Burj Khalifa; Jengo refu kuliko yote duniani

Burj Khalifa ndilo jengo refu kuliko yote duniani hadi hivi sasa. Nimekuwekea maelezo kidogo kuhusu jengo hilo lilipo nchini Dubai;

Former names	Burj Dubai
Record height
Tallest in the world since 2008[I]
Preceded by	Taipei 101
General information
Status	Complete
Type	Mixed-use
Architectural style	Neo-futurism
Location	1 Sheikh Mohammed bin Rashid Boulevard,Dubai, United Arab Emirates
Coordinates	25°11′49.7″N55°16′26.8″E
Construction started	6 January 2004
Completed	Intended: September 2008; Revised: 2 December 2009[1]
Opened	4 January 2010[2]
Cost	USD $ 1.5 billion[3]
Height
Architectural	828 m (2,717 ft)[4]
Tip	829.8 m (2,722 ft)[4]
Roof	828 m (2,717 ft)
Top floor	584.5 m (1,918 ft) (Level 154)[4]
Observatory	555.7 m (1,823 ft) (Level 148)[4]
Technical details
Material	Glass, steel, aluminium, reinforced concrete
Floor count	163 above ground. 154 usable floors[4][5] plus 9 maintenance levels (46 spire levels)[6] and 2 below-ground parking levels
Floor area	309,473 m2(3,331,100 sq ft)[4]
Lifts/elevators	57 (55 single deck and 2 double deck), made by Otis Elevator Company
Design and construction
Architect	Adrian Smith atSOM
Developer	Emaar Properties[4]
Structural engineer	Bill Baker at SOM[7]
Main contractor	Samsung C&T Corporation, Besix andArabtec Supervision Consultant Engineer & Architect of Record Hyder Consulting Construction Project Manager Turner Construction Grocon[8] Planning Bauer AG and Middle East Foundations[8] Lift contractor Otis[8] VT consultant Lerch Bates[8]

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