Where can I find information on timber bridge design and construction?

For information on timber bridge design and construction, contact one of the following organizations:

1. Forest Products Laboratory's Timber Bridge Design Manual. (608) 231-9200. For more information, visit http://www.fpl.fs.fed.us

2. American Institute of Timber Construction's revised Timber Bridge brochure. Visit their website at http://www.aitc-glulam.org/

3. National Wood in Transportation Information Center
USDA Forest Service
180 Canfield Street
Morgantown, WV 26505
Phone: (304) 285-1591 
Fax: (304) 285-1596
Email: werc@fs.fed.us
Website: http://www.na.fs.fed.us/werc/