Bridge Design Manual memorandums

We are continuously improving the way we do business. From time to time design memorandums are issued as interim updates to the Bridge Design Manual.

  • Active Design Memorandums supersedes the contents of the Bridge Design Manual.
  • Inactive Design Memorandums have been incorporated into the latest revision of the Bridge Design Manual. They are provided to document and clarify the evolution of the Bridge Design Manual.

Active Design Memorandums

Number Date Subject
12-2020 12/10/2020 Removal of bridge guidance from WSDOT website (pdf 350 kb)
10-2020 10/07/2020 BDM Section 11.1.2 Bridge Standard Drawings (pdf 74 kb)
01-2020 01/06/2020 Revised BDM Section 6.7 Corrosion of Steel Foundations and Buried Structures (pdf 362 kb)

Inactive Design Memorandums

Number Date Subject
07-2020 07/17/2020 Supplement to BDM Section 5.1.1-E – Creep of Concrete (pdf 176 kb)
06-2020 06/04/2020 BDM Section 5.2.4A - calculating deflection and camber in concrete members (pdf 158 kb)
03-2020-2 03/16/2020 BDM Section 15.8.3 - Buried Structures (pdf 154 kb)
03-2020 03/05/2020 BDM Section 8.3 - Buried Structures (pdf 401 kb)
12-2019 12/25/2019 Revised BDM Section 8.3 Buried Structures (pdf 360 kb)
06-2019 08/31/2019 Bridge Mounted Sign Bracket Requirement (pdf 45 kb)
05-2019 02/15/2019 Compressive Stress Limits for Temporary Stresses (pdf 258 kb)
04-2019 03/08/2019 Spliced Girder Bridges (pdf 122 kb)
03-2019 02/25/2019 Seismic Design Requirements for Bridge Retrofit, Modifications and Widening (pdf 70 kb)
02-2019 01/25/2019 Requirements for Intermediate Diaphragms (pdf 181 kb)
01-2019 09/04/2018 Use of isolation Bearings for WSDOT Bridges (pdf 97 kb)
01-2018 2/02/2018 Positive Moment Strand Extension (pdf, 287kb)
10-2017 12/30/2017 Bridge Paving Projects (pdf, 50kb)
09-2017 11/27/2017 AASHTO LRFD Bridge Design Specifications, 8th Edition 2017 (pdf, 168kb)
08-2017 9/30/2017 Scour Requirements for Bridges, Walls and Culverts (pdf, 168kb)
07-2017 9/22/2017 Bridge Design Minimum Requirements (pdf, 43kb)
06-2017 9/12/2017 Bridge deck protection system and future overlay requirements (pdf, 169kb)
05-2017 7/22/2017 New WSDOT Wide Flange Deck Bulb Tee Girders with UHPC Connections (pdf, 73kb)
04-2017 4/21/2017 BDM Updates to Chapters 8 and 15- Culverts (pdf, 29kb)
03-2017 4/13/2017 Handling and Shipping of Prestressed Concrete Girders (pdf, 341kb)
02-2017 2/20/2017 BDM Chapters 8 and 15 Modifications – Culverts (pdf, 48kb)
01-2017 1/08/2017 AASHTO Guide Specifications for LRFD Seismic Bridge Design Amendments (pdf, 92kb)
06-2016 11/26/2016 Foundation Design Parameters in the Contract Plan General Notes (pdf, 160kb)
05-2016 10/03/2016 Hinge Diaphragms At Interior Piers (pdf, 188kb)
04-2016 09/23/2016 Concrete Class 5000P in Bridge Foundations (pdf, 188kb)
03-2016 06/10/2016 Seismic Design Requirements for Bridge Modifications and Widening (pdf, 28kb)
02-2016 04/13/2016 Seismic Isolation Bearings Requirements (pdf, 28kb)
08-2015 12/23/2015 Service III Live Load Factor for Prestressed Concrete Superstructure Elements (pdf, 55kb)
07-2015 11/30/2015 WSDOT Precast Concrete Culvert Series Shapes (pdf, 266kb)
06-2015 11/09/2015 Electronic Plan Sharing Policy (pdf, 214kb)
05-2015 10/30/2015 WSDOT Standard Plan Reinforced Concrete Retaining Wall (pdf, 85kb)
04-2015 09/11/2015 Seismic Isolation Bearings Submittals and Review Process (pdf, 35kb)
03-2015 08/21/2015 Design Standard for Pedestrian Railing Geometry (pdf, 32kb)
02-2015 07/31/2015 Buried Structures (pdf, 89kb)
01-2015 05/30/2015 Buried Structures (pdf, 96kb)
12-2014 12/18/2014 New WSDOT Standard Pretensioned Wide Flange Deck Bulb Tee Girders (pdf, 420kb)
11-2014 12/08/2014 Bridge Traffic Barrier Design Requirements for Fall Protection (pdf, 72kb)
10-2014 11/04/2014 Archiving Design and Check Calculations, Design Files, and S&E Files (pdf, 175kb)
09-2014 09/03/2014 Buried Structures (pdf, 96kb)
08-2014 08/30/2014 Bridge Traffic Barrier Design Requirements for Fall Protection (pdf, 72kb)
07-2014 07/25/2014 Design Requirements for Temporary Bridges (pdf, 52kb)
06-2014 06/30/2014 Buried Structures (pdf, 94kb)
05-2014 05/06/2014 Bridge Anchor Types (pdf, 51kb)
04-2014 04/09/2014 Bridge Anchor Types (pdf, 51kb)
03-2014 04/09/2014 Column Reinforcement
02-2014 03/26/2014 Deep Foundation Program
01-2014 02/19/2014 STD Plans Noise Barrier Wall Type 14 (pdf, 541kb)
     
