Large crack reportedly forms in window of San Francisco's sinking Millennium Tower 
 
 Officials with the City and County of San Francisco Department of Building Inspection are requiring Millennium Tower building engineers to evaluate the extent of repairs needed to fix the crack and investigate the condition of the glass panel and adjacent curtain wall system by Friday, Sept. 7, 2018. less Officials with the City and County of San Francisco Department of Building Inspection are requiring Millennium Tower building engineers to evaluate the extent of repairs needed to fix the crack and investigate ... more Photo: Courtesy Of City And County Of San Francisco Department Of Building Inspection Photo: Courtesy Of City And County Of San Francisco Department Of Building Inspection Image 1 of / 13 Caption Close Large crack reportedly forms in window of San Francisco's sinking Millennium Tower 1 / 13 Back to Gallery 
 
 A new defect in San Francisco's sinking and tilting Millennium Tower has appeared. 
 
 A large crack reportedly formed in a window on the 36th Floor of the building on Sunday, according to a resident. 
 
 Department of Building Inspection spokesperson Bill Strawn says a correction notice was issued and building engineers have 72 hours to report back on what happened. 
 
 "Our building inspector to the site...was not able to gain access to the unit and thus unable to see the alleged crack," Strawn said in an email. "The visit by the inspector was in response to a complaint." 
 
 ALSO: New '60 Minutes' shows shocking footage of the cracks in the Millennium Tower basement 
 
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 NBC Bay Area reports Millennium Tower residents heard a "creaking sound and then a large pop" before the crack appeared at 2:30 a.m. Sunday. 
 
 Supervisor Aaron Peskin confirms there's a crack in a window and says, "Building management sent an email to all the owners saying they thought this crack [was related to] the ongoing problems with the building—i.e., the settling, sinking of the building." 
 
 Peskin says the window system that's part of something called the "curtain wall" is designed to sustain hurricane force winds. 
 
 "If a window failed entirely it would rain shards of glass hundreds of feet below down onto one of the busiest, most congested parts of the city. The city better take this seriously," Peskin continued 
 
 Peskin says he asked the Building Inspection Department to consider closing the sidewalks below the cracked window. 
 
 MORE, Millennium Tower keeps on sinking, but there may be a fix 
 
 Rising 645 feet, the Millennium Tower at 301 Mission St. in the South of Market district became the tallest residential building in the city when it opened in 2009. 
 
 Residents learned in 2016 that the 58-story building was sinking, and a flurry of lawsuits from owners of condos followed, including one from the homeowners association seeking $200 million. 
 
 Residents paid anywhere from $1.6 million to $10 million for their units. 
 
 The building has sunk some 17 inches since construction began in 2005 and its tilting about 14 inches. 
 
 SFGATE reached out to Millennium Tower management and didn't hear back before publishing the story. 
 
 This story was updated on Sept. 6, 2018, at 8:40 a.m. ||||| A large crack formed in a window at the sinking and tilting Millennium Tower over the Labor Day weekend, prompting officials there to block off part of the sidewalk on Mission Street as a precaution, NBC Bay Area’s Investigative Unit has learned. Investigative Reporter Jaxon Van Derbeken reports. 
 
 A large crack formed in a window at the sinking and tilting Millennium Tower over the Labor Day weekend, prompting officials there to block off part of the sidewalk on Mission Street as a precaution, NBC Bay Area’s Investigative Unit has learned. 
 
 More Concerns for Millennium Tower Due to Cracked Window 
 
 We're getting our first look at the cracked window in San Francisco's sinking and tilting Millennium Tower that has a lot of residents worried. They are worried because it raises more concerns about stability of the high-rise that's now leaning 18 inches. When Investigative Reporter Jaxon Van Derbeken first broke this story on Tuesday, residents inside the tower did not want to talk. On Wednesday, several residents talked with him to discuss their concerns. (Published Wednesday, Sept. 5, 2018) 
 
 City inspectors issued a notice of violation on Tuesday, giving the Millennium management 72 hours to report back on the extent of the problem and the soundness of the building’s façade in light of the failure. 
 
 Residents started hearing creaking sounds followed by a loud popping noise at 2:30 a.m. Saturday. Soon afterward, one owner found the crack in his window in a 36th floor unit in the north western corner of the 58-story high-rise. The tower is currently tilting some 18 inches when measured at the top. 
 
 A look at the crack on a window in a 36th floor unit of San Francisco's Millennium Tower. 
 
 
 
 San Francisco City Supervisor Aaron Peskin notes the failed window was supposed to withstand hurricane force winds. 
 
 “When you have a window at the 36th floor that cracks in the middle of the night that is a big wake up call,” says Peskin, who has held a series of hearings into why the tower has been sinking so dramatically. 
 
 Video Millennium Tower Cited for Fire Safety Danger 
 
 In a bulletin about the latest problem sent to owners on Labor Day and obtained by NBC Bay Area, building manager Michael Scofield assured them a team of experts would soon assess what he described as “a large piece of glass that cracked.” 
 
 Scofield acknowledged it’s “possible that this incident is related to other issues in the building.” 
 
 A string of problems may have been triggered by differential settlement of the structure -- everything from cracks in the basement walls to strange odors permeating some units. 
 
 The issue of who is to blame has become mired in a legal morass. As the building continues to sink and tilt, NBC Bay Area has detailed concerns by experts about the possibility the façade of the building, known as the curtain wall, may be separating from the interior structure. 
 
 That could pose a risk, they say, that a fire could spread through gaps between floors. The failure of the 36th floor window could be evidence of strain on the steel lattice that forms the façade. 
 
 For now, Millennium manager Scofield told residents the barrier will remain out front along Mission Street until repairs are made. 
 
 “This is a public safety hazard,” Peskin says of the window failure, adding that the city Department of Building Inspection must act immediately to assure the safety of thousands of people who walk by the building every day. 
 
 “The real question is do we need to limit pedestrian access on the sidewalks beneath the Millennium?” he says. “I want our Department of Building Inspection to make that decision and pronto.” 
 
 Investigative Test Drilling Launched at the Sinking Millennium Tower 
 
 Department of Building Inspection spokesman William Strawn said in a statement late Tuesday that per the building engineer’s comments to the city inspector, “It does not appear to present any sidewalk safety issue at this time. We will be following up.”
– More bad news for San Francisco's Millennium Tower. This time, it's a crack in a window on the 36th floor of the 58-story building, SFGate reports. It happened Saturday around 2:30am when residents heard "creaking noises" and a "loud pop," per NBC Bay Area. Later, a resident found a crack in his window. San Francisco Supervisor Aaron Peskin tells SFGate that if the window, which is designed to withstand hurricane-force winds, were to fail completely "it would rain shards of glass hundreds of feet below onto one of the busiest, most congested parts of the city." Opened in 2009, the 645-foot-tall Millennium Tower has reportedly sunk some 17 inches and is tilting (by 14 inches per SFGate, by 18 inches per NBC). In an email to residents, per Peskin, building management confirmed the window crack and said it was related to "ongoing problems with the building—i.e., the settling, sinking of the building." Other issues, according to NBC, include cracks in the basement wall and "strange odors" in some units. Units in the building sold for between $1.6 million and $10 million, per SFGate.