There are no interior walls or columns, allowing designers to have complete creative freedom with each floor’s layout.īarton Marlow, Liftbuild’s parent company, led the design and construction and also funded the project as a demonstration of its capabilities. The floors are then permanently secured to the spines using a proprietary bolted connection.Įach floor is a cantilevered design supported solely by the two spines, resulting in unobstructed views from the residents’ windows. When each 453 metric tonne floor is ready, it’s lifted to the top of the spines using eight strand jacks, with the upper floors taking about 10 hours to lift. Any work that needs to be done under the slab can be accomplished by lifting the entire structure using jacks around the spines. Liftbuild coordinates with various contractors to ensure that as much work as possible is done on the ground, creating a factory-like assembly area where prefabricated parts are installed and lifting is minimised. In this latest iteration, the process works as follows: first, the foundations are prepared and central spines are erected, containing stairs and elevators, to the full height of the building.Įach floor, starting with the roof, is built close to the ground, including the steel frame, concrete slab, facade, flooring, walls, electrical systems, plumbing, fire protection, ducting, and more. Liftbuild, the company behind the construction, utilised a hyper-modular version of the lift slab technique that dates back to the 1950s. ( main pic: Liftbuild’s modular-built top-down skyscraper in Detroit. Its floors were each prefabricated on the ground and then lifted and installed from the top down using central spines. The building, which is 63 m tall, is a testament to an advanced modular construction technique. The Exchange tower in Detroit, a “top-down” skyscraper, is in the final stages of completion.
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