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Reinforce Cripple Walls

If a cripple wall is not braced adequately, it can shift during an earthquake. To brace a cripple wall, add horizontal or diagonal blocking between the vertical studs at the top and bottom of the cripple wall. Plywood can also be anchored to the interior face of the cripple wall, as well as to the sill plate below the foundation to increase its strength. 

Effectiveness:

  • Somewhat effective.

Limitations:

  • Confinement in the crawl space may limit ability to perform this mitigation.

 

 

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Randolph Langenbach

M-Arch (Harvard), Dipl.Conservation (York, England)


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