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Earth/Paving to Wood Separation

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There's a new section added in the 2007 Supplement to the 2006 IBC as

2304.11.2.5 Wood siding. Clearance between wood siding and earth on the
exterior of a building shall not be less
than 6 inches (152 mm) or less than 2 inches (51 mm) vertical from
concrete steps, porch slabs, patio slabs, and
similar horizontal surfaces exposed to the weather except where siding,
sheathing, and wall framing are of naturally
durable or preservative-treated wood.

Although I think the section number should be 2304.11.2.6 to be
consistent with the current code.



John "Buddy" Showalter, P.E. 
Director, Technical Media 
AF&PA/American Wood Council 
1111 19th Street, NW, Suite 800 
Washington, DC 20036 
P: 202-463-2769 
F: 202-463-2791 

The American Wood Council (AWC) is the wood products division of the
American Forest & Paper Association (AF&PA). AWC develops
internationally recognized standards for wood design and construction.
Its efforts with building codes and standards, engineering and research,
and technology transfer ensure proper application for engineered and
traditional wood products.

The guidance provided herein is not a formal interpretation of any AF&PA
standard.  Interpretations of AF&PA standards are only available through
a formal process outlined in AF&PA's standards development procedures.


Subject: Earth/Paving to Wood Separation
From: "Dave Adams" <davea(--nospam--at)>
To: <seaint(--nospam--at)>

Hello all,

I'm pretty sure I'm missing something and think someone may be able to
direct me to the right code section. For earth to untreated wood, the
2007 CBC (2006 IBC) requires an 8" separation, but I cannot find a
similar provision for untreated wood to paving separation, other than
the exception for DSA/OSHPD, and even then it seems extreme (6").


Dave K. Adams, S.E., P.Eng.
Lane Engineers, Inc.
Tulare, CA

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