They didn't use a helicopter. They built it from the inside out .
The Burj gets struck by lightning roughly 10 to 15 times a year. The spire is clad in a specific alloy designed to act as a giant Faraday cage. It takes the millions of volts of electricity from a lightning strike and channels it safely down the core of the building to the ground, keeping the electronics and residents safe. burj khalifa spire
To visualize that: The spire alone is taller than the Washington Monument (169m). It is taller than the entire Great Pyramid of Giza (138m). If you lifted the spire off the Burj and stood it on the ground in London, it would dwarf Big Ben. Here is the engineering nightmare: How do you install a 200-meter steel needle on top of a tower that is already swaying in the wind? They didn't use a helicopter
The Burj’s spire is technically a sitting on top of the concrete core. The spire is clad in a specific alloy
When you look at a picture of the Burj Khalifa, your eye naturally travels up the sleek, stepped façade until it pierces the clouds. We all know the number: 828 meters (2,717 feet) . But here is a truth that surprises most people: without its spire, the Burj Khalifa would barely be taller than the Empire State Building.