Find the house that looks like yours and discover what kind of seismic retrofit you need.
A seismic retrofit contractor works on homes like this typical house built between 1900 and 1940. There is a wall between the foundation and the floor you walk on. This wall, called a cripple wall, can collapse in an earthquake causing catastrophic damage. You may want a seismic retrofit contractor to inspect it. Approximately 90% of the homes in the older parts of the Bay Area have cripple walls and require cripple wall retrofits. If you have three or more steps leading to the front door you probably have a cripple wall. Seismic Retrofit Contractors can help you with this. Read more →
After approximately 1940, houses were no longer built with cripple walls unless they were on a slope. These houses do extremely well in earthquakes because the floor can be attached directly to the foundation with steel. These retrofits are usually 25% cheaper and 100% more effective. If you have less than three steps leading into the front door, this is the kind of retrofit you will need. Seismic Retrofit Contractors can help you with this.Read more →
Some cities such as San Jose have required bolting since 1927, though most did not make bolting a part of their code until December, 1956. These bolted houses on flat lots still need retrofit work because even now the building code is inadequate protection from earthquakes. You need to find a seismic retrofit contractor who understands the deficiency in the code. These kinds of retrofits are the least expensive type and are very effective. Seismic Retrofit Contractors can help you will this.Read more →
Houses with a living area above a garage have a structural weakness called a soft story. The “soft story” is the garage; the garage door opening can collapse in an earthquake causing the living area above it to fall to the ground. These kinds of retrofits rely on large steel columns and extensive concrete work which only a specialist seismic retrofit contractor should do. They are expensive but also very effective. Seismic Retrofit Contractors can help you will this.Read more →
Hillside homes are very dangerous, in fact, life threatening. Previous earthquakes have shown that standard seismic retrofit techniques that use plywood and bolts do not work on hillside homes. These retrofits require that the seismic retrofit contractor use a special building code developed in Los Angeles after the Northridge earthquake. These retrofits are very expensive, usually costing in the tens of thousands. Seismic Retrofit Contractors can help you will this.Read more →
The first thing you will hear in any earthquake preparedness class is “Don’t Panic!” That is excellent advice. However, you can be sure you will panic. Earthquakes are very frightening. I was at the center of a very large Northern California 7.2 earthquake in 1992 in a house that had not been retrofitted. It felt as if King Kong had lifted up the house and was shaking it violently. My wife and I were both knocked to the living room floor. Standing was out of the question because the shaking was so violent. Your Office of Emergency Services can help you with this. Read more →