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The J.A.D. Bridge

On June 10, 2011, the J.A.D. Bridge Builders presented their innovative balsa wood bridge project to the UTA Summer Engineering Access Class. The objective was to create a scalable model bridge that spans a gorge, meeting strict dimensional requirements while supporting static and dynamic forces. Utilizing principles of civil engineering, including truss design and equilibrium concepts, the team successfully constructed a prototype that not only met but exceeded weight-bearing predictions. This project showcases the importance of collaboration and creativity in engineering challenges.

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The J.A.D. Bridge

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  1. The J.A.D. Bridge By Andrés Espinosa, Jeremy Latief and Daniel Dahlinger June 10, 2011

  2. Civil Engineering Bridge • J.A.D. Bridge Builders and Co. • The J.A.D. bridge • Andrés Espinosa, Daniel Dahlinger and Jeremy Latief • Presenting to the UTA Summer Engineering Access Class • June 10, 2011

  3. Outline • Objectives • Introduction • Problem • Analysis • Results • Conclusion

  4. Objectives • To make a bridge out of balsa wood. • The bridge must meet the requirements and restrictions of: • Length – min 10” , max 12” • Width – min 2”, max 3” • Height – min 2”, max 4” • The bridge must be able to sustain 15 pounds of static force and 15 pounds of dynamic force.

  5. Introduction • What is a Civil Engineer? A civil engineer creates structures that are beneficial to the community. • A bridge is a structure built to span physical obstacles such as a body of water, valley, or road for the purpose of providing passage over the obstacle. • Truss bridges use triangle shapes because of their strength.

  6. The Problem • It is 1910 and there is a gorge that needs to be crossed. This gorge spans 800ft and the minimum and maximum lengths for the bridge are 1000ft-1200ft. The minimum and maximum width of the bridge is 200ft and 400ft. The minimum and maximum height of the bridge is 200ft and 400ft. • The scale from prototype to actual bridge is 1 in. to 100ft. • To build the prototype, we have been given exactly 15 two ft. long balsa wood sticks and one bottle of tacky glue. • The prototype must support 15lbs. of static and dynamic force.

  7. Analysis • We will build a Trapezoidal Bridge out of X- shapes and triangles. • Some equations we will use are the Pythagorean Theorem, Stress, statics and Equilibrium Concepts. • We will not be able to use any technology besides the materials and equipment provided.

  8. The results • Our Company has successfully built a prototype bridge that we predict will support twenty pounds of static force and at least fifteen of dynamic force. Our work has developed a prototype bridge that will be constructed across the gorge.

  9. Conclusion • The bridge will be successful in holding the desired weight and some more. Due to our successful results, this bridge design will be used for future bridge development.

  10. THANK YOU!! • Thank you for listening to our presentation, also thank you to all the mentors that have helped us successfully complete this project! We couldn’t have done this much without you!!!

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