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Oregon Department of Transportation Emergency Response Training Class Gary Bowling, Oregon DOT Bridge Engineering Section.

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Oregon Department of Transportation Emergency Response Training Class Gary Bowling, Oregon DOT Bridge Engineering Section.

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Presentation on theme: "Oregon Department of Transportation Emergency Response Training Class Gary Bowling, Oregon DOT Bridge Engineering Section."— Presentation transcript:

1 Oregon Department of Transportation Emergency Response Training Class Gary Bowling, Oregon DOT Bridge Engineering Section

2 Oregon Department of Transportation Presentation ¤ Purpose ¤ Bridge Components ¤ Preparation for the Inspection ¤ Performing the inspection ¤ Reporting the results

3 Oregon Department of Transportation Purpose ¤ Make some ordered sense of the chaos and provide you with a clear understanding of how you fit into the big picture. ¤ Maximize the use of available personnel. ¤ Minimize duplication of effort.

4 Oregon Department of Transportation Purpose ¤ Minimize Confusing and Conflicting Reports. ¤ Provide an accurate accounting of the condition of the bridges under your jurisdiction. ¤ Bottom line: Insure the safety of the driving public.

5 Oregon Department of Transportation Major Bridge Components

6 Oregon Department of Transportation Major Bridge Components ¤ Deck ¤ Superstructure ¤ Substructure ¤ Foundation ¤ Utilities

7 Oregon Department of Transportation Bridge Components Deck Superstructure Substructure Railing Girders Cap Columns Foundation

8 Oregon Department of Transportation Deck ¤ The deck carries the roadway / sidewalk. ¤ The deck is supported by the superstructure. ¤ Transfers vehicular loads to the superstructure.

9 Oregon Department of Transportation Deck

10 Oregon Department of Transportation Superstructure ¤ Superstructure members transfer traffic loads from the deck to the substructure. ¤ Superstructure members can be exposed to tension, compression, and bending forces.

11 Oregon Department of Transportation Superstructure Superstructure

12 Oregon Department of Transportation Substructure ¤ The substructure transfers loads from the superstructure to the foundation material. ¤ The substructure is generally exposed to axial compressive forces. ¤ Can be supported by spread footings or piling.

13 Oregon Department of Transportation Substructure Substructure

14 Oregon Department of Transportation Foundation Foundation

15 Oregon Department of Transportation Major Bridge Components (Utilities - APWA Color Code) F Electrical F Gas F Communication F Potable Water F Irrigation F Sewer Company & Phone No. Red Yellow Orange Blue Purple Green

16 Oregon Department of Transportation Utilities Sewer Line

17 Oregon Department of Transportation Bridge Nomenclature Describing where the problem is?

18 Oregon Department of Transportation Rules of Orientation and member numbering ¤ Look ahead at increasing milepost or city street addresses. ¤ All bridge items are numbered in consecutive order from the leading end of the bridge and left to right.

19 Oregon Department of Transportation Bridge Nomenclature ¤ Bent - a substructure unit that supports the superstructure of a bridge and is supported by the foundation. ¤ Bents are numbered consecutively in the same direction as increasing highway mileposts, or city street addresses.

20 Oregon Department of Transportation Bent 3 Bent 4

21 Oregon Department of Transportation Bridge Nomenclature ¤ Span - portion of the bridge superstructure that is located between two bents. ¤ Spans are numbered numerically, in consecutive order, in the same direction as increasing highway mileposts, or city street addresses.

22 Oregon Department of Transportation Bridge Nomenclature Increasing Mileposts Span 9 Span 11

23 Oregon Department of Transportation Bridge Nomenclature ¤ Superstructure Members can be timber, steel or concrete. ¤ Superstructure Members are numbered numerically, in consecutive order, from left to right, while looking ahead, on line, at increasing mileposts, or city street addresses.

24 Oregon Department of Transportation Span 3 Girder 1 Span 3 Girder 2 Span 3 Girder 3

25 Oregon Department of Transportation Bridge Nomenclature ¤ Substructure Members can be steel, concrete or timber. ¤ Substructure Members are number numerically, in consecutive order, from left to right, when looking ahead, on line, at increasing mileposts or city streets.

