I'm building a bridge out of balsa-wood strips for school, and wanted some advice. These are the specifications:
- Height: 2 to 6 in
- Length: 12 inches, plus 1-3 inches on each side resting on tables
- Width: 2 +- 1/16 in at the base
- Weight: <= 50 g
The objective is maximum efficiency (load it can hold divided by weight), not just load. It will be tested with a block placed in the middle of the base that has a bucket hanging from it. The bucket will be filled with sand slowly.
What type of truss do you recommend I use for this structure? Currently, I was planning on a warren truss-type configuration, but with an arch. What other trusses would you suggest? What height should I use? What length?
Any and all tips or resources are greatly appreciated. Also, I would love to know the reasoning behind any choices (just for personal interest).