Truss Analysis
A structural design project applying truss analysis and load optimization to a balsa wood bridge prototype.
This project focused on designing, analyzing, and building a balsa wood truss bridge capable of carrying the highest possible load relative to its own weight. Our design combined Pratt and Warren truss elements to balance strength, simplicity, and efficiency. I contributed to the force analysis, member optimization, and hands-on construction of the bridge, applying what we learned about tension, compression, equilibrium, and axial deformation from Mechanics of Materials. The final structure was fully analyzed using the method of sections and joints, then built and tested to compare theoretical and experimental performance.
We were given limited materials and strict dimensional constraints, forcing us to design a truss that was both light and strong. The main challenge was finding the right balance between buckling resistance and weight, especially since balsa wood performs much better in tension than compression. We also had to make sure that every member carried load efficiently while staying within the material limits.
Our final design used optimized member sizing and a hybrid Pratt–Warren configuration to distribute loads evenly. Members under high compression were reinforced with thicker cross-sections, while tension members used smaller, lighter pieces to save weight. The bridge achieved a load-to-weight ratio of 292.5, showing solid structural performance for the material and time constraints. This project strengthened my understanding of structural analysis, member design, and practical fabrication.
Key Features
- Truss Design
- Structural Analysis
- Fabrication
- Load Testing
- Material Optimization
- Real-Time Data Output