1. Do Not Touch!
Group 4 Engineering 100 By : Jonathan Lai Andrew Hsieh Apisada Petchtes Heidi Yee

2. Designs Base shapes Truss types Bridge types Flat curve “x” shape
Triangle shape
Bridge types
Arch bridge
Flat bridge

3. Prototype Process
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4. Prototype Process Ideas Crosses on the base – horizontal and vertical
Truss structures on the sides
Arch shape

5. Prototype Design
Final design of prototype

6. Prototype Performance

7. Prototype Testing/Results
Weight – 0.62 lb
Maximum weight held – lbs
Efficiency =

8. Prototype Analysis flaws
Hot glue
-imperfect angle
Weak sides

9. Final Bridge Goals
Accuracy
Drop height
Weight reduction

10. Final Bridge Changes Lowered the platform in contact with the press.
Use of wood glue.
Reinforced supports: doubled up struts.

11. Comparison

12. Results Weight: 0.59 lb. Supported <500 lb. (closer to 200)
Efficiency: decreased
Contact points
Weight not dispersed

13. Final Bridge

14. Conclusion The prototype did better than the final
We tested two different bridges
The prototype can be improved
Weighed: 0.62 lbs
Carried 328 lbs
Final was much lighter
Weighed: 0.59 lb