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RE: ASCE 7-05 Orthogonal Effects - Section 12.5.4

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Bill, per S.K. Ghosh's 2009 IBC Handbook Structural Provisions, pp. 125, 
12.5.3.a (or b) applies to the following:
	- SDC C when Type 5 plan irregularity exists,
	- SDC D-F when Type 5 plan irregularity exists, &
	- SDC D-F when "...any column or wall that forms part of two or more 
intersecting [SFRSs] and is subjected to axial load..."

If you don't have access to the book, & you need what I've described 'more 
formally, let me know & I'll scan you the page.

Glen Pappas

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of T. William (Bill) Allen, S.E. Sent: Tuesday, August 13, 2013 2:42 
 PM To: seaint-seaosc(--nospam--at)
Subject: [SEAINT-SEAOSC] ASCE 7-05 Orthogonal Effects - Section 12.5.4

.refers to Section 12.5.3. Does the Type 5 plan irregularity apply to 
Seismic Design Categories D-F? IOW, Is 12.5.3 (I'm looking specifically at 
12.5.3.a) applicable only when Type 5 plan irregularity exist even for SDCs 


T. William (Bill) Allen, S.E. (CA #2607)

University of Southern California, M.S.C.E., 1983

University of Texas at El Paso, B.S.C.E., 1977


Consulting Structural Engineers

32302 Camino Capistrano, #206

San Juan Capistrano, CA 92675

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