Click for next page ( 30


The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement



Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

Do not use for reproduction, copying, pasting, or reading; exclusively for search engines.

OCR for page 29
30 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!

OCR for page 29
31 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

OCR for page 29
32 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): ______________________ ______________________________________________________________________________________

OCR for page 29
33 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

OCR for page 29
34 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): _____________________________________________________________________

OCR for page 29
35 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!