These drawings were developed and are supported by the Headquarters Design Office; however, they are provided “as is”. The user assumes full responsibility for the plan’s adequacy to address a specific construction situation and for any alterations to the drawing by the user.


Conduit Sleeve Detail (IS-9)

Signal Standard Foundation Details (IS-13)

Slip Base Adaptor for 4-Bolt Light Standard Base (IS-14)




Contact for this page:
Bill Berens

Design Standards questions:
designstandards@wsdot.wa.gov