The following sites are recommended for visiting as they offer excellent information on timber framing:
www.timberframe.org
www.tfguild.org
www.cwc.ca/applications/post_and_beam/timber.php
www.timberbuilder.com
Books:
- The Timber-Frame Home
- Tedd Benson, Taunton Press, 1989
Other interesting sites:
www.coveredbridges.ca