FHWA Bridge Design Guidance No. 1 Revision Date: July 21, 2008 Load Rating Evaluation of Gusset Plates in Truss Bridges By Firas I. Sheikh Ibrahim, PhD, PE Part – B Gusset Plate Resistance in Accordance with the Load Factor Rating Method (LFR)
Open ForumsA ten-member committee made up of the County, State, City and Consultant bridge inspection professionals will update the current 2006 Manual of Bridge Inspection in order to best reflect current research and update condition ratings to a 9-0 scale. Changes will be implemented by early spring 2009.
You are encouraged to attend one of the following Open Forums in order to informally discuss revisions you would recommend to the Committee.August 12 - District 2 Office - Bowling Green 10am-NoonAugust 26 - District 8 Office - Lebanon 10am-NoonSeptember 2 - District 6 Office - Delaware 1:30-3:30September 16 - District 10 Office - Marietta 1:30-3:30September 30 - District 4 Office - Akron 1:30-3:30
Rating Truss Gusset PlatesThe Office of Structural Engineering has a new MS Excel spreadsheet for rating truss gusset plates. This spreadsheet is in compliance with FHWA's latest requirements dated July 28, 2008, using the Allowable Stress Design method.
FHWA Technical Advisory, T 5140.29 dated January 15, 2008
FHWA Technical AdvisoryUse And Inspection of Adhesive Anchors in Federal-Aid- Projects (03-21-08)
FHWA Bridge Design Guidance No. 1
Truss Gusset Rating Using Allowable Stress MethodThe Office of Structural Engineering has revised the MS Excel spreadsheet for rating truss gusset plates. This spreadsheet is in compliance with FHWA's latest requirements dated December 18, 2008, using the allowable stress rating method. For examples on section cuts and illustrations of measurements, please follow the example provided in FHWA Bridge Design Guidance No. 1.
Disclaimer: The Office of Structural Engineering is providing this spreadsheet to facilitate the use of FHWA’s guidance for rating gusset plates on truss bridges. While bridge rating personnel are encouraged to use this spreadsheet for the reason of standardizing the rating procedures, they are responsible for the accuracy of input data, output results, and all calculations ensuring safety of the public.
2009 First Quarter RevisionsRevisions have been made to the ODOT Bridge Design Manual, 2004, 2007. These revisions shall be implemented on all Department projects with a Stage 2 plan submission date after January 16, 2009.Also, revisions have been made to the following new Standard Bridge Drawings and Design Data Sheets:• Noise Barrier Specifications for Ground Mounted Applications (NBS-1-09)• Designer Notes & Sample Plans for Ground Mounted Noise Barriers (NBSDD-1-09)
Truss Gusset Rating Using Allowable Stress Method
The Office of Structural Engineering has two MS Excel spreadsheets for rating truss gusset plates. These spreadsheets are in compliance with FHWA's latest requirements dated December 18, 2008, using the allowable stress and the load factor rating methods. For examples on section cuts and illustrations of measurements, please follow the example provided in FHWA Bridge Design Guidance No. 1.
Course: Stream Stability and Scour at Highway Bridges for Bridge InspectorsDate: April 16, 2009Time: 9:00 - 4:00 p.m.Location: ODOT Central Office - Conference Room GA, 1980 West Broad Street, Columbus, OHCost: $220 per participantRegistration: http://www.nhi.fhwa.dot.gov/home.aspxIndividuals wishing to enroll in the Scour course should simply search for that course and sign up online. They will need to create an account with NHI if they are new users. (Seating is limited)
Load Rating Guidance and Examples For Bolted and Riveted Gusset Plates In Truss Bridges
2009 Third Quarter RevisionsRevisions have been made to the ODOT Bridge Design Manual, 2004, 2007. These revisions shall be implemented on all Department projects with a Stage 2 plan submission date after July 17, 2009.In addition, The Standard Bridge Drawing, Noise Barrier Specifications for Ground Mounted Applications (NBS-1-09), has been revised. All projects sold after July 17, 2009 that reference NBS-1-09 should reference the revised drawing.
NOTICE TO BRIDGE DESIGNERS:
The guardrail post spacing on prestressed box beam bridges shall be referenced to each prestressed beam end. Failure to show this dimensional reference in the bridge plans, often results in project delays while the fabricator requests information in order to finalize the shop drawings. Refer to BDM Section 302.5.1 for additional detailing issues associated with guardrail post layout.
"Draft" Bridge Inspection Manual - CommentsThe Draft Manual of Bridge Inspection will be issued in September 2010. Please review, comment and send your comments prior to publishing.
Bridge Inspection Level 1 - BasicThis course is intended for new bridge inspectors. It is part one of two and 100% attendance for both and a 70% or higher exam grade in Level 2 are required in order to pass the “Comprehensive Training Course” referenced in the NBIS (23CFR650c) and the Bridge Inspector's Reference Manual.
