Burj Khalifa Building Structure

Burj Khalifa features a buttressed core structural system with a Y-shaped floor plan that enhances stability against wind and seismic forces.

Core Design
The hexagonal central core, reinforced with concrete, supports three wings that spiral upward, reducing wind loads through setbacks at 26 levels.
This design distributes loads efficiently, with perimeter columns and corridor walls acting as buttresses.

The cutaway diagram illustrates the Y-shaped plan, core, wings, and foundation integration.
Foundation and Materials

A 3.7-meter-thick reinforced concrete mat, supported by 200 large and 650 small bored piles driven 50 meters deep, anchors the 500,000-ton structure.

High-strength concrete (up to 80 MPa) and 4,000 tonnes of steel form the spire, jacked hydraulically into place.

Key Engineering Features
High-performance glass-aluminum cladding resists Dubai's heat and winds, while 57 elevators serve 163 floors up to 828 meters.

The spiraling form draws from Islamic architecture, optimizing space for residences, hotels, and offices.

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