Here is the Science Olympiad bridge J.C. Booth built for the Georgia State Tournament in 2005. I don’t remember exactly what place it got, but am pretty sure in placed in the top 3. This bridges uses the typical design for that year, with slight modifications.
Most of the bridges similar to this design did not have the additional diagonal bracing from the top to the bottom chords. I think this basic design is a good example of trying to figure out a problem without boxing yourself into thinking of only typical bridge designs. This design takes what you have to do and does it very simply. Most of the time, simple is better.