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APPENDIX A
Questionnaire
NCHRP Project 20-5
Synthesis Topic 36-01
BRIDGE RATING PRACTICES AND POLICIES
FOR OVERWEIGHT VEHICLES
This synthesis' objective is to document state/province bridge rating systems, practices, and policies as
these relate to overweight and oversize vehicles. This survey is to understand the causal factors for lack of
uniformity in permit issuance among different agencies. We appreciate your responding to the following
questionnaire. It may need to involve personnel of different units in your organization (e.g., your district or
regional offices). For your convenience, you may return multiple copies answered by various units. Please
return the questionnaire by e-mail, fax, or U.S. mail to:
Dr. Gongkang Fu, PE
1647 Greenwich Drive
Troy, MI 48098
(248) 641-3864 (voice and fax); (313) 577-3842 (voice)
gfu@eng.wayne.edu
Please return this questionnaire by January 28, 2005.
Name:
Title:
Organization:
Phone:
e-mail:
Name:
Title:
Organization:
Phone:
e-mail:
In case you are unable to answer some of these questions, you may leave them unanswered, but please
return this questionnaire with the above section filled. Thank you!
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I. Permitting Process and Procedure
I-1. Please identify and explain the classifications of overweight/oversize permits your state/province issues
(e.g., annual permit for up to 115 kips, trip permit, etc.) or provide a copy of your permit practice manual
that includes this information. For each classification of permit, indicate if a review of the structure's
existing load rating is required or if a new load rating is required. Attach more sheets if needed.
Type 1
Type 2
Type 3
Type 4
Type 5
Type 6
Do agencies other than the state/province DOT (e.g., local agencies) issue these permits?
Yes
No.
If "Yes," specify these agencies and which permit classifications they issue: ________________________
______________________________________________________________________________________
I-2. Is your agency considering or adopting new changes in your overweight/oversize permit policies?
Yes
No.
If "Yes," please describe them: _____________________________________________________________
I-3. In your state/province, overweight/oversize permits are processed (check all that apply)
a. by only one single state/province DOT office.
If you checked this box, how many full-time equivalent employees (2,080 h/year) are dedicated to this
function? ________
Do you think this staffing is adequate?
Yes
No.
If bridge load rating is needed for permit checking, which offices perform that?
The same state/province DOT office
Other (specify): ____________________________________________________________________
b. by several state/province DOT offices.
If you checked this box, how many such offices process permits in your jurisdiction? ________
How many full-time equivalent employees (2,080 h/year) are dedicated in these offices to this function?
________
Do you think this staffing is adequate?
Yes
No.
If bridge load rating is needed for permit checking, which offices perform that?
The same state/province DOT offices
A single state/province DOT office
Other (specify): ____________________________________________________________________
c. by several local agency offices.
If you checked this box, how many such offices process permits (involving either state or local roads and
bridges)? ________
How many full-time-equivalent employees (2,080 h/year) are dedicated in these local agency offices to
this function? ________
Do you think this staffing is adequate?
Yes
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No.
If bridge load rating is needed for permit checking, which offices do that?
The same local agency offices
Several state/province DOT offices
A single state/province DOT office
Other (specify): ________
I-4. Which agencies enforce overweight/oversize permit restrictions in your state/province?
DOT
State/province police
Local police
Other (specify): _____________________________________________________________________
I-5. Please give the total number of bridges that are rated in your state/province. ________
They represent ________% (percent) of all the bridges in your state/province.
I-6. What approximate percentage of bridges in your jurisdiction has electronic analytical models that can
regenerate load ratings with minimal additional data input? ________%.
Do you think whether an electronic analytical model is available may have an impact on achieving
uniformity in permitting trucks within and between states/provinces?
Yes
No.
If "Yes," please specify the impact: __
_______________________________________________________
______________________________________________________________________________________
II. Load Rating Procedure for State/Province Bridges
II-1. Which methods do you use in rating state/province bridges for permit review?
AASHTO LRFR
AASHTO ASR
AASHTO LFR. If checked, do you use the compact section provisions?
Yes No.
Do you use the overload article 10.57 of the specification? Yes No
Other (specify): __
_____________________________________________________________________
Please provide the reasons for using these methods/specs in your rating practice: _____________________
______________________________________________________________________________________
II-2. If a permit review requires a bridge load rating to be reviewed or regenerated, who fulfills the task?
(Check all that apply.)
State/province agency personnel
State/province-contracted consultants
Other (specify): ______________________________________________________________________
II-3. Which load rating levels are used in checking overweight/oversize permits in your jurisdiction?
Inventory
Operating
Other (specify): _____________________________________________________________________
Please explain the rationale for using the level indicated: _______________________________________
______________________________________________________________________________________
If two or more boxes were checked, please describe when to use which one(s): ______________________
______________________________________________________________________________________
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II-4. How do you apply vehicle load to consider possible multiple presences of vehicles in permit
checking?