26 Oregon Department of Transportation Bent 3, Column 4 Bent 3, Column 5

27 Oregon Department of Transportation Bridge Nomenclature Bridge Nomenclature ¤ When the structure has Intermediate Spans or Columns that are founded on larger spans. ¤ The columns/spans are numbered consecutively, with the bent/span number along with an alphabetical letter. ¤ Commonly occurs on an arch span.

28 Oregon Department of Transportation Span 5 Span 5A Span 5B Bent 5A Column 4 Bent 5B Column 4

29 Oregon Department of Transportation Bridge Nomenclature Bridge Nomenclature ¤ A Truss is a structure that is made up of individual members that are arranged and connected, in triangular patterns, to create a long span. ¤ A Truss is made up of at least two chords, an upper chord and a lower chord. ¤ Truss Panel Points - are located on the chords where two or more truss members are connected.

30 Oregon Department of Transportation Upper Chord Lower Chord Panel Point L0

31 Oregon Department of Transportation Bridge Nomenclature Bridge Nomenclature ¤ Panel points are numbered consecutively, in the same direction as the designated bent or span, starting with 0, along with an identifier to show whether the panel point is on the upper chord, lower chord, an intermediate point, and whether it is on the left or right truss. ¤ Truss Members are identified by using two panel point designations.

32 Oregon Department of Transportation L5R U6R U8RL9R L12RU13R Increasing Mileposts

33 Bridge Mechanics

34 Oregon Department of Transportation Bridge Mechanics ¤ Load Paths ¤ Bending, Tension, and Compression

35 Oregon Department of Transportation Load Paths

36 Oregon Department of Transportation Bridge Mechanics Compression Tension (Tension) (Compression) Bending

37 Oregon Department of Transportation Deck is in bending Girders are in bending Cap is in bending Columns are in compression

38 Oregon Department of Transportation Bridge Mechanics Visualize a rope hanging from two panel points. Members in Tension will be much thinner in section. Members in compression will be much thicker members.

39 Oregon Department of Transportation Properties of Bridge Materials ¤ Design Criteria - Seismic forces that develop during the vibratory response of a structure to earthquake ground shaking at its foundation are inertia forces whose intensity depends on the product of the mass and acceleration. (Force = Mass of the bridge X Ground Acceleration)

40 Oregon Department of Transportation Properties of Bridge Materials (Timber) ¤ If the structure is provided with proper lateral bracing and all of the components are adequately tied together, timber is one of the more efficient earthquake resistant materials for low-rise structures. ¤ Timber is a very resilient material.

41 Oregon Department of Transportation Properties of Bridge Materials (Reinforced Concrete) ¤ Even though Reinforced Concrete tends to be very massive, it can be used effectively if it is properly reinforced. ¤ The proper amount of steel reinforcement and correct detailing plays a very important role in the seismic response of the structure.

42 Oregon Department of Transportation Typical Reinforced Concrete Girder Primary Steel Reinforcement Rebar Stirrups

43 Oregon Department of Transportation Reinforced Concrete Section

44 Oregon Department of Transportation Typical Pre-stress Concrete Girder Prestressing Strands or Post-tensioning Conduits Prestress Strand Jacking Load + 160,000 psi

45 Oregon Department of Transportation Properties of Bridge Materials (Steel) ¤ Because of its high strength per unit weight, Structural Steel members are usually very slender. Thus buckling becomes a serious problem. ¤ Member Connections can also be a problem for steel structures.

46 Oregon Department of Transportation Typical Structural Steel Sections Web Flange

47 Oregon Department of Transportation Structural Steel Members

48 Oregon Department of Transportation Preparing for the Inspection Preparing for the Inspection

49 Oregon Department of Transportation Employee Safety and Equipment ¤ ODOT is committed to a safe and healthy workplace through prevention, equipment maintenance, education, training and compliance with all state and federal regulations.

50 Oregon Department of Transportation Job Safety Analysis (JSA) ¤ Dissect the job into sequential steps. ¤ Identify the potential hazards of each step. ¤ Specify how each hazard will be mitigated. ¤ Follow the game plan.

