1. Folded Plate Bridge: Steel Alternative for Short Span Bridges Maury Tayarani Accelerated Bridge Program MassDOT

2. Folded Plate Girder System is currently applicable to simple span bridges with lengths up to 60 ft.

3. Folded Plate Girders are fabricated using press breaks

4. The bend locations are very precisely determined

5. The fabrication process requires rotating the girder

7. 1 3 2 4 Fabrication Steps are Minimal 1- Bending girders 2- End Plates
3- Minimal Tie Plates
4- Shear Studs 1 3 2 4

8. To Resolve Availability and Rapid Delivery
1- Plate thicknesses are limited to ½ or 3/8 inches
2- Total plate width is limited to 118 inches

9. Stable Shape During Casting Deck
No need for internal cross frames
No need for external cross frames

10. Design is conservatively based on girders being supported at two ends, when casting deck. The actual production is based on girder sitting on prestress bed and supported continuously.

11. Open bottom allows easy inspection

12. Experimental work Concept has been extensively tested

14. 7,500,000 Cycles

15. Shear Test

16. Uxbridge Project – Boston Mass
Opened to Traffic on Nov 2011

17. Folded bending – Kansas
Galvanizing – Valmont, Kansas
Casting deck- Carrara- Vermont
Contractor – John Rocchio
Design – Highway Bridge Services
Independent design check- G.F.
Owner – MassDOT
Bridge instrumentation – University of Mass

18. Four Folded plate with partial
Depth deck delivered to site

19. Edge girders will have the curbs
cast

20. Anchor bolts are provided to bolt
The railing onsite

21. Fabrication

22. Delivery of girders to precast
Plan for casting sub-deck

23. Girder Delivery

24. Deck Forms

25. Steel Reinforcement

26. Casting Deck

27. Unit Ready for Delivery

28. Rigging for Lift

29. Placing Girder Unit

30. Placing Girder Unit

31. Girder Ends

32. From Below

33. Finished Structure

34. Finished Roadway

35. Dr. Atorod Azizinamini