Standard Specification for Structural Supports for Highway Signs, Luminaires, and Traffic Signals

NCHRP Project 17-10: Part I
The proposed Standard Specification for Structural Supports for Highway Signs, Luminaires, and Traffic Signals (Supports Specifications) is the result of an extensive research study performed under NCHRP Project 17-10. The Supports Specifications has been revised in its entirety with significant additions made to its content and scope. The main objective of the work was to update the previous edition of the Supports Specifications based on the most recent state-of-the-art information for the design and use of structural supports. Considerable effort was made to specify the best practice, realizing the characteristics and limitations of each material. From a design safety standpoint, all materials for structural supports were treated on an equitable basis. While safety, aesthetics, and economy were three main guidelines in developing the provisions of the Supports Specifications, manufacturing practices and experiences were also taken into consideration. The document is presented in a specification/commentary side-by-side format that will enable the engineer to review with ease the basis of Supports Specifications’ provisions. References are updated to provide a resource for the most recent research studies related to the structural behavior and performance of structural supports. An extensive table of contents is provided to allow easy reference and quick access to various provisions of the Supports Specifications.

NCHRP Project 17-10: Part II

The totally revised specifications in AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, 2001 contained significant improvements over past editions and was presented in a user-friendly specification / commentary side-by-side format. Despite this major update in the specifications, a number of technical issues still need further study. NCHRP Project 17-10(2) was initiated to address a number of prioritized technical topics. Addressing these topics would result in more comprehensive state-of-the-art supports specifications. Topics covered by Project 17-10(2) include assessing the wind loading provisions of the 2001 specifications, fatigue design for noncantilevered sign structures, foundation selection and anchor bolts, connection plate flatness criteria, bending about the diagonal for steel rectangular or square sections, drag coefficient transition for multi-sided sections, performance specifications for fiberglass-reinforced plastic poles, and a set of detailed design examples illustrating the application of the 2001 specifications. The project also outlines a strategic plan for future enhancements of the specifications and for conversion of the specifications to a load and resistance factor design philosophy and format.


Research Investigators
For more information concerning this research project, click on an investigator(s) name below.

Fouad H. Fouad
Chair and Professor