At 829.8 meters tall, the Burj Khalifa building in downtown Dubai is the tallest man-made structure in the world. The building totaled 7 Guinness World Records including Tallest Building(828.5m), Tallest Man-made Structure on Land(828.5m), Highest Residential Apartments(385m), Most Floors in a Building(160), Highest Restaurant From Ground Level(441m), Tallest Elevator(504m), and Highest Observation Deck(555.7).
The tower uses a bundled tube design which utilized about half the amount of steel that the Empire State Building used. The engineers had to develop a new structural system, they called the buttressed core, to support the buildings extraordinary height. The buttressed core is a hexagonal core that is reinforced by three buttresses that make a ‘Y’ shape. This system keeps the building from twisting and allows the tower to support itself laterally.
The spire on top of The Burj Khalifa took more than 4,000 tons of structural steel to complete. Engineers built the central spire inside the building and used a strand jack system to lift it over 200 m.
Watch the Guinness World Records video here: World’s Tallest Building