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Re: UBC 97 seismic section and NEHRP

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Ghassem.Khosrownia wrote:

     << What is going on with the UBC97 seismic requirements? They seem 
     quite different from the 94 code. Are these based on NEHRP? And why 
     are these not marked as usual as UBC would mark the changes to the 
     Thanks, Ghassem. >>
     The 1997 UBC has evolved from the 1994 NEHRP Provisions, but in reality 

     looks more like the soon-to-be-published 1997 NEHRP Provisions.  For a 
     better understanding, see your latest SEAOC Blue Book, Appendix C.
     Page 2-1 of the 1997 UBC indicates that the entire Chapter 16 has been 
     revised ... therefore no bars in the margin.
     Rick Drake, SE
     Fluor Daniel, Inc.