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Earthquakes

  • Bolt sill plate to foundation
  • Reinforce crawl space or “cripple” walls under floor joists
  • Connect rim joists to top plates with metal brackets
  • Anchor large equipment
  • Use flexible connections on gas and water lines
  • Brace large openings on lower story6
  • Brace heavy exterior elements7

6“What You Can Do”, Structural Engineers Association of Northern California, 25 Jan 2007.

7 “FEMA Hazard Mitigation Handbook Series”, Conservationtech, 01  Feb 2007.

Bolt Sill Plates to Foundation illustration. (www.fema.gov)

Earthquakes, Magnitude 3.5 and Greater, 1974-2003. (Earthquake Hazard Program, www.usgs.com)

Earthquake Home Hazard Hunt. (www.fema.gov)


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One Response to Preparing Historic Buildings and Sites for a Disaster

  1. sonnitex says:

    Aquí en Lorca ( España) hace un mes en el terremoto los edificios más afectados fueron los de ultima creación que se supone que contemplaban la normativa contra seismos. Sin embargo los más antiguos y que no estaban construidos bajo esta normativa, son los menos afectados ¿ como se Explica eso ?

    Here in Lorca (Spain) last month in the earthquake affected buildings were the latest creation is supposed to contemplated legislation against earthquakes. But the oldest and were not constructed under this policy, are less affected how do you explain that?

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