1. Bridges Prof. Anthony Cioffi, P.E. Professor/Chairman New York City College of Technology/CUNY

2. How are Bridges Used? Walkways Highways/Roads Railways Pipelines Connecting Lands Crossing Rivers Stadiums Roofs

3. Types of Bridges  Arch  Truss  Cantilever  Cable-Stayed  Suspension  Beam  Moveable

4. What Makes a Bridge Stay Up? Forces – 2 Types 1 st - Compression > P ushing or Squeezing Force 2 nd - Tension > P ulling or Stretching Force

5. Arch Bridges Keystone – the wedge- shaped stone of an arch that locks its parts together Abutments – the structures that support the ends of the bridge

6. Arch Bridges How Does it Work ? “Compression”

7. Arch Bridges Where have you seen these bridges? Bayonne Bridge – N.J.Sydney Harbor Bridge Hoover Dam Bridge Apollo Bridge - Slovakia

8. High Bridge (officially, the Aqueduct Bridge) Bronx, N.Y. Steel Arch Bridge Where have you seen these bridges?

9. Hell Gate Arch Bridge, New York, Connecting Railroad Bridge from Queens

10. Cable-Stayed Bridges Piers – Supports the Towers Towers – Support the Cables Cables – Thick Steel Ropes from which the decking is suspended Decking – Supports the Roadway Pier Cable Tower Deck

11. Cable-Stayed Bridges How does it Work? Tension & Compression

12. Cable-Stayed Bridges Where have you seen these bridges? Abdoun Bridge – Amman, Jordan Puente de la Unida – Mexico Octavio Frias de Oliveira Bridge São Paulo - Brazil.

13. Zakim Bridge, Boston, MA

14. Sunshine Skyway Bridge, Tampa, FL

15. Suspension Bridges Similar to Cable-Stayed > Uses Cables for Support Tower Cable Abutment Deck Suspender Cable Pier

16. Suspension Bridge How does it Work? Tension & Compression

17. Suspension Bridges Where have you seen these bridges? Akashi Kaikyo Bridge - Japan Golden Gate Bridge – San Francisco Chesapeake Bay Bridge Virginia

18. Brooklyn Bridge, Brooklyn, NY

19. Verrazano-Narrows Bridge, New York City

20. Truss Bridge Support (Abutment)

21. Truss Bridges How does Work? Tension& Compression

22. Truss Bridges Where have you seen these bridges? Francis Scott Key Bridge - Maryland, USA Betsy Ross Bridge – Philadelphia, PA

23. Under Truss Bridge

24. NY-79 Bridge Broome County, New York Warren Truss Connections

25. Cantilever Bridge Firth of Forth-Forth Rail Bridge Edinburgh, Scotland Where have you seen these bridges? Bluewater Bridge -Port Huron Michigan

26. 59 th Street Bridge – N.Y.C. Pierre Pflimlin Bridge - France

27. Beam Bridge Chesapeake Bay Bridge-Tunnel Where have you seen these bridges?

28. Moveable Bridges Bascule Bridge Woodrow Wilson Bridge-Virginia Swing Bridge Lift Bridge London Bridge

29. Questions?

30. Build a Bridge Open the Secret Envelope!