1. The problem statement, all variables and given/known data Hi, I have to build a Popsicle Stick bridge for Physics class. I really don't have much knowledge on bridges as most of this was to be researched. I did a lot of research but I'm having trouble deciding between these two trusses. Restrictions/Requirements: Length: 55 cm Height: 4 cm Width: 8 cm So my main problem is the type of truss to use, Howe or Pratt. The load will be focused in the center. 2. Relevant equations 3. The attempt at a solution I used a Bridge Designer program to determine the force/weight distribution for each truss. Pratt is on the top, Howe is on the bottom: The main differences are that the Pratt truss has no force on the ends and the compression members are vertical. The Howe truss has no force on the center and the tension members are vertical instead. Here's why I can't decide between the two: - The Pratt truss uses vertical compression members. Since the height restriction is 4cm, wouldn't this allow the bridge using a Pratt truss to be stronger against compression? (Compression is inversely proportional to length, according to the research I've done) - The Howe truss has no net force in the center, where the load will be placed. Does this automatically make it better than the Pratt?