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

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

Prototype Process ygjhg

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

Prototype Design Final design of prototype

Prototype Performance

Prototype Testing/Results Weight – 0.62 lb Maximum weight held – 328.26 lbs Efficiency = 532.88

Prototype Analysis flaws Hot glue -imperfect angle Weak sides

Final Bridge Goals Accuracy Drop height Weight reduction

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

Comparison

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

Final Bridge

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