51 Oregon Department of Transportation Job Safety Analysis (JSA)

52 Oregon Department of Transportation Job Safety Analysis (JSA)

53 Oregon Department of Transportation Job Safety Analysis (JSA)

54 Oregon Department of Transportation Job Safety Analysis (JSA)

55 Oregon Department of Transportation Performing the Bridge Inspection ¤ Remember: The ground could be shaking and/or changed dramatically. ¤ The terrain could be very unfamiliar. ¤ There will be an urgency to get the assessments completed so the bridge can be cleared or actions can be implemented to get the structure back into service.

56 Oregon Department of Transportation Unstable Ground

57 Oregon Department of Transportation Job Safety Analysis (JSA)

58 Oregon Department of Transportation Job Safety Analysis (JSA)

59 Oregon Department of Transportation Job Safety Analysis (JSA)

60 Oregon Department of Transportation Equipment ¤ Personal Clothing ¤ Personal Supplies ¤ Inspection Equipment ¤ ODOT Identification Cards

61 Oregon Department of Transportation Personal Clothing

62 Oregon Department of Transportation Personal Supplies

63 Oregon Department of Transportation Inspection Equipment

64 Oregon Department of Transportation Identification Card

65 Oregon Department of Transportation Preparing for an Emergency Response

66 Oregon Department of Transportation Emergency Response Preparation Response Threshold. Response Threshold. Define the different inspection levels. Define the different inspection levels. Zero-in on the First Response Level 1 Inspections Zero-in on the First Response Level 1 Inspections

67 Oregon Department of Transportation When Should You Respond? Modified Mercalli Intensity Scale (Earthquake Training Handout, pg 4.) I. Not felt by most people, only instruments detect the earthquake. I. Not felt by most people, only instruments detect the earthquake. II. People lying down might feel the earthquake.

68 Oregon Department of Transportation Determining Response Trigger III. People on upper floors of buildings will feel it, but may not know it is an earthquake. Hanging objects swing. IV. People indoors will probably feel it, but those outside may not. Houses may crack.

69 Oregon Department of Transportation Determining Response Trigger V. Nearly everyone feels it. Sleepers are awakened. Doors swing, pictures move, things tip over. VI. Everyone feels the earthquake. Its hard to walk. Windows and dishes broken. Books fall from shelf.

70 Oregon Department of Transportation Determining Response Trigger VII. Its hard to stand. Plaster, bricks, and tiles fall from buildings. Small land slides. VIII. People will not be able to drive cars. Poorly built buildings may collapse, chimneys may fall.

71 Oregon Department of Transportation Determining Response Trigger IX. Most foundations are damaged. Masonry heavily damaged. Pipes are broken. The ground cracks. X. Most buildings are destroyed. Water is thrown out of rivers and lakes. Large landslides.

72 Oregon Department of Transportation Determine Response Trigger XI. Rails are bent. Bridges and underground pipelines unusable. XII. Most things are leveled. Large objects may be thrown into the air. Large rocks masses displaced.

73 Oregon Department of Transportation Determine Response Trigger Where are you when the shaking starts: Home, Work, Somewhere in between. Where are you when the shaking starts: Home, Work, Somewhere in between. Lines of Communication vs Expectations Lines of Communication vs Expectations Work Assignments: Traffic Control, Highway patrol, Inspecting Bridges, Manning the ICC, Gearing-up for repairs. Work Assignments: Traffic Control, Highway patrol, Inspecting Bridges, Manning the ICC, Gearing-up for repairs.

74 Oregon Department of Transportation Bridge Inspection Levels First Look First Look Level 1 Inspections Level 1 Inspections Level 2 Inspections Level 2 Inspections Level 3 Inspections Level 3 Inspections

75 Oregon Department of Transportation First Look First Look - Information source is from untrained, non-transportation personnel. First Look - Information source is from untrained, non-transportation personnel. Taken at face value - whether a bridge has collapsed or not. Taken at face value - whether a bridge has collapsed or not. Provides the first estimate as to the size of the affected area and level of the response effort thats required. Provides the first estimate as to the size of the affected area and level of the response effort thats required.

76 Oregon Department of Transportation Level 1 Inspection Who determines whether a Level 1 Inspection effort will be deployed? Who determines whether a Level 1 Inspection effort will be deployed? Crew Supervisor? Crew Supervisor? District Manager? District Manager? Region Bridge Inspector? Region Bridge Inspector? Bridge Engineer? Bridge Engineer? Local Agency (Director of Public Works)? Local Agency (Director of Public Works)?

77 Oregon Department of Transportation Level 1 Bridge Inspections Level 1 Inspection - Source of Information is from trained, transportation personnel (You). Level 1 Inspection - Source of Information is from trained, transportation personnel (You). Provides the first reliable information on which decisions can be made: Is the bridge damaged? If so, how badly? Is it useable? Whats needed to get the bridge back into service? Provides the first reliable information on which decisions can be made: Is the bridge damaged? If so, how badly? Is it useable? Whats needed to get the bridge back into service?

78 Oregon Department of Transportation Level 1 Bridge Inspections The guideline used by the personnel performing these inspections is: Would you feel comfortable, driving over the bridge, in a loaded truck. The guideline used by the personnel performing these inspections is: Would you feel comfortable, driving over the bridge, in a loaded truck. Partial bridge closure decisions should only be made by a Licensed Engineer. Partial bridge closure decisions should only be made by a Licensed Engineer.

79 Oregon Department of Transportation Level 1 Bridge Inspections Expectation - A Level 1 inspection will be performed on all bridges in the affected area within the first 24 hours. Expectation - A Level 1 inspection will be performed on all bridges in the affected area within the first 24 hours. Urgency - The sooner the agency determines the condition of the infrastructure, the sooner emergency actions can be implemented. Urgency - The sooner the agency determines the condition of the infrastructure, the sooner emergency actions can be implemented.

80 Oregon Department of Transportation Level 1 Bridge Inspection Expectations If the magnitude of the event is from 4.0 to 5.0 with an epicenter within the State of Oregon, or within 50 miles of the Oregon Coast, or State border – If the magnitude of the event is from 4.0 to 5.0 with an epicenter within the State of Oregon, or within 50 miles of the Oregon Coast, or State border – The district will log observations and information from the police, public, and media. The district will log observations and information from the police, public, and media. Primary task – make sure the notification, communication, and response plans are working. Structural damage – unlikely. Primary task – make sure the notification, communication, and response plans are working. Structural damage – unlikely.

81 Oregon Department of Transportation Level 1 Bridge Inspection Expectations If the magnitude of the event is from 5.0 to 6.0 with an epicenter within the State of Oregon, or within 50 miles of the Oregon Coast, or State border – If the magnitude of the event is from 5.0 to 6.0 with an epicenter within the State of Oregon, or within 50 miles of the Oregon Coast, or State border – Bridge maintenance crews will perform a condition assessment on all structures within 50 miles of the epicenter within the first 24 hours. Bridge maintenance crews will perform a condition assessment on all structures within 50 miles of the epicenter within the first 24 hours.

82 Oregon Department of Transportation Level 1 Bridge Inspection Expectations If the magnitude of the event is from 6.0 to 8.0 with an epicenter within the State of Oregon, or within 100 miles of the Oregon Coast, or State border – If the magnitude of the event is from 6.0 to 8.0 with an epicenter within the State of Oregon, or within 100 miles of the Oregon Coast, or State border – Bridge maintenance crews will perform a condition assessment on all structures within 100 miles of the epicenter within the first 24 hours. Bridge maintenance crews will perform a condition assessment on all structures within 100 miles of the epicenter within the first 24 hours. All damaged structures will receive a follow-up condition assessment by engineering personnel within the first 72 hours. All damaged structures will receive a follow-up condition assessment by engineering personnel within the first 72 hours.

83 Oregon Department of Transportation Level 1 Bridge Inspection Expectations If the magnitude of the event is greater than 8.0 with an epicenter within the State of Oregon, or within 300 miles of the Oregon Coast, or State border – If the magnitude of the event is greater than 8.0 with an epicenter within the State of Oregon, or within 300 miles of the Oregon Coast, or State border – Bridge maintenance crews will perform a condition assessment on all structures within 300 miles of the epicenter. Bridge maintenance crews will perform a condition assessment on all structures within 300 miles of the epicenter. A timeframe can not be established due to the magnitude of the damage and the uncertainty of being able to navigate the terrain. A timeframe can not be established due to the magnitude of the damage and the uncertainty of being able to navigate the terrain.

