![]() ![]() Most post and pier houses do not provide an anchoring connection between the posts and the foundation piers. For this reason, brace end connections are typically the first elements to fail during an earthquake.Īnother area of failure is the connection of the posts to the piers. During an earthquake, these connections experience tensional (pulling) forces that nails are not designed to resist. ![]() Most diagonal braces are connected to the posts and floor framing with only 2 toenails. A common type of failure is the knee brace. Studies have shown that the foundation of the structure is the area most likely to fail during an earthquake. The system will provide guidance on how to correct, or retrofit, the vulnerable elements of the home, decreasing the likeliness of damage from earthquakes that occur in Hawai'i. We have developed this "Retrofit Expert" system to assist homeowners, who have post and pier type homes, to identify and correct the structural vulnerabilities. These homes, where the living area of the home is supported on posts placed on concrete piers, were found to have several areas of structural weakness that can fail during earthquake shaking. An evaluation of structural damage caused by the 2006 Kiholo Bay earthquakes has shown that Hawai'i homes most vulnerable to earthquake damage were post and pier type structures. ![]()
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