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Pioneer Courthouse Seismic Upgrade
Portland, Oregon
Originally built in 1875, the Pioneer Courthouse covers an entire city block in Portland, Oregon. JE Dunn - NW completed a seismic upgrade which enables the historic building to withstand a magnitude 8.5 earthquake.
Unique features:
- This is the first friction pendulum base isolation system in Portland and one of only fifty in the entire country.
- The friction pendulum base isolation system works by separating the building from the earth. A "moat" surrounds the building, detaching it from the ground at the perimeter and allowing it to move freely up to 18" in each direction.
- All work happens under the building, therefore leaving the actual building intact.
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SERA Architects
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