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.
Wind tunnel testing shaped the spire to reduce lateral sway. burj khalifa spire
The Burj Khalifa’s spire helps mitigate this. Combined with the building’s "confused" shape (which spirals as it rises), the spire prevents the wind from organizing into dangerous patterns. While the main tower does the heavy lifting of disrupting wind vortices, the spire acts as a stabilizer for the very top of the structure. To visualize that: The spire alone is taller
Functions as a primary navigational marker for Dubai International Airport. Communication Hub Houses powerful telecommunications antennae. Wind tunnel testing shaped the spire to reduce lateral sway