Bridge Inspection (Advanced - Level 2)This course is intended for new bridge inspectors. It is part two of two and 100% attendance for both and a 70% or higher exam grade in Level 2 are required in order to pass the “Comprehensive Training Course” referenced in the NBIS (23CFR650c) and the Bridge Inspector's Reference Manual.
Manual of Bridge Inspection 2010This revision will take affect April 2, 2011 however inspectors are encouraged to begin using this revised manual (except BR-86 Items 20, 49 and the last four boxes of 69). Paper copies, that are double-sided and tabbed, will be made available for purchase starting in November. Training sessions, for those interested, will be made available before April 2, 2011. Questions may be directed to Michael.Brokaw@dot.state.oh.us. Watch this website for more updates.
ODOT Manual of Bridge Inspection UpdateThe ODOT Office of Structural Engineering will be presenting details on the 2010 update of the ODOT Manual of Bridge Inspection. Topics include BR-86 modifications, condition appraisial clarification, and Inspection Program responsibility clarification. This class is intended for County, City, Village and Consultant staff members responsible for Bridge Inspection. Registrations will be accepted on a first come, first serve basis. There is no registration fee. This course is being offered through LTAP. Registration can be completed by filling out and submitting the course registration form located at the following link: http://www.dot.state.oh.us/Divisions/Quality/LTAP/Pages/TrainingCourseFlyers.aspx.
MEMORANDUM ON LOAD RATING OF NEW BRIDGESAll new and replacement bridges, with preliminary design starting after October 1, 2010, and requiring load rating, shall be load rated at inventory and operating levels by the AASHTO LRFR method to comply with FHWA requirements. The load to be used for inventory and operating rating based on LRFR method shall be AASHTO’s HL-93 loading (truck & lane or tandem & lane), according to BDM Figure 902.All bridges shall also be load rated for four Ohio Legal Loads (2F1, 3F1, 4F1, and 5C1) at operating level using the same method of analysis as used for inventory and operating ratings above. The four Ohio legal loads (2F1, 3F1, 4F1 and 5C1) are given in BDM Figure 903.All trucks used for analysis shall have transverse spacing, between centerline of wheels or wheel groups, of 6 ft. [1.830 m].For long span bridges as defined in BDM Section 905, use the special load configurations given in BDM Section 917.The inventory and operating ratings for the AASHTO HL-93 loading shall be expressed in terms of rating factors, rounded off to the nearest two decimal points. The operating ratings for each of the Ohio Legal Loads shall also be expressed in terms of rating factors of respective legal load rounded off to the nearest two decimal points. The summary rating for all of the Ohio Legal Loads shall be the smallest rating factor of the four vehicles expressed as a percentage (i.e., multiplied by 100) and rounded off to the nearest 5 (125%, 100%, 65%, etc.)BDM: ODOT Bridge Design Manual
Training/Course Title: Bridge Inventory Coding Training Purpose: To train how to code BR87 & BR86 forms in the ODOT BMS using the ODOT Bridge Inventory Coding Guide (BICG); discuss and review new changes in the BICG and Federal Coding requirement; several examples will be discussed.
Bridge Inspection Training Course Announcement:Bridge Inspection Level 1 - Basic (May 17, 18, 19 - ODOT District 9, Chillicothe)Bridge Inspection Level 2 - Advanced (June 14, 15, 16 - ODOT District 9, Chillicothe)Bridge Inspection Level 1 - Basic (September 20, 21, 22 - ODOT District 3, Ashland)Bridge Inspection Level 2 - Advanced (October 11, 12, 13 - ODOT District 3, Ashland)
Training/Course Title: Bridge Inventory Coding Training (First training session is full now and we have added another session).Purpose: To train how to code BR87 & BR86 forms in the ODOT BMS using the ODOT Bridge Inventory Coding Guide (BICG); discuss and review new changes in the BICG and Federal Coding requirement; several examples will be discussed.
Technical AdvisoryThe purpose of this Technical Advisory is to provide recommendations regarding the in-service inspection of, and the treatment of critical findings identified on, fracture critical bridges fabricated from AASHTO M270 Grade 100 (ASTM A514/A517) steel, more commonly known as "T-1" steel.
Additional details intended to provide clarity to the Technical Advisory
Federal Standard 595 Paint Spec InformationThe following is made available to our customers as a reference point only. See below for how to request the 595 specification from the US Government. Contact your paint manufacturer such as Sherwin Williams for paint or additional information.
This course is for bridge designers and engineers to learn how to load rate reinforced concrete frames and arches using AASHTO LFR & LRFR Specifications. Session is closed. Registration is full.
