building engineers worked with university and private
researchers to develop a precast concrete building joint
that can withstand strong earthquakes. The joints use
high-strength steel cables and mild steel bars that
stretch during an earthquake, then return to their original
shape. The joints were used to construct a 39-story
apartment building in San Francisco.
39-story apartment building in San Francisco contains earthquake-resistant
joints developed by NIST, the University of Washington,
and Charles Pankow Builders Ltd.