Once work is done extending the foundation along Fremont, crews are going to transfer 15 million pounds of weight onto the dozen piles along the west side of the tower, Hamburger said.Ĭomputer models designed to predict behaviorproject that the work will offset about 4.5 inches of lean at the northwest corner if all goes to plan.īut Harry Poulos, an internationally recognized tall building expert, stresses that even if the fix works as planned it will offset less than half the 10 inches of tilting caused during the fix work. Hamburger told residents he expects that just taking some weight off the building along Mission “would slow substantially, if not stop” more settlement, adding that preliminary data shows the early phase “has been successful and exceeded the engineering team’s projections.” Millennium Tower Fix Shifts to Hasten Completion Ultimately, the building will be tied to 18 piles already sunk to bedrock, six on Mission and the balance on Fremont Street. The goal for now, he said, is to stabilize the tower’s north side so crews can dig much more to extend the foundation along the west side of the structure along Fremont Street. That is about half the load the Mission Street piles will ultimately carry, he said. In an email update Saturday to residents of the building, lead fix engineer Ron Hamburger said three million pounds of the building’s weight along the Mission Street side is supported by six piles that extend down to bedrock on the north side. The high-rise is currently tilting more than 29 inches at the northwest corner, about a third of that lean occurring after construction began back in 2021 on work aimed at stabilizing the building. The association did not immediately respond to a request for comment from the Guardian.San Francisco’s troubled Millennium Tower high-rise is now supported partially on one side to piles sunk to bedrock – bolstering that should assure the $100 million project will be completed without more sinking and tilting of the building, the fix’s lead engineer is telling residents. Shortly after work began, however, the sinking and tilting accelerated the building now has a tilt of 22 inches, NBC Bay Area reported.Ī spokesperson for the Millennium Tower Association told the San Francisco Chronicle that the building is safe, but that it would suspend work on the project out of caution while it works to better understand the issue. In May, crews started work on the perimeter pile upgrade project to install 52 concrete, 140,000lb piles to anchor the building to bedrock 250ft below ground. This is a one-of-a-kind situation we won’t ever see again in San Francisco.”Ī confidential settlement reached last year included a $100m plan to fix the building, and compensate homeowners in the building for estimated losses. “It will be a roadmap for other downtown developments for what to avoid. “This litigation exposed a lot of problems in the development of this particular building,” Niall McCarthy, an attorney representing a group of homeowners, told the Guardian in 2019. Photograph: Beck Diefenbach / Reuters/Reuters Pedestrians inspect cracks near the sinking Millennium tower in San Francisco in 2016.
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