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NCHRP 17-10(2) [Completed]
Structural Supports for Highway Signs, Luminaires, and Traffic Signals
| Project Data |
| Funds: |
$369,992 |
| Research Agency: |
University of Alabama at Birmingham |
| Principal Investigator: |
Fouad H. Fouad |
| Effective Date: |
3/10/1999 |
| Completion Date: |
5/31/2002 |
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NCHRP Report 494, Structural Supports for Highway Signs, Luminaires and Traffic Signals contains the findings of a study to develop recommended revisions to the AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals. The report describes the research effort and provides recommendations for updating and refining the specifications. A strategic plan for further enhancement of the specifications and for conversion of the specifications to load and resistance factor format is also included. The material in this report will be of immediate interest to specification writers, structural engineers, and designers.
The AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals, 4th Edition, is based primarily on recommended provisions developed in NCHRP Project 17-10. In spite of the extensive research efforts performed under NCHRP Project 17-10, a number of technical issues still needed further investigation or refinement. In particular, information was needed on the consequences of changes in the wind speed map, fatigue in noncantilevered structures, foundation selection criteria, drag coefficients for multisided tapered poles, connection plate flatness criteria, strength of rectangular poles bent about the diagonal, and performance specifications for fiber-reinforced composite structural elements. A strategic plan for future enhancement of the specifications, including conversion to load and resistance factor design format, also was needed.
Under NCHRP Project 17-10(2), researchers at the University of Alabama at Birmingham addressed these topics. This report summarizes the findings and recommendations for each of the topics listed above, which can be used to develop comprehensive support specifications. The enhancements outlined in the strategic plan may be undertaken as time and resources permit. Full details of the research findings and recommendations for each topic are available as a series of unpublished appendixes (PDF).
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