09-2013 11/14/2013 Elastic Design In Lieu of Overstrength Forces for Capacity Protection (pdf, 33kb)
08-2013 10/17/2013 Self-Consolidating Concrete for Bridges and Structures (pdf, 78kb)
07-2013 09/22/2013 Requirements for Partially Filled Steel Piles and Shafts (pdf, 136kb)
06-2013 08/07/2013 Intermediate Diaphragms for Prestressed Concrete Girder Bridges (pdf, 36kb)
05-2013 07/01/2013 Bridges With MSE Wall Supported Abutments (pdf, 192kb)
03-2013 03/01/2013 Abutment Participation as Part of Earthquake Resisting System (pdf, 179kb)
02-2013 02/08/2013 Placement of Post-tensioning Tendon and Anchorage Placement (pdf, 46kb)
01-2013 01/17/2013 Lateral Confinement for Oversized Shafts for SDCs C and D (pdf, 90kb)
     
14-2012 12/07/2012 STD Plans Noise Barrier Wall Type 11 (pdf, 93kb)
13-2012 10/07/2012 Structural Design Recommendations of CFT and RCFT for Bridge Foundation (pdf, 409kb)
12-2012 09/19/2012 Slab Shrinkage (pdf, 20kb)
11-2012 09/14/2012 Disk Bearings (pdf, 22kb)
10-2012 08/15/2012 Extension of Column Reinforcing Into Crossbeams (pdf, 310kb)
09-2012 07/31/2012 Seismic Design of Underground Structures (pdf, 104kb)
08-2012 07/04/2012 Extended Strands Continuity Design Criteria (pdf, 101kb)
02-2012 02/06/2012 Guide Specifications for LRFD Seismic Bridge Design,
2nd Edition 2011
(pdf, 248kb)
     
08-2011 12/09/2011 Moment Slab (pdf, 93kb)
05-2011 10/07/2011 SEW Bridge Abutment Configuration (pdf, 192kb)
04-2011 09/07/2011 WSDOT Policy For Use Of Seismic Isolation Bearings (pdf, 33kb)
02-2011 07/20/2011 New LRFD Chapter 15 - Design Of Sound Barriers (pdf, 163kb)
01-2011 04/19/2011 Fatigue Design Categories For Pole Structures (pdf, 74kb)
     
08-2010 12/15/2010  Minimum Flexural Reinforcement 
07-2010 06/28/2010 Bearing Resistance of Shaft Groups 
06-2010 06/25/2010  Bridge Traffic Barrier 
05-2010 06/01/2010  Unit Weight of Concrete 
04-2010 05/20/2010 Bridge Load Rating Policy 
03-2010 04/14/2010 Bridge Load Rating Policy 
02-2010 02/16/2010  LRFD Guide Specifications for Pedestrian Bridges 
01-2010 01/08/2010 Wall Type Design Specifications and Stamping Policy (pdf, 48kb)
     
