On the evening of January 4, 2010, in the heart of Downtown Dubai, Sheikh Mohammed bin Rashid Al Maktoum, the ruler of Dubai, stepped to a podium before a crowd of thousands and made two announcements that the world had been waiting for. The first was that the tower rising 828 meters into the Arabian sky, a building that had been the world’s tallest structure since September 2008 and whose exact height had been kept a closely guarded secret throughout construction, was now officially open. The second announcement was a surprise: the building would not be called Burj Dubai, the name under which it had been known since construction began in 2004. It would be called Burj Khalifa, renamed in honor of Sheikh Khalifa bin Zayed Al Nahyan, the President of the United Arab Emirates and ruler of Abu Dhabi, whose financial support had helped ensure the project’s completion during the worst global economic crisis in a generation.
The fireworks that followed the announcement lit up the Dubai sky in a display that was broadcast live around the world. The Burj Khalifa had opened. At 829.8 meters, or 2,722 feet, it was more than twice the height of the Empire State Building, nearly three times the height of the Eiffel Tower, and approximately 320 meters taller than the next tallest completed building on earth. It was, and as of this writing remains, the tallest structure ever built by human beings.
Dubai’s Ambition and the Origins of the World’s Tallest Building
To understand why Dubai built the Burj Khalifa, it is necessary to understand what Dubai was trying to become in the early years of the twenty-first century.
Dubai is one of seven emirates that together form the United Arab Emirates, a federation established in 1971. Unlike neighboring Abu Dhabi, which possesses approximately 90 percent of the UAE’s oil reserves, Dubai has relatively modest oil resources that were expected to be significantly depleted within decades. The emirate’s leadership, particularly Sheikh Mohammed bin Rashid Al Maktoum, who became Crown Prince of Dubai in 1995 and has served as its ruler since January 4, 2006 (the same date the Burj Khalifa would eventually open four years later), recognized early that Dubai needed to build a post-oil economy.
The strategy Sheikh Mohammed pursued was to transform Dubai into a global hub for tourism, finance, real estate, and commerce, a city that the world’s wealthy would choose to visit, live in, invest in, and do business in. This strategy required physical symbols of ambition and modernity that would make Dubai’s skyline recognizable to a global audience and that would attract the media attention and international investment that a new global city required. The supertall skyscraper was the most legible symbol of urban ambition available in the early twenty-first century, and Sheikh Mohammed wanted not merely a tall building but the tallest building ever built.
The project was assigned to Emaar Properties, the Dubai-based real estate developer founded in 1997 that was transforming central Dubai through its flagship Downtown Dubai development. Mohamed Ali Alabbar, chairman of Emaar Properties, became the project’s driver on the developer side, overseeing the enormous undertaking and becoming its public face during the years of construction. Alabbar’s statement in March 2009 that office space in the Burj Khalifa had reached $4,000 per square foot captured the extraordinary commercial ambition of the project.
The architectural commission went to Skidmore, Owings and Merrill, the Chicago-based firm with an unparalleled record in supertall building design. SOM had designed the Sears Tower (now Willis Tower) in Chicago, which had held the record as the world’s tallest building from 1973 to 1998. The firm brought to the Burj Khalifa project a depth of knowledge about the engineering and architectural challenges of extreme height that no other firm could match. The lead architect was Adrian Smith, who had been developing the design for what would become the Burj Khalifa since before construction began. The lead structural engineer was Bill Baker, whose innovative engineering solutions made the building’s extraordinary height possible.
The Architecture and Engineering of Unprecedented Height
The design of the Burj Khalifa solved problems that no architect or engineer had ever had to solve before, because no building had ever been proposed at anything approaching its eventual height. The challenges were fundamental: extreme height means extreme wind loads, extreme temperature differentials, extreme structural demands, and extreme logistical complexity in construction.
Adrian Smith drew design inspiration from two sources. The first was traditional Islamic architecture, particularly the geometric patterning systems found in historical Middle Eastern structures. The second was the Hymenocallis flower, also called the spider lily, a desert flower whose petals spiral outward from a central core in a pattern that Smith adapted for the building’s Y-shaped floor plan. The three “petals” of the Y-shaped plan extend outward from a central hexagonal buttressed core, each one set sixty degrees apart, creating a symmetrical form that tapers as it rises in a series of setbacks. By the time the building reaches its upper floors, only the central core remains.
This configuration was not merely aesthetic. Bill Baker’s structural innovation was what he called the “buttressed core” system: the central hexagonal core is reinforced by the three surrounding wings, which resist the twisting and bending forces that wind imposes on a tall building. As Baker explained his approach, the design was specifically intended to “confuse the wind.” By tapering and stepping the building at irregular intervals as it rises, the design prevents the sustained resonant oscillations that can build destructively in uniform structures. Engineers compared the principle to the way a spinning top maintains stability by constantly changing the distribution of its forces. The building sways at its top under high winds, but the sway is controlled and well within safe parameters.
