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City of Portland

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17.27.230 Design Standards.

A.  Load ratings and structural design shall be in accordance with the most current edition of the Standard Specifications for Highway Bridges published by the American Association of State Highway and Transportation Officials (AASHTO) in effect at the time of permit issuance or such alternative specifications as are adopted by the City Engineer.

B.  Structural driveways shall have a minimum load rating of H‑15 except that in cases where the structural driveway accesses only one single family residential structure from a Local Service Traffic Street as defined by the Transportation Element of the Comprehensive Plan, the City Engineer may allow a structural driveway in conformance with Uniform Building Code standards if, in the opinion of the City Engineer, the circumstances are such that the lower rating will not create a hazard to the public or users of the structural driveway and permanent vehicle barriers are installed to prevent access to the structure by vehicles exceeding eight feet in height.

C.  The City Engineer may require vehicle barriers, railings, and other appurtenances in excess of AASHTO standards and higher load ratings if in the City Engineer’s opinion such appurtenances are necessary to protect the public and users of the structural driveway.