![]() “Once we got the hard demo done, we were able to start the foundation work in the fall of 2021.” “Until we had the temporary plant set up in early 2020, we could not do the hard demolition of the existing mechanical systems,” he explains. That created the need to build temporary systems for the hotel-and to orchestrate demolition around them, says Mike Goldberg, Tishman executive vice president and project executive. The effort had an added layer of complexity because One Madison houses mechanical systems for the adjacent 700-ft-tall clock tower, which today is a luxury hotel. Between the shoring and enclosures we built on every floor, it was pretty complex, but it was well worth it-a good strategy for demolition.” ![]() “There were shoring jacks underneath-multiple layers of steel plates. “We built a giant enclosure around these chutes- with massive reinforced wood doors-to speed up the process,” he says. To handle the scope of demolition, the team strategically repurposed the building’s old elevator shafts into a giant debris chute, sending concrete and other materials to the basement and subcellar, Leiro says. “We basically demoed top-down-we ‘apple-cored’ the building down to grade, to the existing foundations.” “The mechanical penthouse had a tremendous amount of old, very large and very heavy pieces of equipment that all had to be demoed,” he says. Removing the mountain of systems and old building core also were sizable tasks, says Rob Blackman, Tishman executive vice president. The complex adaptive reuse project started with demolition of the old building’s top five floors, gut renovation of remaining floors and construction of a new building core for the 27-story tower. The overall height was 240 feet approximately, and we demoed 123 feet of it, so we almost took half the building height off.”
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