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| | Strand Earthquake :: Seismic Monitoring and Actuation |
 | | The Magnitude 6.3, 1933 Long Beach earthquake--which generated the first accelerograph record for a local earthquake--caused fires at seven schools, prompting California to include in the Field Act a requirement that new schools be equipped with a SGSV. |
 | | In 1965, Los Angeles began requiring three accelerographs (i.e., earthquake recorders) to be installed in all buildings over 6 stories high with an aggregate floor area of at least 60,000 square feet, and in all buildings over ten stories high--in the basement, midportion, and near the top. |
 | | A study done after the Loma Prieta earthquake found that the advantage of a seismic switch is that the required inspection can discover damaged doors, hoistways, or rails that would not be detected by the alternative "ring-on-a-string" system unless the counterweight derailed or the system false triggered. |
| www.strandearthquake.com /sma.html (3307 words) |
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