This is the updated design of my Short Pratt Truss Bridge made from popsicle sticks. The only difference from the original was the addition of 4 more popsicle sticks in key areas. I doubled up the angled sticks on each end, and made the lateral bracing into an X shape rather than a zig-zag pattern.
This bridge used 50 popsicle sticks, weighed 75 grams, and held 200 pounds. It’s efficiency score was 1212, which is the highest out of any popsicle stick bridge I have ever built.
Here is a video showing the testing of the bridge:
How this Bridge Broke
The video makes it pretty clear how the bridge failed. The first stick to go was on the left end closest to us (on the first part of the movie). The bridge slowly started to lean to the left as this stick was probably a weaker one, and it started to bend more and more until it finally buckled. As soon as it broke off, the rest of the bridge collapsed. This is sweet to see on this video clip because quite often the reason a bridge broke is not easily seen.
One way to help avoid this from happening on your bridges is to pay extra close attention to the quality of your popsicle sticks. If you have solid popsicle sticks that make up your bridge, then your entire structure is more likely to be solid.
Plans for this Bridge
If you want to build this bridge, I am offering the blueprints I used to build it. You also get step-by-step instructions with the purchase which clearly explain everything you need to know about building this bridge. Check out these plans today: