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High Mast Luminaire Schedule (IS-16)

Note: Include this detail as part of the Contract Plans for any WSDOT Contract requiring the installation of a High Mast Luminaire.

Designers: Reference Standard Plan J-30.10 - High Mast Luminaire Maintenance Pad in the contract plans.

The design of a project lighting system using High Mast Luminaires requires a collaborative effort to determine; where to place the luminaires, the site specific conditions, and the structural analysis needed to provide an adequate foundation for the luminaires. The designer will capture the project design criteria in the schedule for use on the project and for ease of use by future designers.

This Luminaire Schedule is to be included in the development of any Contract Plan that requires the installation of a High Mast Luminaire. View Plan Sheet (pdf 17 kb)

IS-16         IS-16 on a slope
    High Mast Luminaire
       Maintenance Pad 
on slopes level to 10H : 1V 
                  High Mast Luminaire
         Maintenance Pad 
 on slopes steeper than 10H : 1V

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 High Mast Luminaire 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 51 kb)

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