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RE: IBC v IRC

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Jason,

 

What is your Sds?

 

I’m not sure if there is a whole lot of difference. IRC SDC D2 is just a subset of IBC SDC D. I think most of the seismic detailing requirements in the IRC apply to all three sub-divisions of SDC D (D0, D1, & D2). And at this point I think the NEHRP provisions have been pretty extensively implemented throughout the IRC, so an IBC D and an IRC D2 should essentially be the same design. There may be a few wall bracing provisions specific to D2 in R602.10 and R602.11, though I would think they shouldn’t apply if you engineered the shear walls.

 

Gary

Gary J. Ehrlich, PE
Program Manager, Structural Codes & Standards
National Association of Home Builders (NAHB)
1201 15th Street, NW, Washington, DC 20005
ph: 202-266-8545  or 800-368-5242 x8545
fax: 202-266-8369
gehrlich(--nospam--at)nahb.com

Attend the 2009 International Builders' Show
January 20-23, 2009, Las Vegas, NV
www.BuildersShow.com

 

From: Jason Christensen [mailto:jason(--nospam--at)wcaeng.com]
Sent: Friday, December 19, 2008 12:20 PM
To: seaint(--nospam--at)seaint.org
Subject: IBC v IRC

 

Does anyone know the differences between the IRC SDC D2 and the IBC SDC D.  We have design a small subdivision using the IBC SDC D, but the building official wants it per IRC SDC D2.  I am just if they would be equal or similar.

 

Jason