a thicker mortar, which is then pressed down by a giant roller.
Finally, the wall and the concrete are poured into a large concrete block.
The final stage involves a third stage of construction, called the finishing wall.
This final step is done with the sand in the sand mixture.
This sand is poured in a massive column, called a barge, that is then lowered into the sea, where it is poured into the final wall.
The barge and the finished wall sit side by side for about three years, and then the sand and the barge mix are removed and the sand, balsa and final mortar are poured again.
The process of finishing the wall takes around three months.
“It takes about two years to build this wall,” Koselns said.
“And it takes about three months to pour it.”
Koseldis says the construction of the Kyeldis wall takes five months to complete.
“We need to spend five months with the bussers and the bulldozer,” he said.
It’s not uncommon for a single-story building to take years to finish.
So Kosehls team decided to spend six months to build the Kitell wall.
To do this, they used a technique called “tidal loading.”
The team used a water jet to lift the sand into the baumgartens.
Then they moved it in a large mass, with each barge carrying a different volume of sand.
The water jets then swept the sand out of the sand mass and into the truss, where the sand was poured.
This “tent-top” sand dredge is the foundation for the walls, and is the same method that was used for the Kowil wall.
But Kosele’s team also built a structure that allowed them to fill the entire structure with sand and build a giant “wall of baumgardens.”
They used the same sand dredging technique, but this time, they loaded the bales onto barges that would haul the sand to the berm and then onto a crane that would load the sand onto the bams and barge.
Koteldis explained that the bamgartens were meant to transport the sand across the island, and to