![]() “It’s in everyone’s interest that this project is completed as quickly as possible,” he concluded. Installing 18 steel piles to bedrock now is the best way to stop the tilting and possibly reverse some of it, he told supervisors. The building remains safe, but although the building remains safe, we believe the project needs to resume construction and complete this construction quickly.”Īt the current rate, the tower’s lean could reach the functional 40-inch maximum – the point Hamburger says the elevators and plumbing may not continue to operate – in just a few years without the fix. “It is doing this whether we are conducting work at the site or not. “The building does continue to settle at a rate of about one half inch per year and to tilt at a rate of about three inches per year,” he said. Hamburger separately revealed that the building continues to tilt at the rate of three inches per year. ![]() “I don’t think there’s a lot of room here for on-the-job learning.” “This is a 50-plus story building, very heavy, in the heart of downtown San Francisco,” Peskin countered. Peskin turned to city officials, who assured him that was standard practice for such projects. And he basically did those as a design build to install the piles in which he determined the methods by which he would install them.” We specified that we needed piles of a given diameter and strength. “We did not tell them how to install piles. ![]() “The procedures for installing piles were basically the contractor’s prerogative,” Hamburger told city supervisors. In his remarks, Hamburger acknowledged for the first time that his team did not provide any initial guidance to Shimmick Construction, the fix contractor, on ways to limit the impact of the drilling and digging to install steel support piles. “We start this new year 2022 as we ended last year and many other years, with the Millennium Tower continuing to sink and tilt,” a clearly exasperated Peskin said before introducing fix engineer Ron Hamburger at the hearing. Monitoring data shows that 10 inches of that tilt and about 2 inches of settlement occurred during work on the so-called fix last year. Engineers in Chicago have taken the rather insane yet utterly enthralling step of installing tilting windows in the very tall John Hancock Centre skyscraper. Sign up for NBC Bay Area’s Housing Deconstructed newsletter. Get a weekly recap of the latest San Francisco Bay Area housing news. The tilting windows on the John Hancock Center observation deck give you the best view of Chicago. ![]()
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