Burj — Khalifa Spire =link=

The is a massive 4,000-tonne structural steel crown that serves as the world's tallest building's finishing touch. Standing at a height of 828 meters (2,717 feet), the tower's spire alone accounts for more than 200 meters of its total height. While it houses vital communication and aircraft warning systems, the Council on Tall Buildings and Urban Habitat describes it as "vanity height" because it contains very little usable floor space. Engineering and Construction

Engineers used a hydraulic jacking system hidden inside the building’s core. They built the spire in sections, and like a periscope rising from a submarine, they pushed the spire up piece by piece from within the building. For the final 80 meters, they had to fabricate the steel on site and weld it manually—standing on a platform 750 meters above the ground. burj khalifa spire

A Tuned Mass Damper (TMD) is installed inside to counteract oscillation. The Masterclass Construction Process The is a massive 4,000-tonne structural steel crown

How tall do you think a building can actually get before a steel spire isn't enough? Let me know in the comments below. A Tuned Mass Damper (TMD) is installed inside