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'R' Values

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Hi Thor:
 
Essentially that will not make any difference in your calculations, provided you make sure to use the corresponding resisting “allowable shear values” of the table for R of 4.4 or 5.5.
This goes back to the old CBC 2001 (or UBC 1997) where we had the R=5.5 established for plywood shearwalls. Where Hardy Frame had to adjust their tables based on R=4.4 For table of R=5.5.
Please refer to page 4 of the following document/link:
http://www.hardyframe.com/hardydownloads/HardySteelFraming.pdf
Regards
Khashayar “Casey” Hemmatyar, SE
California
Personal email: khemmatyar(@)hotmail(dot)com
 
-----Original Message-----
From: Thor Tandy [mailto:vicpeng(--nospam--at)telus.net]
Sent: Monday, October 05, 2009 1:48 PM
To: SEAInt
Subject: 'R' Values
Showing my ignorance of IBC/UBC through little use thereof.
 
What makes up the 'R' value?  I'm trying to align some Hardy Frame table
values (quoting 'R'= 5.5 & 4.4) with the local 'R' for loads I'm using here
in BC.
No doubt apples & oranges .  :^)
 
Thanks
Thor A. Tandy P.Eng, C.Eng, Struct.Eng, MIStructE
Victoria, BC
Canada