Repetitive Member, Cr, Increase
Repetitive Member, Cr, Increase
(OP)
IBC 2006 Table 2306.2.1 Allows an increase for bending of up to 1.5 in lieu of the 1.15 that the NDS shows. The 2012 IBC finally references the 2008 Special Design Provisions for Wind and Seismic which shows this same table for the Cr increase in Table 3.1.1.1.
The problem I have is with the 2009 Code. I can not find that table in the 2009 IBC, yet the 2009 IBC has not adopted the Special Design Provisions yet. Does anyone know if there is a reference anywhere to these values for the 2009 code cycle to do I just end up using the values because they are still current and hope we don't get asked for the reference in the exact code year the city is currently using?
The problem I have is with the 2009 Code. I can not find that table in the 2009 IBC, yet the 2009 IBC has not adopted the Special Design Provisions yet. Does anyone know if there is a reference anywhere to these values for the 2009 code cycle to do I just end up using the values because they are still current and hope we don't get asked for the reference in the exact code year the city is currently using?






RE: Repetitive Member, Cr, Increase
When I am working on a problem, I never think about beauty but when I have finished, if the solution is not beautiful, I know it is wrong.
-R. Buckminster Fuller
RE: Repetitive Member, Cr, Increase
RE: Repetitive Member, Cr, Increase
Mike McCann, PE, SE (WA)
RE: Repetitive Member, Cr, Increase
Section 3.1.1 of the 2015 SDPWS:
The reference bending design value, Fb, for sawn lumber wood studs resisting out-of-plane wind loads shall be permitted to be multiplied by the repetitive member factors in Table 3.1.1.1, in lieu of the NDS repetitive member factor, Cr = 1.15.
RE: Repetitive Member, Cr, Increase
RE: Repetitive Member, Cr, Increase
RE: Repetitive Member, Cr, Increase
The 2012 IBC defers to the NDS and the 1.5 factor is found in section C3.1.1 of the 2012 NDS.
Mike McCann, PE, SE (WA)
RE: Repetitive Member, Cr, Increase