But removing debris from the existing rubble pile does have the potential to destabilize the remaining, standing portion of the building, and, even with very close monitoring, it is a challenge and not without significant risk," he said. "This will, of course, not be an easy decision. Once officials move to the recovery phase, it would make sense to demolish the remaining portion of the building before finishing the recovery effort, Wallace said. Any vibrations associated with the collapse of the tower could impact the existing rubble pile, causing it to compact and tighten any voids, he said.Įarlier this week, Miami-Dade Fire Rescue Assistant Chief Ray Jadallah said crews had identified additional voids in the rubble where residents could be located, but there is no evidence anyone is inside. John Wallace, a professor of structural engineering at the University of California, Los Angeles, said he suspected demolition would be unlikely until search and rescue is completed. "They could put people underneath the building and implode it without putting people on top of the pile where they’re searching." "If they implode the building, they can control the way it’s going to fall and divert it away from where they’re searching," said Tony Stern, president of Riteway Demolition in Sunrise, Florida. Mehrdad Sasani, a professor of civil and environmental engineering at Northeastern University in Boston, said he suspects officials would choose to demolish the building by implosion given its height and size – a process that involves the strategic placement of charges to direct the way the buildings falls. There are several common demolition methods, including a wrecking ball, implosion, or a high arm reach that deconstructs the building from the top down. 'It would take a miracle': Victims' families, survivors lose hope as rescue efforts stall in Surfside building collapseĮngineers and demolition companies not directly involved in the planning were divided on how best to take down the building. What led to the collapse? Workers discovered extensive concrete damage and suspended a repair effort last fall "I'm concerned they might do it sooner than planned with storms approaching," Pashkoff said. She's closely watched the recent announcements of demolition considerations.
Nancy Pashkoff, 55, who has lived in Florida for 35 years, said it's been "heartbreaking" to watch the scene unfold in Surfside and that she can barely keep herself from crying at work. "And that could affect not only the intensity, or how strong the storm is, but also the track that it takes." "There is a lot of uncertainty in the forecast: how it will evolve, how the storm will interact with the land areas that are to our south," Molleda said. Scott Nachman, structure specialist with FEMA’s search and rescue incident support team, said Thursday it would take weeks to establish a demolition timeline in the "best-case scenario."Īlpha Wrecking, a demolition-specific contractor based in Pompano Beach, Florida, was on site and did not immediately respond to USA TODAY request for comment.Įlsa is expected to emerge off the coast of Cuba by Sunday night or Monday morning – and South Florida could experience tropical-storm force winds on Sunday, Monday or Tuesday, Robert Molleda, the warning coordination meteorologist with the National Weather Service in Miami, said Friday.Ītlantic tropical storms pack maximum sustained surface winds of 39 to 73 mph. And all of that is being reviewed by the engineers." So we have to balance those things," Levine Cava said, adding, "As to where the demolition would fall, that is part of the calculus. "We're very concerned to not compromise our search, but we also know that the building itself poses risks. Engineers are meeting regularly to determine what the demolition process would look like, and officials' top priority remains search and rescue, she said. There is no specific start date for the demolition, which would likely take "weeks," Levine Cava said in a Friday evening news briefing. Miami-Dade County Mayor Daniella Levine Cava said she signed an emergency order to demolish the remaining portion of Champlain Towers South, once engineers have signed off on the project, given the structure's imminent threat to public health and safety. – Engineers were evaluating options Friday for demolishing the remaining portion of a condo building that partially collapsed outside Miami last week, leaving 22 people dead and 126 unaccounted for.
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