Design memorandum
Design memorandum are issued as interim updates to the Bridge Design Manual. Active design memorandums supersede the Bridge Design Manual contents and are currently enforced.
- There are currently no design memorandums related to this topic
Related manual chapters
Chapter 7 - Substructure Design (PDF 2.4MB) provides guidance for substructure design including:
- Foundation modeling for seismic loads
- Columns
- Abutments
- Wing and curtain walls
- Footings
- Shafts
- Piling
- Concrete filled steel tubes
Chapter 5 - Concrete Structures (PDF 18MB) is a secondary resource for substructure design providing guidance for cast-in-place reinforced concrete bridge elements.
Bridge Design Manual
Complete Bridge design guidance is found in the Bridge Design Manual (M 23-50).
See all manuals and standards
Disclaimer
The Washington State Department of Transportation (WSDOT) makes these documents available on an "as is" basis. All warranties and representations of any kind with regard to said documents are disclaimed, including the implied warranties of merchantability and fitness for a particular use. The WSDOT does not warrant the documents against deficiencies of any kind. All CAD files were created using MicroGDS files (*.man). The AutoCAD files (*.DWG) were converted as a service to our customers that use Bentley MicroStation and AutoCAD.
However, no attempt has been made to ensure that there were no errors in the conversion process. Receiver agrees that WSDOT cannot be held responsible for problems arising from files which have been converted. Since revisions or additions to the design file drawings may occur at any time, the Receiver agrees to indemnify, defend and hold harmless WSDOT, its officers, agents, and employees from and against any and all claims, suits, losses, damages or costs, including reasonable attorney's fees, arising from the use of outdated design file drawings, and such indemnification shall survive acceptance of said file(s) by receiver.
Special fonts are required for these drawings. Details are provided in the download and installation instructions.
Bridge design drawings
7.3-A1-1 Column Silo Cover Details (PDF 74KB) (DWG 68KB)
7.8.2-1 Typical Shaft Details (PDF 139KB) (DWG 210KB)