15-2009 02/10/2009 Use of SCC in Structural Applications
14-2009 10/28/2009 Prestressed Girder Dimensions and Allowable Concrete Compressive Stress
13-2009 10/06/2009 Design of Steel Reinforced Elastomeric Bearings
12-2009 08/20/2009 Confinement Reinforcement for Columns and Shafts
11-2009 07/17/2009 LRFD Guide Specs For Pedestrian Bridges
10-2009 07/15/2009 Skin Reinforcement Requirement
09-2009 07/07/2009 Interface Shear Transfer - Shear Friction Design
08-2009 06/23/2009 Reduced Column Base Fixity
07-2009 05/06/2009 Electronic Plan Sharing Policy
06-2009 04/22/2009 Curved Precast Girders
05-2009 04/16/2009 Computer Generated Design Calculations
04-2009 04/10/2009 AASHTO Guide Specifications for LRFD Seismic Bridge Design Amendments
03-2009 03/18/2009 Deep Foundation Program Options
02-2009 03/14/2009 Minimum Depth Limitations on Precast Slab Members
01-2009 02/10/2009 Skin Reinforcement Requirement
     
17-2008 12/15/2008 Load Rating Requirement for Complex Bridges
16-2008 12/12/2008  Approach Slab Details 
15-2008 11/14/2008  AASHTO Guide Specifications for LRFD Seismic Bridge Design Amendments
14-2008 10/16/2008  Prestressed Girder Dimensions and Span Capability 
13-2008 10/02/2008  Bridge Mounted Signs 
12-2008 09/12/2008  Deep Foundation Program Options and Design Force Demand 
11-2008 09/05/2008  Maximum Superstructure Length
10-2008 08/04/2008  Wall Type Design and Stamping/Signing Responsibilities for Special Design Retaining Walls
09-2008 07/28/2008  Full Depth Intermediate Diaphragms
08-2008 07/18/2008 Column-Shaft Connection Design and Detailing Recommendation 
07-2008 06/18/2008  DFSAP Program Limitation
06-2008 06/04/2008  Bridge and Structures Office Contract Plan Seal and Signature Policy 
05-2008 05/16/2008 Computer Generated Design Calculations
04-2008 05/16/2008 Positive Moment Connection at Intermediate Piers 
03-2008 02/18/2008 Implementation of LRFD Guidelines for Seismic Bridge Design 
02-2008 02/08/2008  STD Plan Retaining Wall 
01-2008 01/29/2008 Steel Truss Bridge Gusset Plates
     
17-2007 12/31/2007 Implementation of LRFD Guidelines for Seismic Bridge Design
16-2007 12/06/2007 LRFD General Notes - Pile Foundation
15-2007 11/29/2007  Pipeline Encasement
14-2007 11/02/2007  Pile Types
13-2007 10/03/2007 New Limits for Long Span Prestressed Girders 
12-2007 09/13/2007  LRFD Shear Design 
11-2007 08/28/2007 Web bursting Reinforcement for Curved Post-Tensioned Bridges 
10-2007 07/10/2007 Damaged Prestressed Girder Replacement Protocol 
09-2007 05/24/2007  Load Factor for Live Load in Extreme Event I 
08-2007 05/18/2007  Bridge Deck Overlay
07-2007 05/16/2007  Soldier Pile and Lagging Design Requirements
06-2007 04/30/2007  AASHTO LRFD 4th Edition 2007 
05-2007 04/16/2007  Noise Barrier Wall on Bridges and Retaining Walls
04-2007 03/04/2007  Revisions to Prestress Losses 
03-2007 02/28/2007  Stamping/Signing Responsibilities for Special Design Retaining Walls 
02-2007 01/23/2007  Bridge Design Office Guidelines on QC/QA 
01-2007 01/18/2007 Simplified Wind Load
     
