Structure Technical Policies (STPs)

Structure Technical Policies (STPs) are the authoritative requirements in DES has developed to ensure the structures designed or modified meet our expectations for safety, economy, maintainability, and functional life. The terms “must” and “shall” are used for mandatory requirements. 

STPs are organized to closely align with the organization of the AASHTO LFRD BDS.  They are set to design standards and methods of analysis in addition to those specified in the design specification by establishing exceptions and additions to the design specifications, limitations of design specifications, required method or process for using the design specifications, design or analysis criteria for an area not addressed in design specifications.

STPs also mandate the use of a certain bridge or earth retaining system components or features, however, they were developed to be mindful to not stifle innovation.

 STPs are approved by the Deputy Division Chief of Bridge Design (BD) or Structures and Engineering Services (SES). Adoption of STPs is mandatory for all projects for which Type Selection has not taken place. Any deviation from technical policies must be approved by the Deputy Division Chief of BD or SES.

Engineers are responsible for checking this webpage for new or updated STPs prior to Type Selection.  

To request content or files, that are not currently available at this time, please email: Manuals.Products@dot.ca.gov