The developer of the world’s tallest building, which opened on Jan. 4 in Dubai after more than a year’s delay, has announced the height at 828 meters. The announcement ends years of speculation, fueled by developer Emaar Properties. Members of the design and construction team, including architect-engineer Skidmore, Owings & Merrill and lead contractor Samsung Corp., were contractually obligated to keep the height a secret. The 828-m height makes the building 320 m taller than the previous world’s tallest building, the 508-m Taipei 101. The difference is equivalent to an 80-story-plus tower. The Burj Khalifa, which is the Burj Dubai’s
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.