A crawl space as seen from under the house.
Note the floor joists above and the foundation with the
mudsill and cripple wall on top of it.

back to How Retrofit Works - crawl space

A cripple wall as seen from outside the house.
This is the weakest element in an unretrofitted house.

back to How Retrofit Works - cripple walls

Bay Area Retrofit
Residential and Commercial Seismic Retrofits
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E-mail Howard Cook at bayarearetrofit@aol.com

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updated: Jan. 26, 2007