A licensed contractor can complete a retrofit for houses with cripple walls shorter than four feet, or a skilled homeowner can do it, following a standard plan set. Typically, Plan Set A is used in Northern California, and Standard Plan Set 1 is used in Southern California. If a house has cripple walls taller than four feet, or if it’s on a steep slope and has a stepped cripple wall, the homeowner will need an engineered design. The homeowner should hire a licensed structural or civil engineer to advise on the retrofit efforts. |
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