Before (left) and after (right) images of a crawlspace in the process of being retrofitted. Plywood is bolted in place to brace the short walls in the crawlspace. Credit: California Earthquake Authority

Before (left) and after (right) images of a crawlspace in the process of being retrofitted. Plywood is bolted in place to brace the short walls in the crawlspace. Credit: California Earthquake Authority

Before (left) and after (right) images of a crawlspace in the process of being retrofitted. Plywood is bolted in place to brace the short walls in the crawlspace. Credit: California Earthquake Authority

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