San Francisco is one step closer to finding out how many buildings are not seismically sound.
“This is a category of buildings largely concrete buildings built prior to 1995. Those buildings if they don’t have steel in them, which most of them if it’s not steel in a particular way can be in very bad shape. In the event of a big earthquake and that can be very dangerous for residents or people working in those buildings,” said San Francisco Supervisor Rafael Mandelman…