84 Oregon Department of Transportation Level 1 Bridge Inspections Inspection Priorities: Inspection Priorities: Priority 1: Lifeline Routes Priority 1: Lifeline Routes Priority 2: Lifeline Alternate Routes Priority 2: Lifeline Alternate Routes Priority 3: Interstate Routes Priority 3: Interstate Routes Priority 4: Major Arterial Routes Priority 4: Major Arterial Routes Priority 5: Secondary Highways Priority 5: Secondary Highways

85 Oregon Department of Transportation Level 1 Inspections Definition of a Lifeline Route: Routes that are essential for emergency services during the first 72 hours after an event. Definition of a Lifeline Route: Routes that are essential for emergency services during the first 72 hours after an event. Determine Route Itinerary: Determine Route Itinerary: Inspect bridges as you come to them, or Inspect bridges as you come to them, or Drive to the end of the route and inspect bridges back to place of origin. Drive to the end of the route and inspect bridges back to place of origin. Determine Route Configuration Determine Route Configuration

86 Oregon Department of Transportation Level 2 Inspections Who determines whether a Level 2 Inspection effort will be deployed? Who determines whether a Level 2 Inspection effort will be deployed? Crew Supervisor? Crew Supervisor? District Manager? District Manager? Region Bridge Inspector? Region Bridge Inspector? Bridge Engineer? Bridge Engineer? Local Agency (Director of Public Works)? Local Agency (Director of Public Works)?

87 Oregon Department of Transportation Level 2 Bridge Inspections Level 2 Inspections - are performed by Certified Bridge Inspection Team Leaders or Licensed Engineers. Level 2 Inspections - are performed by Certified Bridge Inspection Team Leaders or Licensed Engineers. Obtain information so that repairs can be designed and a detailed scope of repair work can be identified. Obtain information so that repairs can be designed and a detailed scope of repair work can be identified.

88 Oregon Department of Transportation Level 2 Bridge Inspections Anticipate that these inspectors will be teamed and deployed with district personnel in order to maximize their expertise. Anticipate that these inspectors will be teamed and deployed with district personnel in order to maximize their expertise. District personnel are much more familiar with the affected area and potential detour routes. District personnel are much more familiar with the affected area and potential detour routes. Districts have delegated bridge closure authority. Districts have delegated bridge closure authority.

89 Oregon Department of Transportation Level 2 Bridge Inspections Expectation - A level 2 inspection will be performed on all bridges in the affected area within the first 72 hours. Expectation - A level 2 inspection will be performed on all bridges in the affected area within the first 72 hours.

90 Oregon Department of Transportation Level 3 Bridge Inspections A Level 3 Inspection is an in-depth assessment and a structural analysis of the damaged portions of a structure. A Level 3 Inspection is an in-depth assessment and a structural analysis of the damaged portions of a structure. Purpose is to obtain detailed information for load posting, future design criteria, and/or initiate the first steps for a full restoration project. Purpose is to obtain detailed information for load posting, future design criteria, and/or initiate the first steps for a full restoration project.

91 Oregon Department of Transportation Level 3 Bridge Inspections Expectation - A Level 3 Inspection will only be performed on a structure that has been closed. Expectation - A Level 3 Inspection will only be performed on a structure that has been closed. The level 3 inspection could result in: The level 3 inspection could result in: Opening a bridge with a load posting. Opening a bridge with a load posting. Opening a bridge after temporary shoring. Opening a bridge after temporary shoring. Opening a bridge after repaired. Opening a bridge after repaired.

