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Title: Log Cabins

There is nothing that I'm aware of specific to seismic design. However, here's a list of resources for other information regarding log structures. Perhaps you can find some contacts through some of these sources:

1.  NAHB Log Homes Council, 15th & M St., NW, Washington, D.C.  20005, 202-822-0576. Building Systems Councils' Hotline at 800-368-5242, ext. 162; or write: Log Homes Council, National Association of Home Builders, 1201 15th Street, NW, Washington, DC 20005.

2.  "Visual Stress Grading of Wall Logs and Sawn Round Timbers Used in Log Timbers", by Edwin J. Burke, Ph.D., Univ. of Montana, BOCA Magazine, 31(2): 28-34.

     Abstract:  The author of this article, a professor of Wood Science at the Univ. of Montana's School of Forestry, explains the need for, history of and process of stress grading of logs used in the construction of log homes, and offers practical information for code officials encountering this type of construction system.

Dr. Edwin J. Burke
Wood Science Laboratory
School of Forestry
University of Montana
Missoula, MT 59812

3.  ASTM Standard D3957-90(1996)e1 Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings distinguishes between two types of sawn or machined timbers with different grading rules for each. Sawn Round Timbers and Wall Logs are defined.

4. International Log Builders Association
PO Box 775, Lumby, British Columbia V0E 2G0 Canada
Phone (250) 547-8776 Fax (250) 547-8775
Toll-free 1-800-532-2900
E-mail: info(--nospam--at)
ILBA has a document on their website that is primarily a construction guide. It does not contain design or building code information.

5. Timber Products Inspection
1641 Sigman Road
Conyers, GA 30012
Phone: (770) 922-8000
Fax: (770) 922-1290
TP developed and now provides a nationwide grading and gradestamping program to log home manufacturers. The TP grading rules and design values are based on the nationally recognized standard ASTM D3957.

John "Buddy" Showalter, P.E.
Director, Technical Media
AF&PA/American Wood Council
1111 19th Street, NW, Suite 800
Washington, DC 20036
P: 202-463-4713
F: 202-463-2791

AWC is the wood products division of the American Forest & Paper Association. AWC's mission is to increase the use of wood by assuring the broad regulatory acceptance of wood products, developing design tools and guidelines for wood construction, and influencing the development of public policies affecting the use of wood products.

-----Original Message-----
From: admin [mailto:admin(--nospam--at)]
Sent: Monday, August 19, 2002 3:00 AM
To: awcinfo(--nospam--at)
Subject: seaint Digest for 18 Aug 2002

1                                Message:0001                            1
From: MBREngineering(--nospam--at)
Subject: Log Cabins
To: seaint(--nospam--at)

Does anyone know of a goo resource for detailing and design of log cabins
unders seismic loads.  Is there a guide that can be purchased or downloaded.