PC-2025-16 - Laserfiche WebLink

ENGEO INCORPORATED 5150.100.101 May 2, 2008 Page 8 5.4.1 Ground Rupture As noted above, the site is located within a State of California Earthquake Fault Zone, for the active Calaveras fault. Based on the findings of our previous fault exploration, recommendations for building setbacks have been provided as shown on Figure 2. Provided that the setbacks recommendations are respected, the potential for fault rupture through the proposed building site is considered low. 5.4.2 Ground Shaking An earthquake of moderate to high magnitude generated within the San Francisco Bay Region could cause considerable ground shaking at the site, similar to that which has occurred in the past. To mitigate the shaking effects, all structures should be designed using sound engineering judgment and the 2007 California Building Code (CBC) requirements, as a minimum. Seismic design provisions of current building codes generally prescribe minimum lateral forces, applied statically to the structure, combined with the gravity forces of dead-and-live loads. The code-prescribed lateral forces are generally considered to be substantially smaller than the comparable forces that would be associated with a major earthquake. Therefore, structures should be able to: (1) resist minor earthquakes without damage, (2) resist moderate earthquakes without structural damage but with some nonstructural damage, and (3) resist major earthquakes without collapse but with some structural as well as nonstructural damage. Conformance to the current building code recommendations does not constitute any kind of guarantee that significant structural damage would not occur in the event of a maximum magnitude earthquake; however, it is reasonable to expect that a well-designed and well-constructed structure will not collapse or cause loss of life in a major earthquake (SEAOC, 1996).