The foundations presented their own extraordinary challenge. The building stands on 192 reinforced concrete piles, each 1.5 meters in diameter and sunk to a depth of approximately 50 meters into the ground. These piles support a reinforced concrete foundation mat nearly 4 meters thick. The soil conditions in Dubai, a coastal city built partly on sand and reclaimed land, made foundation engineering a critical and complex undertaking. The foundation system uses more than 45,000 cubic meters of concrete and was designed to distribute the building’s weight across the maximum possible area.
The concrete used in the construction was itself specially formulated to resist both the extreme compression loads of a building of this height and the extreme heat of the Dubai environment. In summer, surface temperatures in Dubai can exceed 50 degrees Celsius, conditions that can cause conventional concrete mixes to crack and fail. The concrete mix used in the Burj Khalifa was designed to be poured during cooler nighttime hours and includes specific additives to resist thermal expansion. When concrete was pumped to the building’s upper sections, it was pumped to heights exceeding 600 meters, a world record for vertical concrete placement that required specially engineered pump systems.
The Wikipedia article on the Burj Khalifa provides the comprehensive technical specifications of the building, the full construction timeline, and the complete list of world records the building holds across multiple categories.
Construction: Six Years, 12,000 Workers, and 22 Million Hours
Construction of the Burj Khalifa formally began on January 12, 2004. The six years between the first excavation and the official opening on January 4, 2010, involved a logistical effort of enormous scale. At peak construction, approximately 12,000 workers from across the world were on site simultaneously. The total construction effort consumed approximately 22 million man-hours of labor. More than 330,000 cubic meters of concrete and 39,000 tonnes of steel rebar were used in the structure.
The outer cladding of the building, which was designed to withstand both Dubai’s intense summer heat and the forces of high-altitude winds, consists of more than 26,000 hand-cut glass panels along with aluminum and stainless-steel panels, and vertical stainless-steel tubular fins. The cladding team worked downward from the top of the building, completing the exterior skin in stages as the structure reached its full height. The completed exterior was announced on October 1, 2009, three months before the official opening.
The construction process was not without difficulties. In March 2006, approximately 2,500 workers staged a protest over delayed bus service at the end of their shifts, with the demonstration escalating into a riot that damaged approximately £500,000 worth of cars, offices, computers, and construction equipment. The incident drew international attention to the conditions of migrant workers in Dubai’s construction industry, who typically earned low wages, worked in extreme heat, and lived in cramped dormitory accommodations. Human rights organizations documented concerns about debt bondage and passport confiscation among some categories of workers, and the Burj Khalifa project, as the most visible construction project in the world, became a focus point for these broader concerns about the treatment of migrant labor in the Gulf states.
The building passed several notable milestones on its way to completion. In July 2007, it officially surpassed Taipei 101 in Taiwan, then the world’s tallest completed building at 508 meters, to become the tallest standing structure even while still under construction. On September 1, 2008, at a height of 688 meters, it surpassed the Warsaw Radio Mast in Poland, which at 646 meters had been the tallest human-made structure of any kind in the world. On January 17, 2009, the building was topped out at its full height of 829.8 meters, completing the structural framework.
The 2008 Financial Crisis and the Rescue from Abu Dhabi
The construction of the Burj Khalifa unfolded against the backdrop of one of the most turbulent periods in Dubai’s modern history. The emirate had borrowed massively during the early 2000s boom years to fund its extraordinary construction ambitions. Dubai’s total debt for construction projects reached at least $80 billion by some estimates. When the 2008 global financial crisis struck and property values collapsed, Dubai found itself facing a debt crisis that threatened to halt construction projects across the city and potentially default on its obligations.
Abu Dhabi, the wealthiest of the UAE’s seven emirates and the emirate that holds the UAE’s presidency, provided Dubai with the financial lifeline that allowed it to continue functioning. Abu Dhabi lent Dubai tens of billions of dollars, a rescue package that prevented financial collapse but also shifted the political balance between the two most powerful emirates. The decision to rename the building Burj Khalifa, honoring Abu Dhabi’s ruler Sheikh Khalifa bin Zayed Al Nahyan, on the very night of its opening was a public acknowledgment of this financial relationship. The building that Dubai had built as its signature monument was named for the man whose emirate had funded its completion.
The announcement was deliberately kept secret until the opening ceremony. The media representatives invited to preview the observation deck on the morning of January 4 were told nothing about the name change. When Sheikh Mohammed made the announcement that evening during the official opening ceremony, accompanied by a spectacular fireworks display, it was both a revelation and a statement of gratitude.
The Britannica article on the Burj Khalifa covers the building’s architectural design, its engineering innovations, and the political and financial context of its naming and opening.
What the Burj Khalifa Contains: A Vertical City Above the Desert
The Burj Khalifa is not simply a tower: it is, as its developers described it, a vertical city. Its 163 floors contain a staggering range of uses arranged through a carefully organized vertical zoning plan.
