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.
  • Archived Design Memorandums - if there is an old design memorandum that is not listed on the table below and you would like a copy, please contact Alex Kocik.

Active 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)
01-2020 01/06/2020 Revised BDM Section 6.7 Corrosion of Steel Foundations and Buried Structures (pdf 362 kb)
06-2019 08/31/2019 Bridge Mounted Sign Bracket Requirement (pdf 45 kb)

Inactive Design Memorandums

Number Date Subject
12-2019 12/25/2019 Revised BDM Section 8.3 Buried Structures (pdf 360 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