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RE: 1997 UBC Section 1634 - Non-building Structures question

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Ed:

The 2000 IBC (Final Draft plus Approved revisions) is worded in a 
manner very similar to your reasoning.  You said:
> It seems that logically the exception should apply non-building
> structures with structural systems similar to buildings since the R
> factor is typically coming from UBC Table 16-N rather than Table
> 16-P.

The 2000 IBC says, "For nonbuilding systems with response 
modification coefficients, R, provided in Table 1622.2.5-1 [which 
replaces 1997 UBC Table 16-P], the minimum value specified in Formula 
(1617.4.1-4) shall be replaced with the following:..."  Which means 
that the usual minima apply when the R value is taken from Table 
1617.6, which replaced 1997 UBC Table 16-N.

-Mike

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Michael Valley                                   E-mail: mtv(--nospam--at)skilling.com
Skilling Ward Magnusson Barkshire Inc.                  Tel:(206)292-1200
1301 Fifth Ave, #3200,  Seattle  WA 98101-2699          Fax:        -1201