Tom's Tips for Structure Competitions
- Offers basic tips on model bridges.
- http://www.ecs.syr.edu/centers/outreach/BridgeBuildingTips%5B1%5D.pdf

Bridge Over Cardboard Water
- Contains instructions on how to build a toothpick truss bridge. Includes a print-friendly version.
- http://www.yesmag.bc.ca/projects/bridge.html

Model Bridge Design
- Tips and advice about designing and building model bridges from basswood and balsa.
- http://www.garrettsbridges.com

Technology and Bridge Design
- A bridge building activity with glossary terms.
- http://projects.edtech.sandi.net/pbmiddle/bridges-tech/

Physics Balsa Bridge Building Contest
- Records, rules and tips for this twenty year old contest along with hundreds of photographs of bridges.
- http://www.balsabridge.com/index.htm

Bridge Building Contest
- Description of a model bridge building contest. Also has tips on how to start your own contest.
- http://www.iit.edu/~hsbridge/database/search.cgi/:/public/index

Balsawood Structure Design
- An in depth analysis of test results of a balsa wood structure.
- http://www.literaturenotes.com/basementpapers/papers/stack41_2.html

ABCD's Bridge Design Tips for Kids
- Provides tips for bridge-building projects, including topics such as form, connections, properties of balsa wood, links, and a bibliography.
- http://www.abcdpittsburgh.org/kids/kids.htm

Balsa Wood Bridge Info
- Very detailed instructions on the construction of model bridges. Also has charts showing the properties of Balsa wood.
- http://www.zimsweb.com/balsa/information/info.htm

Bridge Design Tips
- Has specific advice for IOUM competitions, but also general model bridge building tips.
- http://php.indiana.edu/~iuom/structure.html