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Burj Khalifa ((アラビア語:برج خليفة), "Khalifa Tower", pronounced ), known as Burj Dubai before its inauguration, is a megatall skyscraper in Dubai, United Arab Emirates. It is the tallest artificial structure in the world, standing at .〔〔 Construction of Burj Khalifa began in 2004, with the exterior completed in 2009. The primary structure is reinforced concrete. The building opened in 2010, as part of the new development called Downtown Dubai. It is designed to be the centerpiece of large-scale, mixed-use development. The decision to build the building is reportedly based on the government's decision to diversify from an oil-based economy, and for Dubai to gain international recognition. The building was named in honor of the ruler of Abu Dhabi and president of the United Arab Emirates, Khalifa bin Zayed Al Nahyan; Abu Dhabi and the UAE government lent Dubai money to pay its debts. The building broke numerous height records. Burj Khalifa was designed by Adrian Smith then of Skidmore, Owings and Merrill (SOM), whose firm also designed the Willis Tower and the One World Trade Center. Hyder Consulting was chosen to be the supervising engineer with NORR Group Consultants International Limited chosen to supervise the architecture of the project. The design of Burj Khalifa is derived from patterning systems embodied in Islamic architecture, incorporating cultural and historical elements particular to the region such as the spiral minaret. The Y-shaped plan is designed for residential and hotel usage. A buttressed core structural system is used to support the height of the building, and the cladding system is designed to withstand Dubai's summer temperatures. A total of 57 elevators and 8 escalators are installed, with the elevators having a capacity of 12 to 14 people per cabin. Critical reception to Burj Khalifa has been generally positive, and the building received many awards. However, the labor issues during construction have been controversial, since the building was built primarily by workers from South Asia and East Asia, who earned low wages and were reportedly housed in poor conditions. == Development == Construction began on 6 January 2004, with the exterior of the structure completed on 1 October 2009. The building officially opened on 4 January 2010,〔 〕 and is part of the new development called Downtown Dubai at the 'First Interchange' along Sheikh Zayed Road, near Dubai's main business district. The tower's architecture and engineering were performed by Skidmore, Owings and Merrill of Chicago, with Adrian Smith as chief architect, and Bill Baker as chief structural engineer. The primary contractor was Samsung C&T of South Korea.〔(【引用サイトリンク】title=Burj Dubai, Dubai – SkyscraperPage.com )〕 The tower's construction was done by the construction division of Al Ghurair Investment group.〔(【引用サイトリンク】title=Al Ghurair :: Building the Burj Khalifa )〕〔(【引用サイトリンク】title=Platinum Sponsor – Al Ghurair Construction Aluminum )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Burj Khalifa」の詳細全文を読む スポンサード リンク
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