Top-down construction: A new approach to building skyscrapers

Top-down construction, a relatively new approach to high-rise construction, involves building the top floor first and the ground floor last. This method, exemplified by the Exchange tower in Detroit, may seem unconventional, as the building appears to be supported primarily by a few thick concrete pillars. However, it actually follows the same structural principles as traditional skyscrapers. The core of the building, consisting of steel-reinforced concrete columns, provides the necessary support, while the exterior walls serve as a protective wrapping. The top-down approach offers certain advantages, such as improved safety for workers, as walls are already in place during construction, and reduced spatial requirements on tight urban sites. While it may not become the predominant method, it is likely to be utilized more frequently in specific situations.