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RE: SEISMIC: Design in Pakistan; General Questions

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On February 23, 2010 at 4:09 PM Harold Sprague <spraguehope(--nospam--at)> wrote:

Regardless of the code, you need to ask yourself, what is good engineering practice?  I would be inclined to use as good of information as possible for the Ss and S1 and use the ASCE 7-05.  There are very good engineering reasons that the UBC-97 was superseded regardless of any jurisdiction having authority.

Harold, you're bolstering my own (internal) argument here, so no problem.


Can you answer me why they have TWO figures each for S1 and Ss in the UFC 3-310-01 publication? The "10/50" value of each is exactly 50% of the "normal" value. What is the significance?