Burj Khalifa vs Two Prudential Plaza

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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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Two Prudential Plaza is a 64-story skyscraper located in the Loop area of Chicago, Illinois, United States.

At 995 ft (303 m) tall, it's now the sixth-tallest building in Chicago and the seventeenth-tallest in the U.S., being only five feet from 1,000 ft, making it the closest of any building under 1,000. Built in 1990, the building was designed by the firm Loebl Schlossman & Hackl, with Stephen T. Wright as the principal in charge of design. It has been honored with 8 awards, including winning the Best Structure Award from the Structural Engineers Association of Illinois in 1995. At the time of completion, Two Prudential was the world's tallest reinforced concrete building. Its distinctive shape features stacked chevron setbacks on the north and south sides, a pyramidal peak rotated 45°, and an 80-foot (24 m) spire. The building is attached to One Prudential Plaza (formerly called the Prudential Building). With no spire, the building's height is still slightly greater than that of One Prudential Plaza's pinnacle.In May 2006, BentleyForbes, a Los Angeles-based property investment firm, run by Frederick Wehba and his family bought Two Prudential Plaza, along with its sister property, One Prudential Plaza for $470 million.In 2015, BentleyForbes defaulted on the mortgage for the towers on account of the terrific Recession and New York-based investors 601W Firms and Berkley Properties took control of the property after investing more than $100 million in equity to recapitalize. BentleyForbes, the former controlling owner of the towers, continues to have an interest in the owning partnership.The building is also the new home of the Chicago Tribune and tronc, Inc. after leaving Tribune Tower in July 2018.

Source: Wikipedia