About this 3D model

These pieces are to allow the build and experimentation of a bridge with truss system to demonstrate diffrent forces on different shapes of bridges. I wanted to bring this to life as a visual aid always made the concept much easier to learn, and if I could put it together myself it stuck. This bridge builder can demonstrate how different types and sizes of bridges will act differently, and is a good visual aid to learning about the forces acting on each member. Comparable to kit on Amazon for $32. This takes $3-4 in PLA filament. https://www.amazon.com/Walthers-Cornerstone-Kit-Single-Track-Bridge/dp/B000X4ILTK/ref=sr_1_85?keywords=bridge+kit&qid=1571901038&sr=8-85