The “Manual for Repair and Retrofit of Fatigue Cracks in Steel Bridges” is now available on FHWA’s website. Development of the Fatigue Repair Manual was initiated by the late Professor Robert Dexter from the University of Minnesota and finalized for publication by FHWA. It represents expert consensus guidelines that were gathered and vetted during a special fatigue workshop held at Lehigh University in 2002, with further revisions and updates made over the last decade. This manual may be download free of charge from attached link.
For further information regarding the SMS transition, logging into the test-site, software & hardware requirements, URL of SMS in production mode and any future announcements, please refer to the following web page:
SELECTION OF SPREAD FOOTINGS ON SOILS TO SUPPORT HIGHWAY BRIDGE STRUCTURES
Implementation Guidance for Using Spread Footings on Soils to Support Highway Bridges
FHWA Memorandum “Implementation Guidance for Using
Spread Footings on Soils to Support Highway Bridges”
FHWA Seismic Bridge
Bridge Maintenance – NHI 130108 Newly Updated Version of Course for 2016
Replacing the original Bridge Maintenance course (FHWA-NHI-134029), this entirely new Instructor-led Training (ILT) course will provide participants with knowledge regarding common deficiencies that occur in bridges, common defects in bridge elements, preventive maintenance techniques, and protective systems intended to prevent deterioration and deficiencies in bridges. With this knowledge, this course will enable participants to investigate proper bridge maintenance procedures using bridge maintenance resources and apply these practices on-the-job.
Safety Inspection of In-Service Bridges (NHI Training) - Columbus, OH
This 10-day course was updated in 2012 and now contains mandatory Prerequisite Requirements for participants and host requirements in preparation for the field exercises. This course is based on the 2012 FHWA "Bridge Inspector's Reference Manual (BIRM)" and provides training on the safety inspection of in-service highway bridges. The course includes a physical field trip which includes an actual bridge inspection. This field trip is in lieu of one or both virtual bridge exercises. ODOT will provide transportation for course participants to attend the field trip portion of this course. Further training will include inspection on critical findings, their identification and response; curriculum on the AASHTO element level inspection approach; and activities that maximize participant engagement throughout the course. The course fulfills the comprehensive bridge inspection training requirements of the National Bridge Inspection Standards.
ODOT's Seismic Policy Update
At 9:00 am on Wednesday December 14, 2016 in the ODOT Central Office Auditorium, 1980 West Broad Street, ODOT will present an update to the Seismic Policy for bridge and structure design. This update will provide an introduction to Seismology; present Ohio's seismic history; discuss AASHTO's seismic design philosophy; explain the reason for the policy update; illustrate the process to determine the seismic hazard for a project location; and discuss the design impact of ODOT's new seismic policy on new and existing structures. Attached is an agenda (4.5 CPD hours available):
ODOT Seismic Policy Update Agenda.pdf
ODOT’s Seismic Policy Update – Additional Information
The ODOT Office of Structural Engineering will be conducting several two day AASHTOWare BrR (version 6.8.2) training sessions for Load Raters. Same training will be given in each session.
The AASHTO LRFD Bridge Design Specifications - 9th Edition is now available from the AASHTO Store.
The AASHTO Committee on Bridges and Structures has been notified of the following error in the LRFD Bridge Design Specifications, Article 5.10.6 that may lead to improper spacing of shrinkage and temperature reinforcement:
The third bullet item in the first list which reads:
"For all other situations, 3.0 times the component thickness but not less than 18.0 in."
Shall be replaced with:
"For all other situations, 3.0 times the component thickness or 18.0 in."
GFRP Latest Developments Webinar
LTAP hosted a webinar on 12/9/2021 with perspectives on GFRP reinforcement provided by owners, manufacturer/suppliers, designers, contractors, and installers.
Bridge Inspection Level 1 and Level 2 Training
These two separate one-week long classes (5-d each) will be taught by Jared Backs and Mike Brokaw three times each year. It has been invite-only in 2021 and 2022 in order to clear the priority compliance backlog from COVID. We are still clearing the backlog. If you are an ODOT Bridge Specialist 1 or an active bridge inspector employed by a County Engineer or a City and have not attended these two classes then email Jared.Backs@dot.ohio.gov. All classes will be offered in Columbus at ODOT Central Office until the waitlist is cleared. Once the wait list is cleared in 2022 or 2023 then registration will be offered through LTAP.
The Federal Highway Administration updated the National Bridge Inspection Standards on June 6, 2022. There will be significant changes rolled out regarding bridge inspection policy, qualifications and data requirements in the coming months and years. For the latest on these updates please refer to the National Bridge Inspection Standards 2022 website. For how Ohio plans on implementing the new rules please stay tuned.
AISC/NSBA Presentation: Achieving Speed in Steel Fabrication
A link to this recent presentation has been provided on our office's Industry Resources web page. This is an informative fabrication perspective that provides insight on the role owners, designers and general contractors can play to speed up fabrication which was presented at the NASCC: The Steel Conference.