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Horizontal Hold Downs

Horizontal Hold Downs

Horizontal Hold Downs are used in many seismic retrofits, especially in houses with stepped foundation, where  installing a plywood shear wall is not a good option.  This is usually due to  limited access or because the foundation steps on a very dangerous hillside home are so steep that plywood shear walls simply won’t work.

Here you can see the earthquake is trying to pull the house away from the foundation and down the hill.   This pulling action is transferred to the Horizontal Hold Down which in turn pulls on the foundation where the force is resisted.

Horizontal Hold Down Hillside

HZD

 

 

 

 

 

 

 

 

 

In the photo to the right the red arrow is the concrete, the blue arrow points to where a long threaded steel rod is embedded into the concrete, the white arrow is a nut that keeps the Horizontal Hold Down shown by the green arrow from moving.

If you would like an evaluation of your building or home, please fill out this form. I will take a look on Google maps and email you back information relevant to your building or house and provide approximate costs. If you are doing your own retrofit or have any questions about your house I am happy to help you free of charge.

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San Jose,Sunnyvale, Fremont,Oakland,Berkeley
And Surrounding Areas
408-664-6355
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License Info

Works' Comp RWCC64393236
Contractors Lic #558462
Bond #SC6334450
Liability Ins PCA 1045011
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