L.A. mayor proposes mandatory seismic retrofits for steel buildings, daycare centers, private schools

Garcetti’s plan to make buildings more resilient to earthquakes would also apply to daycare centers and private schools. The proposal comes after the recently published Resilient Los Angeles report said steel buildings constructed from the early 1970s through 1994 were susceptible to earthquake damage because of welding techniques, the inspection process, the filler metal used in the welds and the configuration of the connection between vertical columns and horizontal beams.

According to a U.S. Geological Survey study, there are five steel buildings in Southern California that could collapse in a major earthquake, potentially causing hundreds of deaths and injuries. Steel buildings once were considered to be among the most resistant to earthquakes, but about 25 “steel moment frame” buildings fractured after the magnitude 6.7 Northridge earthquake in 1994.

The Resilient Los Angeles report also argues for stronger minimum earthquake standards for all new construction. Los Angeles already has some of California’s strongest earthquake retrofit laws that apply to brick buildings, concrete-frame structures, and wood-frame apartments.

New York City has two very large buildings dedicated to answering the 911 calls of its five boroughs. With more than 11 million emergency calls annually, it makes perfect sense. The second of these buildings, the Public Safety Answering Center II (PSAC II) is located on a nine-acre parcel of land in the Bronx. It’s an imposing 450,000 square-foot structure—a 240-foot-wide by 240-foot-tall cube. The gleaming aluminum cube risesthe equivalent of 24 stories from behind a grassy berm, projecting the unlikely impression that it might actually be floating. Like most visually striking structures, the building has drawn as much scorn as it has admiration.