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Separation of wood from slabs in the CBC?

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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.

On Wed, Jun 18, 2008 at 2:04 PM, <Rhkratzse(--nospam--at)> wrote:

> Can anyone help me find the requirements in the Calif. bldg. code for
> required separation of untreated wood from slabs on grade?  It's 8"
> exposed earth (2304. but I don't find the similar
requirement for
> distance from a slab.
> Also, is anything other than a concrete slab adequate to allow
reduction of
> the 8" distance?  Gravel, loose pavers, brick pavers, etc.?
> TIA,
> Ralph Hueston Kratz, S.E.
> Richmond CA USA

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