San Francisco’s leaning Millennium Tower is now partly supported to bedrock as part of a “seismic upgrade,” but experts tell NBC Bay Area that questions remain about how well the newly bolstered tower will stand up in a quake.
As it stands now, the tower leans 29 inches northwest at the corner of Mission and Fremont streets. Fix engineers have said the tower could ride out a major quake even if it leans five feet, but life safety systems will start to fail if tilt exceeds 40 inches.
To predict how the building will perform into the future, the fix team developed an elaborate computer model. That model estimates