Earthquake Retrofit Standards

Earthquake retrofit standards are, in actuality, anything but standard. Most jurisdictions either have voluntary standards or none whatsoever. The earthquake retrofitting that many people do get is often inadequate for the job. Contractors who perform these retrofits aren't always well-versed in the best methods to protect a home from an earthquake. Local building inspectors usually give these retrofit attempts a passing grade. This is because the work doesn't have to follow a standard--it just has to be exactly what the contractor wrote into the plans. As a result, many people think their home is ready for the next big one and will be very surprised when it comes.

A proper earthquake retrofit must be designed by engineers with extensive knowledge of the effects of seismic activity. They should inspect the structure and create a retrofit plan that's best for that building. After all, a three-story shopping center will have different needs than a 1930s Craftsman bungalow home.

Plan Your Own Earthquake Retrofit Standards
In residential homes, bolting the house to the foundation is a common method of protection. Older houses may have "cripple walls," wooden studs on which the entire home is supported. At a bare minimum, these need to be braced with horizontal boards. As housing standards change, retrofitting strategies change, too. If it has been seven to 10 years since your home was updated, inquire about new and more effective strategies.

Larger structures, called unreinforced masonry buildings, need qualified engineers to create plans to stabilize them. It is really up to the home or building owner to do the homework it takes to know what is needed. It's always a good idea to consult with professionals before deciding on a course of action. For more information, contact The KPA Group at www.thekpagroup.com.