Not considered (i.e., one lane of permit vehicle only)
One lane of permit vehicle plus other adjacent lanes of lighter/legal vehicles
Other (specify): _____________________________________________________________________
II-5. Do you restrict permit vehicles regarding their traveling behaviors?
Position on bridge
Speed
Exclusion of other vehicles on bridge
Acceleration/deceleration while on bridge
Other aspects (specify): _______________________________________________________________
To what classification(s) of permit are these restrictions applicable? (You may use the classification
definitions in your answer to Question I-1.) __________________________________________________
II-6. What computer-aided modeling methodologies and tools do you use in rating for permit checking?
None
Finite-element analysis. Specify software: _________________________________________________
Grillage method. Specify software: ______________________________________________________
Girder line analysis. Specify software: ___________________________________________________
Other (specify method and software): ____________________________________________________
II-7. What software do you use for bridge rating? (Check all that apply.)
None
BRASS - Girder
BARS
Virtis
Other (specify): _____________________________________________________________________
If more than one is checked, please identify the most used software: ______________________________
If you are not using Virtis, do you have a plan to use it?
Yes. If "Yes," by when? ______________________________________________________________
No.
II-8. What methods do you have for screening permit vehicles to minimize or eliminate bridge analysis?
Comparing permit vehicle's and design vehicle's load effects
Using charts and/or curves of acceptable axle spacings and weights
Comparing with analysis results of standard bridges
Other (specify): ______________________________________________________________________
II-9. Do you have specifications/guidelines/policies for considering bridge conditions in rating?
Yes
No.
If "Yes," please give the title of the document (e.g., AASHTO Specifications ....) or provide a copy of the
document if it is state/province-specific: ________________ ______________________________________
II-10.
a. Do you consider axle widths/gages in bridge rating for checking permit trucks?
Yes
No.
If "Yes," please describe how it is handled or provide a document that explains how: _________________
______________________________________________________________________________________
b. Do you consider axle widths/gages in bridge rating for checking permit cranes?
Yes
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No.
If "Yes," please describe how it is handled or provide a document that explains how:
c. Please describe how a superload occupying more than one lane can be checked in bridge rating?
d. Does your agency allow higher weight for trucks with wider axle widths/gages?
Yes
No.
If "Yes," please provide more details or a policy document for this permit type. _____________________
______________________________________________________________________________________
II-11. Do you have specifications/guidelines/policies for determining a bridge's material properties in
bridge rating?
Yes
No.
If "Yes," please give the title of the document (e.g., AASHTO Specifications....) or provide a copy of the
document if it is state/province-specific: _____________________________________________________
______________________________________________________________________________________
II-12. Please describe how curb post and rail dead loads are distributed to the members in bridge rating or
provide the specifications/guidelines/policies regarding this: _____________________________________
______________________________________________________________________________________
II-13. For load rating, which definition(s) do you use for span length?
Bearing center to center
Structural length as defined in NBI
Other (specify): _____________________________________________________________________
II-14. Please describe how you consider bar cutoffs in rating reinforced concrete members. ____________
______________________________________________________________________________________
II-15. How do you determine the dynamic load allowance/impact factor in load rating?
According to the AASHTO Standard Specifications
According to the AASHTO LRFD Specifications
Other (specify): _____________________________________________________________________
II-16. Which limit states do you use in rating for permit vehicle checking?
Moment
Shear
Serviceability
Other (specify): _____________________________________________________________________
II-17. How is the distribution factor determined in rating for permit checking?
Use AASHTO Standard Specifications
Use AASHTO LRFD Specifications
Other (specify): _____________________________________________________________________
II-18. Do you consider these additional loads in checking permits?
Overlay dead loads
Temporary barriers
Other dead and live loads (specify): _____________________________________________________
II-19. Do you consider these effects of environmental factors in checking permits?
Temperature
Humidity (e.g., for P/S concrete members)
Other (specify): _____________________________________________________________________
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III. Load Rating Procedure for Local Bridges
III-1. Are the local bridges in your jurisdiction rated using the same procedures as for state/province
bridges (with respect to all items in Section II above)?
Do not know
Yes
No. If no, please indicate the differences: _________________________________________________
______________________________________________________________________________________
III-2. Who performs rating for local bridges when it is needed in permit checking? (Check all that apply.)
State/province agency personnel
State/province-contracted consultants
Local agency personnel
Local agency-contracted consultants
Other (specify): _____________________________________________________________________
III-3. At which level is the decision on who performs rating made?
State/province
Local government
Other (specify): _____________________________________________________________________
IV. Additional Information
IV-1. If you are aware of any effort spent towards improving uniformity in rating for permitting
overweight/oversize vehicles or any study relevant to this subject, please kindly provide contact
information below. Add more sheets if needed.
Subject:
Name:
Organization:
Phone:
e-mail:
Subject:
Name:
Organization:
Phone:
e-mail:
V. Additional Comments
V-1. If you have any further comments/questions relevant to this questionnaire or this synthesis topic,
please add them here. ____________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
You have completed this survey. Please return by January 28, 2005.
Thank you very much!