11-2006 12/23/2006 Splitting Resistance of Pretensioned Anchorage Zones 
10-2006 11/28/2006  Elastomeric Bearing for Prestressed Girders
09-2006 10/08/2006  Flexural Resistance Factor 
08-2006 09/26/2006  ASTM A 706 Reinforcement Requirement 
07-2006 08/26/2006  Restriction on CIP Reinforced Concrete Box Girder Superstructures 
06-2006 08/20/2006  Design Guidance for Non-Redundant Steel Box Girder Bridges 
05-2006 08/12/2006 A-Dimension Revisions
04-2006 07/26/2006 Spliced-Girder Closures
03-2006 07/06/2006 Electronic Plan Sharing Policy
02-2006 04/20/2006 CDF for Soldier Pile Tieback Walls
01-2006 02/27/2006 Concrete Deck Slab Reinforcement
     
05-2005 09/06/2005 LL Distribution Factor for CIP Box Girders
04-2005 09/06/2005 Use of Deck Members for Bridges
03-2005 04/06/2005 Steel Reinforced Elastomeric Bearing Design
02-2005 03/07/2005 Mylar Modification Policy
01-2005 03/01/2005 Prestressed Girder Dimensions
     
04-2004 08/16/2004  Cost Estimate Review Procedures
03-2004 07/22/2004 Shaft Design and Detailing Recommendations / Pile Detailing
02-2004 04/01/2004 Spiral Lap Splice Deleted
01-2004 03/18/2004 Release of Temporary Strands In Prestressed Girders
     
03-2003 11/20/2003 LRFD Deck Overhang Design Parameters
02-2003 10/28/2003 Column and Shaft Spirals Options
01-2003 08/21/2003 Detailing Procedure for Retaining Walls
     
13-2002 10/24/2002 BDM Section 9.2-4 Location of Confinement Zones, Extension of Reinforcing Into Crossbeams, Footings and Shafts 
12-2002 09/30/2002  Concrete Deck Slab Details 
11-2002 09/25/2002  Segment Limits For Steel Girders
10-2002 09/18/2002  Field Splice Tolerances 
09-2002 09/17/2002  LRFD General Notes - Pile Foundation 
08-2002 08/16/2002  Bridge Bearing Replacement Provisions 
07-2002 07/23/2002  S-I-P Precast Concrete Deck Panel 
06-2002 07/17/2002 Calculation of Shipping Losses in Prestressed Girders
05-2002 06/24/2002  Bridge Approach Slab Layout 
04-2002 04/02/2002  CIP Fascia Panels on Soldier Piles
03-2002 03/19/2002  LRFD Shear Design 
02-2002 02/26/2002  Hydraulic Jack Design Requirements 
01-2002 02/25/2002 LRFD Seismic Design
     
16-2001 12/04/2001 LRFD Wingwall Design
15-2001 12/04/2001 Long Span Prestressed Girders
14-2001 11/09/2001 Bridge Approach Slabs
13-2001 10/23/2001 Hydraulic Jack Design Requirements
12-2001 09/18/2001 Prestressed Concrete and Steel I Girder Bridge Widening
11-2001 09/10/2001 LRFD Seismic Design
10-2001 08/17/2001 LRFD Deck Overhang Design
09-2001 07/12/2001 Anchor Bolt Specifications
08-2001 06/18/2001 Pretensioned Anchorage Zones
07-2001 06/18/2001 Shear Design
06-2001 06/11/2001 Steel Reinforced Elastomeric Bearings Method A Design Procedure
05-2001 06/04/2001 Bridge Drain Types 7 and 8
04-2001 05/24/2001 Abutment Backfill Load Case
03-2001 05/14/2001 Design Policy Memo - C-I-P Load Distribution
02-2001 04/24/2001 Prestressed Girder Stops - (Construction Plan Details)
01-2001 04/13/2001 Prestressed Girder Stops
     
10-2000 01/10/2000 Reinforced Elastomeric Bearing Pad Shims
07-2000 11/01/2000 BDM, Section 8.3.2-1 Bridge Traffic Barriers
06-2000 07/13/2000 Modification of Bridge and Structures Office Policy Shoring Design for Structures Adjacent to Railroads
05-2000 07/13/2000 AASHTO LRFD Article 5.8.3.5, Longitudinal Reinforcement Requirement
04-2000 04/30/2000 Archiving Design Calculations, Design Files, and S&E Files
03-2000 04/18/2000 Unit Weight of Reinforced Concrete
02-2000 04/17/2000 Approval to use of 11"x17" Paper Plan Sheets
01-2000 04/05/2000 Modification of Bridge and Structures Office Contract Plan Signature Policy