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Re: Seismic loads using ASCE 7

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We have decided to use the values obtained with simplified lateral and wind since it gives values closer to former UBC load values. Using Equivalent Lateral method we are getting values in the range of .115 - .148  which we are not comfortable with either.
In a message dated 6/6/2008 9:40:46 A.M. Pacific Daylight Time, davea(--nospam--at) writes:

Happy Friday, everyone!


One of the things that we are sort of struggling with here (old “zone 3” country) is that we are finding seismic loads via ASCE 7 wind up being less (sometimes uncomfortably) than what we used to calculate using the 1997 UBC.  As a result, we’ve sort of adopted our own internal “company minimum seismic coefficient” that we are comfortable with.  Are most people discovering the same thing and what are your thoughts?




Dave K. Adams, S.E., P.Eng.

Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA

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