Burj Khalifa vs Torre Colpatria

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The Burj Khalifa (Arabic: ??? ?????, Arabic pronunciation: [b?rd?? xa?li?fa]; pronounced English: ), known as the Burj Dubai prior to its inauguration in 2010, is a skyscraper in Dubai, United Arab Emirates. With a total height of 829.8 m (2,722 feet, just over half a mile) and a roof height (excluding antenna, but such as a 244 m spire) of 828 m (2,717 feet ), the Burj Khalifa has been the tallest structure and building in the world since its topping out in 2009 (preceded by Taipei 101).Construction of the Burj Khalifa began in 2004, with the exterior finished five decades later in 2009. The principal structure is reinforced concrete. The building was opened in 2010 as part of a new development called Downtown Dubai. It is designed to be the centrepiece of large-scale, mixed-use development. The decision to construct the building relies on the government's decision to diversify from an oil-based economy, and for Dubai to obtain international recognition. The building was originally named Burj Dubai but was renamed in honour 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, including its designation as the tallest building in the world. Burj Khalifa was designed by Adrian Smith, of Skidmore, Owings & Merrill, whose firm designed the Willis Tower and One World Trade Center. Hyder Consulting was selected to be the supervising engineer with NORR Group Consultants International Limited selected to supervise the architecture of this project. The design is derived from the Islamic architecture of the region, such as in the Great Mosque of Samarra.

The Y-shaped tripartite floor geometry is designed to optimize residential and hotel room. A buttressed central core and wings are utilised to support the elevation of the building. Although this design was derived from Tower Palace III, the Burj Khalifa's central center homes all vertical transport with the exception of egress stairs within each of the wings. The structure also offers a cladding system which is designed to withstand Dubai's hot summer temperatures. It comprises a total of 57 elevators and 8 escalators. At a particular stage in the architectural and engineering process, the original Emaar programmers experienced financial problems, and required more money and financial funding. Sheikh Khalifa, the ruler of the United Arab Emirates, granted monetary aid and financing, hence resulting in the changing of the name to'Burj Khalifa'. The concept of profitability derived from creating high density developments and malls around the landmark have proven effective. Its surrounding malls, hotels and condos in Downtown Dubai have generated the most revenue from the project as a whole, while the Burj Khalifa itself made little or no profit.Critical reception to Burj Khalifa has been generally positive, and the building has received many awards. However, there were numerous complaints regarding migrant workers from South Asia who were the key building labor force. These centered on low wages and the practice of confiscating passports until duties were complete. Several suicides were reported.

Source: Wikipedia

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The Torre Colpatria (English: Colpatria tower) is a 50-story skyscraper in the downtown area of Bogotá, Colombia. It's the third largest building in the nation and the fifth-tallest in South America. Constructed from 1973 to 1978 and opened in 1979, it has a complete height of 196 metres (643 ft), becoming the tallest skyscraper of Colombia and holding this title until 2016, when the south tower of the BD Bacatá was topped off. The main headquarters of the Colpatria Bank are located in the building, in addition to a large number of other banks and financial corporations have offices in it. The building lies at the intersection of 26th street and 7th avenue, in the heart of the city's downtown. Since 1998 the Colpatria Tower was illuminated nightly with thirty-six color changing Xenon lights. But, in 2012, the Dutch lighting company Philips replaced the old lights with a 120-meters-high LED system to enhance the lighting of the construction and project high-definition pictures. . Due to that, and also because it was the tallest skyscraper in Colombia for almost 40 years, the building is a landmark in the nation and dominates Bogota's skyline along with other structures like the BD Bacatá, the World Trade Center, FONADE and Colseguros buildings.

Source: Wikipedia