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/documnts/misc/em7700_8--entire-publication.pdf
  
  2. American Institute of Timber Construction's revised Timber Bridge brochure. (303) 792-9559. 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: na_WIT@fs.fed.us
  Website: http://www.fs.fed.us/na/wit/