1. Technology & Development Trail Bridges – Details for Longevity, Condition Assessments and Annual Maintenance Presenter: James “Scott” Groenier, P.E. Project Leader, MTDC, WIT Prepared for: NOHVCC Conference Ontario, CA Ontario, CA March 17, 2005 March 17, 2005

2. Technology & Development 2 Introduction  Construction - Details For Longevity  Condition Assessments  Annual Maintenance  Summary

3. Technology & Development 3 Construction  Details for Longevity  Durability and Design details by Kropf Available from WIT on CD “The National Wood in Transportation Program”  Controlling Decay in Waterfront Structures by Highly & Scheffer http://www.fpl.fs.fed.us/documnts/fplrp/fplrp494.pdf

4. Technology & Development 4 Construction  Details for Longevity  Shedding water off Structures  Beveled Top Rails  Raised Low Rails

5. Technology & Development 5 Construction  Details for Longevity  Shedding water off Structures  Scupper blocks for Curbs

6. Technology & Development 6 Construction  Details for Longevity  Structure Protection  Side Rails  Wearing Surface

7. Technology & Development 7 Construction  Details for Longevity  Shedding water off Structures  Bridge Gradients

8. Technology & Development 8 Construction  Details for Longevity  Approach Ditches  Cross Drains

9. Technology & Development 9 Construction  Details for Longevity  Earth-Wood Interface  Screwing vs. Nailing

10. Technology & Development 10 Construction  Weathering Steel Corrosion Problems  Technical Advisory – T5140.22 http://www.fhwa.dot.gov/legsregs/directives/techadvs/t514022.htm http://www.fhwa.dot.gov/legsregs/directives/techadvs/t514022.htm  Environment  Marine Coastal Areas  Frequent High rains, High Humidity or Persistent fog  Locations to avoid  Tunnel Like Conditions  Low Water Crossings  10 feet – over stagnant water  8 feet – over moving water

11. Technology & Development 11 Construction  Corrosion problems with new wood treatments http://www.strongtie.com/productuse/corrosion.html  Conclusion from Technical Bulletin  Certain treatments are more corrosive than CCA.  Treated wood industry recommends use of Stainless Steel or Hot-dip Galvanized fasteners and connectors.  Check to make sure fasteners, connectors and wood treatment type are compatible.

12. Technology & Development 12 Condition Assessment  Timber Bridges – Maintenance, Rehabilitation and Replacement by Muchmore  Website for free publications: http://spfnic.fs.fed.us/wit/WITpubs/PubSearch.cfm  Bridge Inspection / Assessment  FS requires every 4 years  Trail Bridge Matrix

13. Technology & Development 13 Condition Assessment  Bridge Assessment Forms

14. Technology & Development 14 Condition Assessment

15. Technology & Development 15 Condition Assessment Stream Bank Scour

16. Technology & Development 16 Condition Assessment Foundation and Substructure

17. Technology & Development 17 Condition Assessment Stringers and Beams

18. Technology & Development 18 Condition Assessment Decking and Wearing Surface

19. Technology & Development 19 Condition Assessment Railing and Curbing

20. Technology & Development 20 Annual Maintenance  Cleaning Decks

21. Technology & Development 21 Annual Maintenance  Cleaning Tops of Sills

22. Technology & Development 22 Annual Maintenance  Bridge Approaches

23. Technology & Development 23 Annual Maintenance  Other Items  Cleaning Tops of Beams  Clearing Brush  Nailing and Replacing Decking  Repairing banks

24. Technology & Development 24 Summary  Construction - Details For Longevity  Condition Assessments  Annual Maintenance  Questions?