Excavation work began for Burj Khalifa in January 2004 and over the ensuing years to its completion, the building passed many important milestones on its goal to become the tallest man-made structure the world has ever seen. In just 1,325 days since excavation work started in January, 2004, Burj Khalifa became the tallest free-standing structure in the world.
Burj Khalifa ConstructionTimeline
- January 2004 – Excavation started
- February 2004 – Piling started
- March 2005 – Superstructure started
- June 2006 – Level 50 reached
- January 2007 – Level 100 reached
- March 2007 – Level 110 reached
- April 2007 – Level 120 reached
- May 2007 – Level 130 reached
- July 2007 – Level 141 reached – world’s tallest building
- September 2007 – Level 150 reached – world’s tallest free-standing structure
- April 2008 – Level 160 reached – world’s tallest man-made structure
- January 2009 – Completion of spire – Burj Dubai tops out
- September 2009 – Exterior cladding competed
- January 2010 – Official launch ceremony
Over 45,000 m3 (58,900 cu yd) of concrete, weighing more than 110,000 tonnes were used to construct the concrete and steel foundation, which features 192 piles buried more than 50 m (164 ft) deep. Burj Khalifa’s construction will have used 330,000 m3 (431,600 cu yd) of concrete and 39,000 tonnes (43,000 ST; 38,000 LT) of steel rebar, and construction will have taken 22 million man-hours.
Exterior cladding of Burj Khalifa began in May 2007 and was completed in September 2009. The vast project involved more than 380 skilled engineers and on-site technicians. At the initial stage of installation, the team progressed at the rate of about 20 to 30 panels per day and eventually achieved as many as 175 panels per day.
The tower accomplished a world record for the highest installation of an aluminium and glass façade, at a height of 512 metres. The total weight of aluminium used on Burj Dubai is equivalent to that of five A380 aircraft and the total length of stainless steel bull nose fins is 293 times the height of Eiffel Tower in Paris.
In November, 2007, the highest reinforced concrete corewalls were pumped using 80 MPa concrete from ground level; a vertical height of 601 metres. Smashing the previous pumping record on a building of 470m on the Taipei 101; the world’s second tallest tower and the previous world record for vertical pumping of 532 metres for an extension to the Riva del Garda Hydroelectric Power Plant in 1994. The concrete pressure during pumping to this level was nearly 200 bars.
The amount of rebar used for the tower is 31,400 metric tons – laid end to end this would extend over a quarter of the way around the world.