Saudi Arabia's building the new tallest building in the World.
The Jeddah Tower.
3,280 Feet tall. 200 floors. Wow!
The Liberty Tower in NYC is 1,776 feet tall and 104 floors.
"Constructing it will require about 5.7 million square feet of concrete and 80,000 tons of steel"
"Building a structure that tall, particularly on the coast, where saltwater could potentially damage it, is no easy feat. The foundations, which will be 200 feet (60 meters) deep, need to be able to withstand the saltwater of the nearby ocean. As a result, Advanced Construction Technology Services will test the strength of different concretes."
"Wind load is another issue for buildings of this magnitude. To counter this challenge, the tower will change shape regularly."
"Because it changes shape every few floors, the wind loads go round the building and won't be as extreme as on a really solid block,"
"Delivering the concrete to higher floors will also be a challenge. Possibly, engineers could use similar methods to those employed when building the Burj Khalifa; 6 million cubic feet of concrete was pushed through a single pump, usually at night when temperatures were low enough to ensure that it would set."