The PROCESS of determining whether you have a Safe House or not requires a number of activities that are completed by a number of different people with different skill sets. These activities are shown in the pictures and information shown below. Historically, wood constructed buildings have faired quite well during earthquakes but the procedures shown below are needed to determine the need for remedy.
A house is selected for a review of whether it is a safe house or not. The selection is based on the collective knowledge of the types and styles that have posed a significant risk in the past.
Next, physical data is collected for the selected house from the data base or by collecting field data. This includes all materials used in construction, including their weights sizes and properties.
This data is fed into a computer to build a model of the house that will be used to calculate how the house performs during an earthquake, or alternatively, the input data is compared to the data base.
The data to be input is compared to a data base of other houses for which earthquake loads have been calculated, or a new math model is developed for a new computer analysis.
If the data input does not match a previously run model, the model is modified, and a computer program is used to analize the math model using the site specific earthquakes expected for the location of the house.
The data base, or the results of the computer analysis, are used to define the areas of the building that need additional lateral force resisting systems and the restraints are selected to meet the goal of being able to shelter in place.
COMPARE TO DATA BASE
CHANGES DESIGNED AND IMPLEMENTED
After retrofitting work is designed and completed the house is designated as a Safe House and the property is added to the SafeHouse Registry and the information will be sent to Zillow, Trulia and Google.
From the data base, or the results of the computer analysis, the areas of the building are identified that need attention, and the necessary repairs and retrofitting work is defined and implemented.
The data base is scanned to find matches that can be applied with only scalar modifications for small variations in stiffnesses, weights or peak ground accelerations that apply to the new site.
Wave Travel Times
Strain Gage Output
* Solid Inner Core
1600 Miles (Dia.)
* Molten Outer Core
* Stiffer Mantle
* Outer Crust
5 to 25 Miles