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American Wood Council

Where can I find information on evaluation, maintenance and repair of existing structures?

NDS Archives + Historical Design Values

1991-1997 NDS Commentary – Historical Development

Western Wood Products Association – In-Grade Lumber Testing and Design Values for Dimension Lumber

Wood Handbook – Wood as an Engineering Material

Wood and Timber Condition Assessment Manual, First Edition – Hardcopy 
Wood and Timber Condition Assessment Manual, Second Edition – Electronic (PDF) 
by Robert J. Ross and Robert H. White
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726
Phone: (608) 231-9200
Website: http://www.forestprod.org
Main Phone: (608) 231-1361 ext. 202

Here's contact information for the lead author:
Dr. Robert J. Ross
E-mail: rjross@fs.fed.us
Phone: (608) 231-9221
Website: http://www.fs.fed.us/research/people/profile.php?alias=rjross

Other resources:

Evaluation, Maintenance and Upgrading of Wood Structures: A Guide and Commentary. Published by: ASCE (Proceedings of a session at Structures Congress, 1986). Edited by: Alan Freas. Available at https://play.google.com/store/books/details?id=6lghAGA7OLwC 

Evaluation and Upgrading of Wood Structures: Case Studies. Published by: ASCE (Proceedings of a session at Structures Congress, 1986). Edited by: Vijay K. A. Gopu. Available at http://cedb.asce.org/CEDBsearch/record.jsp?dockey=0050270
ISBN # 0872625508

Grading of existing timbers

West Coast Lumber Inspection Bureau (WCLIB) will grade existing timbers. Here's contact information:

PO Box 23145 
Portland, Oregon 97281-3145 
Fax: 503-684-8928

Historical Considerations in Evaluating Timber Structures
R. L. Tuomi and R. C. Moody, Engineers 
Forest Products Laboratory U.S. Department of Agriculture 

Fire and Smoke Repair

Restoration Industry Association Guidelines for Fire & Smoke Damage Repair, 2nd Edition

Classic texts online

Rankin, William John MacQuorn (1866): Useful Rules and Tables relating to Mensuration, Engineering, Structures, and Machines, Charles Griffn and Company, London, UK.
Includes timber design properties (see p.199).

Johnson, J.B. (1904): The Materials of Construction - A Treatise for Engineers on the Strength of Engineering Materials, Fourth Edition, John Wiley & Sons, New York, USA.
Comprehensive strength of materials text for typical materials of the time, including timber (see p.236-238).

Ketchum, Milo S. (1918): Structural Engineers Handbook - Data for the Design and Construction of Steel Buildings and Bridges, Second Edition, McGraw-Hill Book Company Inc., New York, USA.
Includes timber Bridges and trestles (see p.298).

Jacoby, H.S. (1909): Structural Details or Elements of Design in Timber Framing, John Wiley & Sons, NY, USA.
An early authoritative text on timber detailing, joints, connections, design, and more.


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