Separation of wood from slabs in the CBC?
Rhkr...@aol.com
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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Gerard Madden, SE
Someone about a week or two ago mentioned that a CBC supplement was issued about reducing this 8" requirement where paving occurs.
-gm
AWC Info
follows:
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.
HTH
Buddy
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
http://www.awc.org
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, <Rhkr...@aol.com> 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"
from
> exposed earth (2304.11.11.2.2) 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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Christopher Banbury
I believe the code prohibits contact between untreated wood and concrete/masonry. I don’t think there is any spacing requirement. I have seen contractors coat concrete with asphalt or put felt paper between the wood and the concrete to prevent contact. I think the truss companies just put a thin metal plate between untreated trusses and the masonry/concrete bearing wall.
Christopher Banbury, PE
President
Ark Engineering, Inc.
PO Box 10129, Brooksville, FL 34603
22 North Broad ST, Brooksville, FL 34601
Phone: (352) 754-2424
Fax: (352) 754-2412
From: Gerard Madden,
SE [mailto:gmse...@gmail.com]
Sent: Wednesday, June 18, 2008
8:30 PM
To: sea...@seaint.org
Subject: Re: Separation of wood
from slabs in the CBC?
Ralph,
Someone about a week or two ago mentioned that a CBC supplement was issued
about reducing this 8" requirement where paving occurs.
-gm
Rhkr...@aol.com
It certainly does "H."
Ralph
> 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"
from
> exposed earth (2304.11.11.2.2) 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
* Read list FAQ at: http://www.seaint.org/list_FAQ.asp
*
* This email was sent to you via Structural Engineers
* Association of Southern California (SEAOSC) server. To
* subscribe (no fee) or UnSubscribe, please go to:
*
* http://www.seaint.org/sealist1.asp
*
* Questions to seai...@seaint.org. Remember, any email you
* send to the list is public domain and may be re-posted
* without your permission. Make sure you visit our web
* site at: http://www.seaint.org
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Acharya, Suresh
I have not seen the supplement, but the existing section 2304.11.2.6 already
allows 6" clearance to wood ***SIDING***. Section 2304.11.2.2 does require
8" clearance to wood ***SHEATHING*** and FRAMING [except 6" is ok for
DSA/OSHPD projects when concrete slab or asphalt paving occurs].
Suresh Acharya, S.E.
AWC Info
wall framing:
"...except where siding, sheathing, and wall framing are of naturally
durable or preservative-treated wood"
Since the siding is presumably the lowest point of the three, that's
where it would be measured from.
Buddy