Element Level Bridge Inspection Data and Bridge Preservation€¦ · Element Level Data Collection 21 Element Total QTY CS-1 QTY CS-2 QTY CS-3 QTY CS-4 QTY 12 - RC Deck (SF) 16217

Element Level Bridge Inspection

Data and Bridge Preservation

Derek Soden, P.E.

FHWA Resource Center

1

Overview

• Relevant legislation

• Element data, preservation, and asset

management

• FHWA guidance

• Element level inspection training

• Ongoing work

2

Legislation – Element Level Data

• National Bridge and Tunnel Inventory and

Inspection Standards Statutory citation(s): MAP-21 §1111; 23 USC 144

• Each State and Federal agency – within 2 yrs. of

enactment, report element level data on bridges on

the NHS to the Secretary as each bridge is inspected

• The Secretary – study cost-effectiveness, benefits,

feasibility of collecting for non-NHS bridges

Fact Sheet - http://www.fhwa.dot.gov/map21/bti.cfm

NHS Website - http://www.fhwa.dot.gov/planning/national_highway_system/

3

Legislation – Preservation

• National Highway Performance Program Statutory citation(s): MAP-21 § 1106(d)(2)(A); 23 USC 119

– Funds may be obligated for: Construction, reconstruction, resurfacing, restoration,

rehabilitation, preservation, or operational improvement of

segments of the National Highway System.

4

Legislation – Asset Management

• National Highway Performance Program Statutory citation(s): MAP-21 § 1106(e)(1); 23 USC 119

– State Performance Management: A State shall develop a risk-based asset management plan

for the National Highway System to improve or preserve

the condition of the assets and the performance of the

system.

5

Legislation – Bridge Condition

• National Highway Performance Program Statutory citation(s): MAP-21 § 1106(f)(2)(A); 23 USC 119

– Condition of NHS Bridges:

• No more than 10% of total NHS bridge deck area may

be on structurally deficient bridges for more than 3

years, otherwise

• Funds equal to 50% of FY2009 apportionment shall be

set aside for bridge projects

6

Legislation - Performance Goals &

Measures

• National Goals and Performance

Management Measures Statutory citation(s): MAP-21 § 1203; 23 USC 150

– FHWA shall establish performance measure for

NHS bridge condition

7

Preservation Bridge Management Process

8

Component vs. Element vs. Safety

Inspection Data

9

Element

Detailed condition descriptions

Quantified data for all elements

Safety

All other information needed to insure safety and structural integrity

Sketches, photos, narratives, load rating and,……

Critical finding follow-up procedures

Component

General condition rating

Deck, Super, Sub, Culv

Elements Units Total

Qty

CS 1

Qty

CS 2

Qty

CS 3

Qty

CS 4

Qty

12-RC Deck sq. ft. 8663 8114 543 6 0

16-RC Top Flange sq. ft. 7877 7697 96 84 0

301-Pourable Joint ft. 218 208 10 0 0

303-Assembly Joint ft. 193 177 13 0 3

321-RC Approach Slab sq. ft. 1548 1483 15 50 3

330-Metal Bridge Railing ft. 378 322 53 3 0

515-Steel Protective Coating sq. ft. 2294 2293 0 0 1

107-Steel Beam/Girder ft. 1098 1018 80 0 0

515-Steel Protective Coating sq. ft. 13931 0 13851 0 80

110-RC Open Girder ft. 610 0 604 6 0

521-Concrete Protective Coating sq. ft. 5490 5456 0 0 34

310-Elastomeric Bearings each 24 24 0 0 0

205-RC Columns each 14 0 14 0 0


215-RC Abutment ft. 188 136 52 0 0


234-RC Pier Cap ft. 184 182 2 0 0


Reinforced Concrete - Condition State Definitions

Defect CS 1 - Good CS 2 - Fair CS 3 - Poor CS 4 - Severe

Delamination /

Spall / Patched

Area

(1080)

None. Delaminated. Spall 1 in.

or less deep or 6 in. or

less in diameter. Patched

area that is sound.

Spall greater than 1 in. deep or

greater than 6 in. diameter.

Patched area that is unsound

or showing distress. Does not

warrant structural review.

The condition

warrants a structural

review to determine

the effect on strength

or serviceability of

the element or

bridge; OR a

structural review has

been completed and

the defects impact

strength or

serviceability of the

element or bridge.

Exposed Rebar

(1090)

None. Present without

measurable section loss.

Present with measurable

section loss, but does not


Efflorescence /

Rust Staining

(1120)

None. Surface white without

build-up or leaching

without rust staining.

Heavy build-up with rust

staining.

Cracking

(1130)

Width less than 0.012

in. or spacing greater

than 3.0 ft.

Width 0.012–0.05 in. or

spacing of 1.0–3.0 ft.

Width greater than 0.05 in. or

spacing of less than 1 ft.

Abrasion / Wear

(1190)

No abrasion or

wearing.

Abrasion or wearing has

exposed coarse

aggregate but the

aggregate remains secure

in the concrete.

Coarse aggregate is loose or

has popped out of the concrete

matrix due to abrasion or

wear.

Distortion

(1900)

None. Distortion not requiring

mitigation or mitigated

distortion.

