2. Bridge Quest An exploration of what it takes to make a bridge. This is what we are going to learn: What resources are needed to make a bridge. How bridges work. What are the different types of bridges. What happens when a bridge fails. How bridge designs are chosen. How to design a truss of your own, using a computer program. Project: Bridge Busting Competition Build your own bridge and break it! This is what we are going to learn: What resources are needed to make a bridge. How bridges work. What are the different types of bridges. What happens when a bridge fails. How bridge designs are chosen. How to design a truss of your own, using a computer program. Project: Bridge Busting Competition Build your own bridge and break it!

3. What does it take to make a bridge?

4. How does a bridge work? Gravity pushes down and a bridge pushes back up! What happens when a bridge does not push back up as much as gravity pushes down?

5. Bridge Identification Worksheet What type of bridges are these?

6. Bridge Identification Worksheet Cont.

7. What are the differences between these two bridges?

8. How does a truss work? Uses triangles to form a ridged structure Dissipates the weight through the truss system

9. Forcing the Issue 2 Forces –Tension Pulling Force. –Compression Crushing Force Tries to bend and warp things..

10. Hollow Vs. Solid What is the main benefit of a hollow member as opposed to a solid member?

11. Is it important to keep the cost of our bridge down? How would this affect the construction and longevity of the bridge? Items to consider:

12. How can we keep the cost down? Less supports Smaller diameter tubing Hollow tubing?

13. Design a bridge over a nearby river capable of holding an 18-wheeler truck. Bridge design must flex but not break when a truck is driven over it. Your task:

14. How will you do this?

15. Some possible bridge designs:

19. How will we be graded?

21. Bridge Design Contest Bridge that costs the lowest to construct and will still hold an 18-wheeler will win an award. 2 nd and 3 rd place out of each class will be ranked accordingly