why guess when you can find the exact answer in the Dev application docs.The foundations need to sit on bedrock, not sure the depth of bedrock at his location but definitely more that one level down. I guess it depends on how many levels of parking they want to provide.
The person who asked the question can check the details, I was just pointing out that a building especially that tall needs to go to bedrock. I personally don't care how deep it goes.
Hasn't Salesforce Tower sunk like a foot-and-a-half, though? Maybe not the best counter-example
...especially for earthquakes (strong earthquakes occur in San Francisco approximately once a century; there's a reason why the Transamerica Pyramid survived the Loma Prieta earthquake undamaged in 1989).It's back open now but ya that whole area is a mess. They released plans to actually pile down to bedrock for Millennium tower which is pretty deep down in that part of town (lot's of infill here).