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RE: 2013 Codes

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I now see that the referenced standard is the 2012 NDS. maybe the diaphragm
tables have been revised
On Nov 6, 2013 4:09 PM, "Joseph Grill" <jrgrill55(--nospam--at)> wrote:

> Got the sarcasm, no problem.  Aren't we still taking this new factored 
> wind load through diaphragm and shear wall tables based on "ASD" values? 
> Will we have to "unfactor" for timber design?  I haven't dove that far 
> into the new code. Just testing the waters.
> On Nov 6, 2013 3:51 PM, "Joel Adair" <jadair(--nospam--at)> wrote:
>> Last year, I did a project in Odessa, TX, where they had already adopted
>> IBC 2012, and hence, ASCE 7-10.  At the time, RAM Structural System
>> hadn't incorporated the new wind provisions, so I did a little exercise
>> to compare the results of the new method -- with wind pressures
>> calculated at ultimate levels, then used in load combinations with a
>> factor of 1.0 for LRFD or 0.6 for ASD -- versus the old method.  In the
>> end, the new method resulted in forces about 4% lower than the old 
>> method for my particular case.  In other words, you wind up at 
>> essentially the same place, but take a completely different path to get 
>> there.  I used the software-generated wind forces, based on ASCE 7-05 
>> and went about my business.
>> It sure threw off the curtain wall manufacturer, though.  Their engineer
>> was making a fuss about how my general notes required them to design for
>> 120 mph, when they've been using 90 mph for years.  I had to explain 

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