92 Oregon Department of Transportation Emergency Response Kits (Contents of Notebooks) Specified Route Specified Route Possible Alternate Routes Possible Alternate Routes Map Map Bridge Inventory for both routes Bridge Inventory for both routes Damage Assessment Forms Damage Assessment Forms Bridge Tagging Instructions & Markers Bridge Tagging Instructions & Markers

93 Oregon Department of Transportation Suggested Additional Training Bridge Inspector Training Bridge Inspector Training ODOT Working Alone Guideline ODOT Working Alone Guideline Personal Protective Equipment Personal Protective Equipment Work Zone Traffic Control Work Zone Traffic Control Environmental Health Hazard Awareness Environmental Health Hazard Awareness

94 Oregon Department of Transportation Suggested Additional Training Defensive Driving Defensive Driving First Aid with CPR First Aid with CPR Confined Space Training Confined Space Training Fall Protection / Self Rescue Fall Protection / Self Rescue Lead Exposure Awareness Lead Exposure Awareness Lock-out / Tag-out Lock-out / Tag-out Performing a Job Safety Analysis Performing a Job Safety Analysis

95 Oregon Department of Transportation Performing the Inspection Performing the Inspection

96 Oregon Department of Transportation Performing the Inspection Ü When should you start inspecting bridges? Ü Clearly understand the response trigger expectations.

97 Oregon Department of Transportation Responsibilities of the 1st Responder Ü Safely access the structure. Ü Evaluate the structural condition of a damaged structure. Ü Report your Condition Assessment. Ü Tag the Bridge accordingly. Ü Continue on assigned route.

98 Oregon Department of Transportation Safely Access the Bridge Ü Park Vehicle in a safe location. Ü Walk against traffic. Ü Walk beside bridge footprint, not under the bridge. Ü Use binoculars and flashlights. Climb only when absolutely necessary.

99 Oregon Department of Transportation Condition Assessment Report Form Ü Report Form Header Fill it out ahead of time. Fill it out ahead of time. Ü Condition Assessment: 1- (Closed Bridge, rebuild to open) 1- (Closed Bridge, rebuild to open) 2- (Closed Bridge, shore to open) 2- (Closed Bridge, shore to open) 3- (Bridge is Open) 3- (Bridge is Open)

100 Oregon Department of Transportation What to Look For Ü Condition Assessment Form Sketches Ü Bridge Closure Thresholds

101 Oregon Department of Transportation Vertical Movement of Bridge Vertical Movement > 2 Abutment or Pile Cap Sketch 1

102 Oregon Department of Transportation Vertical Movement

103 Oregon Department of Transportation Horizontal Movement Horizontal Movement > 6 Bridge Rail Sidewalk Deck Joint Bridge Deck Sketch 2

104 Oregon Department of Transportation Horizontal Movement Horizontal Movement > 6

105 Oregon Department of Transportation Concrete Columns Bent Vertical Rebar Broken Column Ties Concrete turned to rubble Sketch 3

106 Oregon Department of Transportation Concrete Columns

107 Oregon Department of Transportation Concrete Columns

108 Oregon Department of Transportation Concrete Columns Adequacy of the Columns Adequacy of the Columns Column Offset Bent Vertical Rebar Broken Column Ties Sketch 4

109 Oregon Department of Transportation Concrete Columns

110 Oregon Department of Transportation Concrete Column

111 Oregon Department of Transportation Concrete Columns Critical Position 0.1 X H or 6 inches Max. H Superstructure Concrete Column Expect to see cracks and spalling outside of the column ties near the top and bottom of the column. Sketch 5

112 Oregon Department of Transportation Concrete Columns

113 Oregon Department of Transportation Concrete Columns

114 Oregon Department of Transportation Concrete Columns

115 Oregon Department of Transportation Concrete Columns

116 Oregon Department of Transportation Steel Columns Buckled Flange Steel Column Flange and web cracked Sketch 6

117 Oregon Department of Transportation

118 Oregon Department of Transportation Timber Cap / Pile Connections Timber Post or Pile Timber Cap Bolts Severe Splitting Diagonal Bracing Sketch 7

119 Oregon Department of Transportation Steel Crossbeams or Caps Buckled Flange Steel Crossbeam Buckled Web & Broken Web Stiffener Buckled Web > 25% Bolts or Rivets in a connection are broken Sketch 8

120 Oregon Department of Transportation Rocker Bearings > 1/3 X H Max Plumb Line Superstructure Deck Rocker H Sketch 9

121 Oregon Department of Transportation Sketch 9 Bearings S Original Beam Seat < 0.5 X S or 4 Min. Remaining Abutment or Pile Cap Movement Sketch 10

