cripple walls reinforcement


Old 11-17-06, 11:27 AM
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Post cripple walls reinforcement

I have basement cripple walls that are insulated and covered with 4 mil plastic. I want to add plywood for earthquakes. Do I need to remove the plastic? Or should I leave it on. Do I need to drill ventillation holes in the plywood if I place it over the plastic? After I add the cripple wall reinforcemnt, I plan on putting up sheet rock to finish off the basement.
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Old 11-17-06, 03:27 PM
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cripple walls reinforcement

What makes you think you really need to use plywood for seismic refinforcement of a short wall? Plywood (properly secured) could increase the lateral wall shear resistance, but that is usually not needed for a short wall - even a flexible wood wall sitting on a rigid foundation wall.

Seismic problems are usually realated to stablity AND CONNECTIONS.

Before you go into a new project, get some advice. Seismic requirements can be very localized, so contact your local building offical (you pay his salary) for some standard local details or a local engineer.

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