Bridge Report

2. Bridge Report Team Total Domination

3. Outline • Introduction…………….. Zach Chaviers • Prototype……………….. Ali Nikkhah • Final Design……………. Bobby Schneider • Conclusion……………… Derrick Wang Introduction Prototype Final Conclusion

4. Problem • Build most efficient bridge • Efficiency: • Limited to 125 tongue depressors Introduction Prototype Final Conclusion

5. Background • Warren Truss • Component testing • Four-step process Introduction Prototype Final Conclusion

6. Prototype Design • 3 preliminary designs • Criteria for design • Simple • Triangle-based • Allow for easy layering Introduction Prototype Final Conclusion

7. Construction • Warren Truss design used • Built quickly • Main goal: test structure Introduction Prototype Final Conclusion

8. Before Testing Introduction Prototype Final Conclusion

9. Test • Stable load increase • Bent at joint • Support popped out Introduction Prototype Final Conclusion

10. Test Introduction Prototype Final Conclusion

11. Results • Max load 397 pounds • Efficiency: 630 • Joints weak Introduction Prototype Final Conclusion

12. Final Design • Fix weaknesses • Joints • Glue type • Precision • Symmetry Introduction Prototype Final Conclusion

13. Construction • Graph paper • Clamping • Glue Coating Introduction Prototype Final Conclusion

14. Before Testing Completed Final Bridge Introduction Prototype Final Conclusion

15. Test • Stable load increase • Twisted • Did not break Introduction Prototype Final Conclusion

16. Test Introduction Prototype Final Conclusion

17. After Testing Dead Bridge Introduction Prototype Final Conclusion

18. Results • Max load 811 pounds • Efficiency: 1080 • 71% more efficient Introduction Prototype Final Conclusion

19. Summary • Truss Design • Prototype performed well • Minor changes made • Improved performance Introduction Prototype Final Conclusion

20. Improving Final Design • Stabilizers created rectangles • Add triangles to prevent twisting Introduction Prototype Final Conclusion

21. References • http://cee.carleton.ca/Exhibits/Tacoma_Narrows/ • http://www.nwrain.com/~newtsuit/recoveries/narrows/narrows.htm • http://www.bridgemeister.com/pic.php?pid=839 Introduction Prototype Final Conclusion

22. Any Questions?

23. Team TOTAL DOMINATION Ali Nikkhah Zach Chaviers Derrick Wang Bobby Schneider