2016 ACEC Engineering Excellence Grand Conceptor Award Winner
Designed by international engineering firm Walter P Moore
Air Traffic Control Tower & Integrated Facility
San Francisco, Calif.
The new air traffic control tower for the nation’s seventh busiest airport features pioneering seismic engineering that provides both toppling resistance and a self-centering capability during an earthquake. The previous tower was temporarily knocked out of commission in 1989 during the 6.9 magnitude Loma Prieta earthquake, compromising air safety. With the San Francisco airport situated just four miles from the San Andreas Fault, the new 231-foot-tall tower features a reinforced concrete core cylinder with vertical posttensioning that can withstand a 7.5 magnitude earthquake. When seismic forces cause the core to bend, the post-tensioning responds by applying a clamping force to restore the tower to its initial position. The tower design also uses a tuned mass damping system to limit sway of the slender tower during the high winds common in the region.
ANDREGG provided control, construction staking and as-built surveys for this award winning project!