National Bridge Inspection Standards (NBIS) 23 CFR 650-C - PowerPoint Presentation

National Bridge Inspection Standards (NBIS) 23 CFR 650-C Nebraska County Highway and City Street Superintendents Workshop Slide 1

For the purpose of Minimum Design Standards for County Roads and Municipal StreetsAll structures (bridges, non-buried structures and culverts) On public roadways with a 4-ft opening or greater along the center of the roadway Are subject to the minimum standards for bridgesWe strongly recommend that you inventory and inspect all agency structures, but Only those that meet the Federal Definition of a Bridge are reportable on the NBISNBCS Minimum Design Standards428 NAC 2 Slide 2

Federal and Nebraska Definition of a Bridge A structure over water, roadway, railway or other depression or obstruction with a track over it to move trafficAn opening measured along the center of the roadway of MORE THAN 20 feet between abutmentsIncludes multiple chambers (pipes) where the distance between openings is less than ½ of the smaller contiguous opening Slide 3US Law – Title 23, Part 650 Bridges, Structures, and Hydraulics Subpart C National Bridge Inspection Standards (NBIS) Nebraska Rule and Regulation 428 NAC 2-001.03A5a (page 44)

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http://www.youtube.com/watch?feature=player_embedded&v=uwa4y5dRBro NBIS Overview Short video from FHWA Federal Aid Essentials Website 5 https://www.fhwa.dot.gov/federal-aidessentials/catmod.cfm?id=87

Federal-aid Essentials for Local Public Agencies https://www.fhwa.dot.gov/federal-aidessentials/indexofvideos.cfmCivil RightsProject Development Project Construction and Contract AdministrationFEDERAL-AID PROGRAM OVERVIEWNational Bridge Inspection StandardsFinanceRight-of-Way (ROW)Environment Slide 6

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Companion Guide to Videos Slide 8

9 Tab 11-1 Handout

Bridge Deck DeteriorationWhat causes it?Moisture, moisture, moisture! Concrete DecksSalt attacks rebar through cracksCracks provide principal path for deicing saltsReacts with steel and cement in the concrete May extend through the deck and accelerate corrosion of supporting membersSlide 10

Bridge Deck Deterioration Slide 11

Bridge Deck DeteriorationTimber Decks Less subject to deicing salt damageAggregate and dirt holds moistureCauses rot, cracking and splitting of timber members Slide 12

National Bridge Inspection Standards CFR › Title 23 › Chapter I › Subchapter G › Part 650 › Subpart C650.301   Purpose650.303   Applicability 650.305   Definitions650.307   Bridge inspection organization650.309   Qualifications of personnel650.311   Inspection frequency650.313   Inspection procedures650.315   Inventory650.317   Reference manuals Slide 13

Inspection Organization Each State Transportation Department (NDOR)Must inspect, or Cause to be inspected, All highway bridges located on public roads that are fully or partially located within the State's boundaries Except for bridges that are owned by Federal agenciesSlide 14

Inspection OrganizationEach State Transportation Department or Federal Agency must include a bridge inspection organization that is responsible for the following: Bridge inspection policies and proceduresQuality assurance and quality control, andPreparation and maintenance of a bridge inventory Bridge inspections, reports, load ratings and other requirements of these standardsSlide 15

Qualifications of Personnel Program ManagerIn charge of a unit that performs bridge inspection, reporting and inventoryTeam LeaderIn charge of the bridge inspection team Slide 16

Qualifications of Personnel Program Manager Qualifications Registered professional engineer10 years bridge inspection experienceANDSuccessfully completed FHWA approved comprehensive training course (2 week course) Slide 17

Qualifications of Personnel Team Leader Qualifications Same as Program Manager, OR Five years bridge inspection experience AND successfully completed FHWA approved comprehensive training course, ORCertification as a NICET Level III or IV Bridge Safety Inspector AND successfully completed FHWA approved comprehensive training courseOR Slide 18

Qualifications of Personnel Have ALL of the following:Bachelors Degree in engineering from an Accreditation Board for Engineering and Technology (ABET) accredited university or college and successfully pass the Fundamentals of Engineering Exam Two years bridge inspection experience, ANDSuccessfully completed FHWA approved comprehensive training course, OR Slide 19

Qualifications of Personnel Have ALL of the following:Associates Degree in engineering or engineering technology for ABET accredited college or university Four years of bridge inspection experience, ANDSuccessfully completed FHWA approved comprehensive training courseSlide 20

Inspection Frequency and Procedures Regular intervals not to exceed 24 monthsInspect certain bridges more often than every 24 monthsEstablish interval based on bridge deficiencies and characteristicsFracture Critical Bridges may have members that require more frequent inspection Slide 21

Inspection Frequency and Procedures Inspect each bridge in accordance with the inspection procedures in the AASHTO ManualProvide at least one team leader at the bridge at all times during each initial, routine, in-depth, fracture critical member and underwater inspection.Rate each bridge as to its safe load-carrying capacity Prepare bridge filesMaintain reports on the results of bridge inspectionsTogether with notations of any action taken to address the findings of such inspectionsSlide 22

Inspection Frequency and Procedures Maintain relevant maintenance and inspection data to allow assessment of current bridge conditionRecord the findings and results of bridge inspectionsOn standard State or Federal agency formsIdentify bridges  With fracture critical membersBridges requiring underwater inspection, and Bridges that are scour criticalNDOR requires that participants generating data and supporting reports submit them to NDOR as soon as QC has been completed, but within 90 days Slide 23

Load Rating Each bridge in Bridge Inventory must have a current bridge load ratingCompleted by a Nebraska Licensed Engineer Bridge owners and their Load Rating EngineersResponsible for determining when a bridge must be re-ratedLoad Ratings Reports for new or reconstructed bridgesMust be submitted to NDOR prior to opening the bridge to trafficNDOR is in the process of re-load rating all bridges in the inventory for Special Haul Vehicles (trucks with more than 3 axles) in the next 10 years Slide 24

Load RatingLoad Rating Evaluation determines load carrying capacity Load Carrying Capacity is compared to Nebraska Legal Load thresholds Nebraska Legal LoadsType 3 = 25 tonsType 3S2 = 37 tons Type 3-3 = 43 tonsBridge Inspection Program Manual, Chapter 5 http://www.roads.nebraska.gov/media/3424/ndor-bip-manual.pdf Slide 25

Load Rating Bridges must be load posted If Load Carrying Capacity is less than Nebraska Legal Load thresholdsBridges must be closed If the Load Carrying Capacity is less than 3 ton Bridge Owner must install permanent closure barricadesImmediately upon notification of the need to closeBridge Owner must provide documentation of closure to NDOR Within 3 days of barricade installation Slide 26

27 Tab 11-1 Handout http://www.fhwa.dot.gov/legsregs/directives/fapg/cfr0650c.htm

Bridge Inspection Tips Go in Two’sWear personal protective equipmentOSHA approved harness Take photosFollow the plan of actionSlide 28

Questions? National Bridge Inspection Standards (NBIS) 23 CFR 650-C Slide 29