The lower floors, from the concourse level through the eighth floor, and then floors 38 and 39, house the Armani Hotel Dubai. This is the world’s first hotel designed and developed by Giorgio Armani, the Italian fashion designer, who was commissioned to create the interior environment for a hotel that matched the building’s aesthetic ambition. Above the hotel floors, levels 9 through 16 contain the Giorgio Armani branded residences. Levels 17 through 44 house additional residential apartments. Levels 45 through 108 contain private ultra-luxury residences: approximately 900 luxury apartments in total. The 2009 pricing for Armani Residences in the building reached $3,500 per square foot, reflecting the extraordinary premium commanded by the building’s address.
Corporate suites occupy levels 112 through 154, with the exception of the observation decks and restaurant floors. The At the Top observation deck on the 124th floor was the world’s highest observation deck when it opened, offering 360-degree views of the Dubai skyline, the Arabian Gulf, and on clear days, the mountains that form the border with Oman and the Iranian coast across the water. Additional observation deck experiences on the 125th and 148th floors have since been added. The At.mosphere restaurant on the 122nd floor became one of the world’s highest restaurants when the building opened. A telecommunications antenna and broadcast tower occupy the building’s uppermost section.
Building services for a structure of this scale are equally extraordinary. The Burj Khalifa contains 57 elevators and 8 escalators. The high-speed elevators travel at 10 meters per second, reaching the highest floors in under a minute. The elevator shafts are pressurized to prevent the kind of pressure-related discomfort that passengers would otherwise experience at extreme heights. The building’s water supply and waste systems, electrical systems, and fire suppression systems are all engineered to a scale and complexity without precedent in any previous building.
The Opening Ceremony and the World Records
The official opening ceremony on January 4, 2010 was organized to celebrate both the building’s inauguration and Sheikh Mohammed bin Rashid Al Maktoum’s fourth anniversary as ruler of Dubai, the two events falling on the same date. The ceremony featured a fireworks display that was visible across Dubai and was broadcast live to an audience that the organizers estimated at more than 2 million people. The display lasted approximately three minutes and included fireworks launched from the building itself, a spectacle that anticipated the annual New Year’s Eve fireworks tradition that the Burj Khalifa would establish beginning on January 1, 2011.
The records the building holds span multiple categories. It is the tallest existing structure on earth at 829.8 meters. It is the tallest structure ever built, surpassing the Warsaw Radio Mast that stood in Poland from 1974 until its collapse in 1991. It is the tallest freestanding structure, surpassing the CN Tower in Toronto which had held that record since 1976. It is the building with the highest number of floors at 163. It holds the record for the highest concrete pour at 606 meters. Its elevators hold the record for the longest single-movement travel distance in any building. The Council on Tall Buildings and Urban Habitat, the Chicago-based organization regarded as the global authority on skyscraper measurements, formally certified these records on March 10, 2010, completing the building’s official designation as the tallest structure in the world.
The Guinness World Records account of the Burj Khalifa documents the full scope of the records the building holds, the certification process, and the continuing significance of the structure as a global benchmark for architectural ambition.
The Legacy of the Burj Khalifa: A Skyline Changed and a Question Posed
The Burj Khalifa transformed Downtown Dubai from a desert construction site into one of the most recognized urban destinations in the world. The development that surrounds it, including Dubai Mall, one of the world’s largest shopping centers, the Dubai Fountain, described as the world’s largest choreographed fountain system, and a dense cluster of luxury hotels, residences, and office towers, has fulfilled the ambition of creating an urban center that rivals the most famous city districts anywhere.
The building became Dubai’s primary global symbol, appearing in countless films, television programs, advertisements, and news reports, transforming the city’s image from a Gulf emirate into a global metropolis. The annual New Year’s Eve fireworks display, broadcast worldwide, has made the Burj Khalifa one of the most watched venues in the world each December 31. Millions of visitors ride its observation elevators each year.
The building also sparked debate about the nature of architectural ambition in the twenty-first century and the human cost of achieving it. The conditions of the migrant workers who built it became a subject of ongoing international attention. The debt crisis that accompanied Dubai’s construction boom, and Abu Dhabi’s role in resolving it, shaped the political economy of the UAE for years afterward. The building’s naming, announced as a surprise at its opening ceremony, embedded a specific financial and political relationship into the structure permanently.
The question the Burj Khalifa poses, whether any building taller can or should be built, has not gone away. The Jeddah Tower, under construction in Saudi Arabia and designed to reach 1,000 meters, is intended to surpass the Burj Khalifa if it is completed. Whether that project eventually succeeds or not, the Burj Khalifa set the standard that any future claimant to the title of world’s tallest building must exceed. When Sheikh Mohammed revealed the building’s name and height on the evening of January 4, 2010, he was announcing not just a building but a new benchmark for what human ambition, engineering skill, and extraordinary financial resources could accomplish when they were all directed at a single point in the sky over a city that had, within a single generation, risen from desert to global metropolis.
