The 2001 Nisqually Quake*
And Masonry chimneys
No modern masonry chimney, reinforced and strapped to the house as required by code, has failed that we know of in recent American Earthquakes.
Of course one could replace a damaged masonry chimney with a metal one, or tear it down and power vent or replace the furnace. But this seminar is about evaluating, rebuilding, repairing, restoring or otherwise saving masonry chimneys.
Masonry chimneys, many of which have served well for 100 years or more, are good looking, safe, require little maintenance and are often architecturally or historically significant. If built or retrofitted in accordance with modern codes, masonry chimneys can and do withstand earthquakes.
* The 2001 Nisqually earthquake (also commonly referred to as "The Ash Wednesday earthquake") occurred at 10:54:32 local time on February 28. The intraslab earthquake had a moment magnitude of 6.8 and a maximum Mercalli intensity of VIII (Severe). - WikipediA
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