seismic retrofit of elevated freeway

Columns supporting the 280 Freeway in the Dog Patch neighborhood of San Francisco.­

The columns have been braced with steel sleeves for seismic retrofit.­ This gives them more resistance to compression stress in case of an earthquake.­

280 columns concrete dog patch elevated freeway infrastructure pillars urban
Southern Embarcadero Fwy, San Francisco, CA 94107, USA

Unclassified photos taken in San Francisco Bay Area.­