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What’s new in Bridges ABCD March 2019

Explore the latest updates in bridge design, rehabilitation under LRFD specs, emergency vehicle guidelines, and evolving standards. Stay informed to ensure compliance and efficiency in infrastructure projects.

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What’s new in Bridges ABCD March 2019

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  1. What’s new in Bridges ABCD March 2019 Tim Keller, Administrator Office of Structural Engineering

  2. Agenda • New look for Bridge Design Manual • Bridge Rehabilitation – LRFD • Load Rating & Emergency Vehicles • Standards Update • Odds & Ends • Questions for Tim ABCD March, 2019

  3. New Look for BDM • New Name – BDM 2019 • No longer BDM 2007 AND BDM 2004 • Two Column Format • Why the change ??? ABCD March, 2019

  4. New Look for BDM ABCD March, 2019

  5. New Look for BDM ABCD March, 2019

  6. New Look for BDM Phase In Plan • Completed and included in Jan. 2019 DRRC update • Section 100 - General • Section 400 - Rehabilitation and Maintenance • Scheduled for Jan. 2020 DRRC update • Section 200 - Preliminary Design • Section 300 - Detail Design • Sections 200 & 300 modified ABCD March, 2019

  7. New Look for BDM Phase In Plan • No Schedule yet: • Section 500 – Temporary Structures • Section 600 – General Notes • Section 700 – Detail Notes • Section 800 – Noise Walls • Section 900 – Load Rating • Section 1000 – ODOT Supplement to LRFD Specs. ABCD March, 2019

  8. Rehabilitations – LRFD Specs Since Standard Spec. is no longer being supported – it’s time We have done this once before when we went from ASD to LFD. ABCD March, 2019

  9. Rehabilitations – LRFD Specs • Projects should not fundamentally change due to which specification is being used. • Overlay projects should remain overlay projects • Deck replacements remain deck replacements • etcetc ABCD March, 2019

  10. Rehabilitations – LRFD Specs • Project may need a design exception • BDM Section 401.4 gives guidance on when design exceptions are required • Design exception would not be required for an overlay project unless operating rating is below 1.0 • Projects that do not require a new load rating will not require a design exception ABCD March, 2019

  11. Rehabilitations – LRFD Specs • Structural Capacity Design Exceptions • Tim signs them for Director • What do I look for: • Is it a freeway/interstate mainline bridge? • What is the truck traffic? • Is there an identified change in land use that will increase truck traffic? • Conditions of the bridge? • Does the bridge show any signs of distress? ABCD March, 2019

  12. Rehabilitations – LRFD Specs Rehab project - BDM gives guidance on minimum structural capacity. Minimum structural capacity different than HL93 should be included in scope or identified very early in project development. ABCD March, 2019

  13. Emergency Vehicles ABCD March, 2019

  14. Emergency Vehicles FAST Act established these vehicles and made them legal to be used on the Interstates and within reasonable access of the Interstates Fast Act – States can NOT require special permits for EV’s to operate on Interstate or reasonable access to Interstates. ABCD March, 2019

  15. Emergency Vehicles ORC states that fire trucks responding to an emergency have no weight restrictions. ODOT Chief Legal Office – fire trucks responding to an emergency are not in violation of the ORC if driven over a load posted bridge. ABCD March, 2019

  16. Emergency Vehicles FAST Act made the EV’s legal on the Interstate System and on the routes within reasonable access to the interstate. BDM Section 905 - EV2 and EV3 are now designated legal loads ABCD March, 2019

  17. Load RatingEmergency Vehicles • FHWA Memo dated November 2016 – States must load rate bridges for EV’s. • If a State allows emergency vehicles to operate w/o restriction (Ohio), load rate entire inventory. • Post Bridge if rating factor is below 1.0 ABCD March, 2019

  18. Load RatingEmergency Vehicles ABCD March, 2019

  19. Load RatingEmergency Vehicles ABCD March, 2019

  20. Load RatingEmergency Vehicles December 30, 2019 Deadline: ABCD March, 2019

  21. Load RatingEmergency Vehicles • ODOT – 604 bridges • 254 bridges - in house • 350 bridges - 3 consultant contracts in place • Counties – 246 bridges • ODOT paying for 50% for consultant work • 148 can use ODOT spread sheets C. Municipalities – 43 bridges • ODOT currently has 4 consultants under contract for Muni Inspection program which includes this work. D. Ohio Turnpike – 32 bridges done by Consultant • OTC inspection program includes this work. ABCD March, 2019

  22. Load RatingEmergency Vehicles December 30, 2022 Deadline: May ODOT Programmatic OSE will select 4 consultants to perform approximately 1820 ODOT bridge load ratings. To fully comply with FHWA mandate, ODOT will invest approximately $7 million. ABCD March, 2019

  23. Load RatingEmergency Vehicles ODOT is updating all of the load rating files to BrR. BrR files are necessary as ODOT is updating permit system which requires BrR input files. ABCD March, 2019

  24. Standards Update Sean Meddles creates a video of the changes to the standards – Standard Drawings, Manuals, & Specifications. This is second time we have done this. The video for the January 2019 updates is posted on the OSE web site. ABCD March, 2019

  25. Standards Update ABCD March, 2019

  26. Standards Update ABCD March, 2019

  27. Odds & Ends Mohammad Tariq is retiring end of March. Replacement ????? ABCD March, 2019

  28. Questions for Tim ABCD February, 2019

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