Structural engineer Steven Tipping doesn't often attend industry events, let alone introduce himself to keynote speakers. But he is glad he did just that on Dec. 5, 2007. So is the team for the $145.5-million San Francisco Public Utilities Commission Headquarters, a nearly finished job with a difficult past.
Tipping's actions at the Dec. 5 breakfast—at which a project of his was recognized and he heard Webcor Builders' Phillip Williams speak—inadvertently helped recenter the ailing job. The 13-story showcase for sustainable design and construction owes its existence, in part, to serendipity.
Because it can moderate the damaging effects of earthquakes, base-isolation is a technique used primarily in seismically active regions. ENR takes a look at some of the largest applications of base-isolation technologies in the world.