122 Oregon Department of Transportation Loss of Bearing

123 Oregon Department of Transportation Loss of Bearing

124 Oregon Department of Transportation Pre-stressed Concrete Superstructure Deck Pre-stressed Concrete Superstructure Abutment or Pile Cap Severe Diagonal Shear Cracks at 1/4 points in concrete girder Sketch 11

125 Oregon Department of Transportation Superstructure Side angle or channel buckled Lattice bars stretched or broken Sketch 12

126 Oregon Department of Transportation Steel Superstructure

127 Oregon Department of Transportation Steel Superstructure

128 Oregon Department of Transportation Steel Superstructure > 25% of Connection Rivets or Bolts are broken

129 Oregon Department of Transportation Superstructure Rebar Concrete Cap or Crossbeam Pile Concrete Girder Deck Stirrups Shear Offset Sheared Concrete Girder Sketch 13

130 Oregon Department of Transportation Concrete Girder

131 Oregon Department of Transportation Superstructure S Sag in Concrete Girder Sag @ center > 1% of span length Sketch 14

132 Oregon Department of Transportation Footings W L Undermined Footing Shear Cracks > 3/8 near column Footing Undermined > 20% of bearing area (L x W) Sketch 15

133 Oregon Department of Transportation Concrete Footings

134 Oregon Department of Transportation Footings Piling Punching thru Footing Concrete Column Concrete Footing on Steel Piling Sketch 16

135 Oregon Department of Transportation Approaches Superstructure Deck Approach Slab / AC Settlement > 3 Abutment or End Bent Asphalt Approach Slab Sketch 17

136 Oregon Department of Transportation Approaches

137 Oregon Department of Transportation Approaches Deck Superstructure Approach Embankment / Slab Abutment / Back wall / End Bent Plumb Line H Ground line or top of footing 0.1 X H or 6 inch Max. Sketch 18

138 Oregon Department of Transportation Approaches

139 Oregon Department of Transportation Utilities

140 Oregon Department of Transportation Miscellaneous Structures

141 Oregon Department of Transportation Using the Condition Assessment Form n Thresholds that warrant closing the bridge. n Communication tool - report all damage information to your ICC. Refer to sketches with measurements. n Damage Documentation - send completed condition assessment form to ODOT Bridge Operations.

142 Oregon Department of Transportation Standard Bridge Tagging Procedure n Color Green - Bridge Open / Safe to use Green - Bridge Open / Safe to use Red - Bridge is Closed / Unsafe Red - Bridge is Closed / Unsafe n Where Visible Vertical Surface, Right Side, Both Ends. Visible Vertical Surface, Right Side, Both Ends. n How - Paint Sticks, Keel, or Bags

143 Oregon Department of Transportation Standard Bridge Tagging Procedure Agency Level of Inspection Initials of the Inspector DateTime

144 Oregon Department of Transportation Standard Bridge Tagging Procedure (Example) ODOT 1 GLB 2/28/01 10:58 AM

145 Oregon Department of Transportation Standard Bridge Tagging Procedure (Example) ODOT 1 GLB 2/28/0110:58 AM ODOT 2/28/01 2 IS 3:15 PM

146 Oregon Department of Transportation Acceptable Methods for Closing a Bridge Flagging Tape Flagging Tape Flag Person Flag Person Vehicle Vehicle Barricades Barricades

147 Oregon Department of Transportation Reporting Your Condition Assessment Reporting Your Condition Assessment Your Name Your Name Bridge Name, Hwy, MP, Bridge No. Bridge Name, Hwy, MP, Bridge No. Where on the bridge is the damage located. Where on the bridge is the damage located. Report the amount of damage - refer to the inspection form sketch, give measurements. Report the amount of damage - refer to the inspection form sketch, give measurements. What actions you have initiated. What actions you have initiated. Turn in your completed inspection forms. Turn in your completed inspection forms.

148 Oregon Department of Transportation For Additional Information Bruce Johnson : State Bridge Engineer : 503-986-3344 Gary Bowling : Bridge Operations Engineer : 503-986-3402 Jeff Swanstrom : Senior Bridge Inspector : 503-986-3337 Bert Hartman : Bridge Program Manager : 503-986-3395


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