While seismic retrofitting can be crucial anywhere, it is especially important at Joint Base Lewis-McChord. A total of three large fault lines run through a state that is home to the Cascadia subduction zone, which has the potential to produce some of the largest and most destructive earthquakes in the world. Washington State is a high-risk location for seismic activity, with the second highest risk in the United States of large and damaging earthquakes.
By following ASCE Standard 41-17, Seismic Evaluation and Retrofit of Existing Buildings, and applying results from evaluations, the design team was able to provide cost- effective retrofits that worked with the existing structural elements and brought the facility into compliance with the required seismic codes. A recent evaluation and retrofit of Hangar 3052 at Joint-Base Lewis-McChord, Wash., illustrates that need to determine scope early. Knowing when these evaluations and enhanced retrofits are required is important to identify early on in a project’s scope of work.
As the federal government continues to make a push for existing buildings to be more resilient and able to withstand increased seismic and wind loads, enhancements to structures are becoming required as part of renovations.
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A recently completed retrofit of Hangar 3052 at Joint Base Lewis-McChord demonstrates how to utilize the Seismic Evaluation and Retrofit of Existing Buildings Standard to make facilities better able to withstand earthquake forces.
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