Distortion that requires

mitigation that has not been

addressed but does not


Guidance

• FHWA Federal-aid Policy Guidance Center http://www.fhwa.dot.gov/pgc/

• Search, or browse:

– By Discipline: Structures; then

– By Topic: National Bridge Inspection Program

10

http://www.fhwa.dot.gov/pgc/

April 16, 2012 Memo

• Predates MAP-21

• Expresses FHWA’s intention to begin

collecting element level inspection data

– Justification

– Coordination with Coding Guide effort

– Alignment with AASHTO Guide Manual for

Bridge Element Inspections

11

Elements

• AASHTO Manual for Bridge Element Inspection

– National Bridge Elements (NBEs)

– Bridge Management Elements (BMEs)

– Agency Developed Elements (ADEs)

• NBE or BME sub-elements

– ADE-NBE or ADE-BME

• ADE

– Defects

12

https://bookstore.transportation.org/

Elements

• Each element has a…

– Description

• Classification

• Units of measurement

• Quantity calculation

– Condition state definitions

– Feasible actions

– Element commentary

13

March 12, 2013 Memo

• Initial guidance on MAP-21 requirements

• Sets implementation dates:

– October 1, 2014: Begin collecting element level

data as NHS bridges are inspected

– April 1, 2015: First submittal of NBI data to

include element level data

14

March 12, 2013 Memo

• Sets data submittal format

– eXtensible Markup Language (XML)

– Separate submittal from 432-character NBI file

• Intention to refer to AASHTO Manual for

Bridge Element Inspections

• Implementation flowchart:

15

16

Element Inventory

17

215

205

210

234

304

310

310

304

215

12 331

107

Elevation

Typical Section

Element #: xxx

First step is to inventory

the elements for the

bridge by identifying

elements and their total

quantity.

December 16, 2013 Memo

• Four Attachments:

– Specification for the National

Bridge Inventory Bridge

Elements (SNBIBE)

– XML schema

– Example XML data set

– Frequently Asked Questions

18

Element Level Data Submittal

• Elements to be collected by FHWA

– All NBEs

– Selected BMEs:

• Wearing Surfaces (Element 510)

• Steel Protective Coatings (Element 515)

• Concrete Protective Coatings (Element 521)

• Joints (Elements 300 to 306)

– BMEs to be collected are typical targets of

preservation actions

19


• Data items to be submitted for each element: – NBI State Code (Item 1) and Structure Number (Item 8)

– Element Number (EN)

– Element Parent Number (EPN)

– Total Element Quantity

– Condition State 1 Element Quantity




20

Element Level Data Collection

21

Element Total QTY

CS-1 QTY

CS-2 QTY

CS-3 QTY

CS-4 QTY

12 - RC Deck (SF) 16217 0 16000 217 0

510 - Wearing Surface (SF) 15783 15083 500 0 200

304 - Open Joint (LF) 158 100 58 0 0

331 - RC Bridge Railing (LF) 412 360 40 12 0

107 - Steel Beam/Girder (LF) 2054 1044 1000 10 0

515 - Steel Protective Coating (SF) 15728 0 5628 10000 100

310 - Elastomeric Bearings (EA) 40 30 5 5 0

205 - RC Columns (EA) 8 4 4 0 0

210 - RC Pier Wall (LF) 54 44 5 5 0

215 - RC Abutment (LF) 182 140 30 12 0

234 - RC Pier Cap (LF) 150 105 30 15 0


22

State

Code Str. # EN EPN

Total

Qty

CS 1

Qty

CS 2

Qty

CS 3

Qty

CS 4

Qty

1 14277 12 16217 0 16000 217 0

1 14277 510 12 15783 15083 500 0 200

1 14277 304 158 100 58 0 0

1 14277 331 412 360 40 12 0

1 14277 107 2054 1044 1000 10 0

1 14277 515 107 15728 0 5628 10000 100

1 14277 310 40 30 5 5 0

1 14277 205 8 4 4 0 0

1 14277 210 54 44 5 5 0

1 14277 215 182 140 30 12 0

1 14277 234 150 105 30 15 0

• Example Data Set for One Bridge

Data in XML Format

For one element:

<FHWAElementData>

<State_Code>1</State_Code>

<Structure_Number>14277</Structure_Number>

<Element_Number>12</Element_Number>

<Element_Total_Quantity>16217</Element_Total_Quantity>

<Element_Quantity_CSOne>0</Element_Quantity_CSOne>

<Element_Quantity_CSTwo>16000</Element_Quantity_CSTwo>

<Element_Quantity_CSThree>217</Element_Quantity_CSThree>

<Element_Quantity_CSFour>0</Element_Quantity_CSFour>

</FHWAElementData>

23

December 16, 2013 Memo

• Frequently Asked Questions:

– Collection of Bridge Management Elements

(BMEs)

– Collection of element defect data

– Extended interval inspections

– Collection of element level data on other-than-

routine inspection types

24

Element Level Bridge Inspection Training

• NHI Courses:

– NHI 130055, 130054, 130053, 130101,

130101A

– Currently based on 2011 AASHTO Guide

Manual

25

Element Level Bridge Inspection Training

• FHWA Resource Center training

– Based on 2013 AASHTO Manual

– Available in two versions:

• 1-day (classroom only)

• 2-day (w/field exercise)

26

Resource Center Element Training

27

Training Completed

Training Scheduled

Training Requested

Ongoing Work

• Specifications for the National Bridge

Inventory (SNBI)

– Updates 1995 Coding Guide

– Nearing completion

– SNBIBE will be incorporated

28

QUESTIONS?

29

Documents

Element Level Bridge Inspection Data and Bridge Preservation€¦ · Element Level Data Collection 21 Element Total QTY CS-1 QTY CS-2 QTY CS-3 QTY CS-4 QTY 12 - RC Deck (SF) 16217