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Originally Posted by doubleurx
Many buildings were not required to be retrofitted. In fact there are many buildings out there that could suffer major damage. Most of those are limited to the masonry buildings. Were the retrofit issue got triggered was when alterations to the building were proposed by the owners or if they housed anything to do with the public or generated enough occupant load to justify the retrofit. Wood buildings are probably the safest. You know all those school "portable" classrooms with the wood foundations. They look flimsy but actually do very well in earthquakes because of how much the wood can flex. Steel also is very flexible. Masonry bad - steel wood good!
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just to add to that, concrete is bad also. So buildings with parking garages at the bottom would also equal bad
