SUBJECT: STD Plan Retaining Wall
The attached STD Plan Retaining walls are for immediate use in WSDOT contracts. These plans replace the Standard Plans D1-a through D1-f of WSDOT publication M21-01 “Standard Plans for Road, Bridge, and Municipal Construction”. This memorandum does not apply to the ongoing awarded contracts.
Beginning January 2008, WSDOT requires all new bridges, bridge widenings, and walls to be designed in accordance with the requirements of the AASHTO Guide Specifications for LRFD Seismic Bridge Design. WSDOT has recently upgraded the Standard Plan Retaining walls to the new AASHTO LRFD seismic design requirement of 1000 year return period earthquake. These plans need FHWA approval for official publication but this may not be done until August 2008. This memorandum is to implement immediate use of the revised wall plans, consistent with the new seismic design policy requirement, while waiting for FHWA’s approval and official WSDOT publication in the Standard Plans.
If you have any questions regarding this memorandum, please contact Bijan Khaleghi at 705-7181.
cc: Mohammad Sheikhizadeh, Bridge Construction - 47354
F. Posner, Bridge and Structures – 47340
Click on the links below to view a PDF of the following STD Plan Retaining Walls.
STD Plan Retaining Walls
Standard Plan D-10.10-00
Reinforced Concrete Retaining Wall Type 1 and 1SW
Standard Plan D-10.15-00
Reinforced Concrete Retaining Wall Type 2 and 2SW
Standard Plan D-10.20-00
Reinforced Concrete Retaining Wall Type 3 and 3SW
Standard Plan D-10.25-00
Reinforced Concrete Retaining Wall Type 4 and 4SW
Standard Plan D-10.30-00
Reinforced Concrete Retaining Wall Type 5
Standard Plan D-10.35-00
Reinforced Concrete Retaining Wall Type 6
Standard Plan D-10.40-00
Reinforced Concrete Retaining Wall Type 7
Standard Plan D-10.45-00
Reinforced Concrete Retaining Wall Type 8