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Signal Bridge Standard Details (IS-15)

Note: Include this plan sheet as part of the Contract Plans for any WSDOT Contract requiring the installation of a Signal Bridge Standard.


Signal Bridge Design


This plan provides the necessary details to install a Signal Bridge. View Plan Sheet (pdf 85 kb) 

   
Camera and associated hand
hole on signal bridge
Signal bridge

Foundation Design

Per the "Soil Investigation in the Signal Design Process" memorandum, region electrical design groups need to contact the Region Materials Engineer (RME) and request foundation recommendations. The RME will assess the site's soils and topography for the proposed Signal Bridge Standard location. View memorandum (pdf 88 kb). 

The RME may elect to provide the foundation design recommendations directly to the Bridge and Structures Office or request that the HQ Geotechnical Office provide the recommendations. In either case, the Bridge and Structures Office or the Engineer of Record will be responsible for the development of the special foundation design.

In no case should an individual from a region electrical design group select a standard foundation for use without the recommendation and concurrence of the RME.

Per the above memorandum, region electrical design groups are directed to request a soils analysis, in memorandum format, from the RME. Please note the highlights, which represent the specific information to be included for each project, in the provided template. View Soils Analysis Request Memo (pdf 30 kb)

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