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September 13, 2018

Are Seattle high rises with welding defects vulnerable to quakes? Q&A with Kopczynski

  • Engineers have known about the defect in certain steel-frame buildings since the 1994 Northridge earthquake.
    Journal Staff Reporter

    Map information from CKC/USGS [enlarge]
    This map shows how horizontal ground shaking in an earthquake varies across the region. The numbers here are figures from USGS on horizontal ground shaking as a percentage of gravity during the 6.8 Nisqually earthquake.

    A New York Times story in June focused on San Francisco high rises that are potentially vulnerable in a big earthquake due to a major defect in certain older steel-frame buildings.

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