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All Bridge Designers Memorandums

All Bridge Designer (ABD) Memorandums are directives from IDOT's Bureau of Bridges and Structures advising bridge designers on bridge design policy changes prior to the policy's incorporation in this office's standards and manuals.

Special Instructions: The current ABD memos are available for download. Users can download individual memos or all memos. To download an individual file to your hard drive click the link with the right mouse button, then choose "save target as." To view the file, click the link with the left mouse button. A Table of Contents (TOC) with links to all the current memos is also available. The TOC is replacing the annual written notification of changes in the status of ABD memos. After downloading, the ABD memo files and the Table of Contents file must be placed in the same directory. Files are in Adobe PDF format.

Current ABD Memos

Memo

Subject

Issued

Status

ADB 22.8Modular Expansion Joint Details and Re-Certification02-Dec-22NEW
ABD 22.7Noise Abatement Walls10-Nov-22Active
ABD 22.6IDOT Seismic Manual- Plan Detail Requirements07-Oct-22Active
ABD 22.5Railing Library Update30-Sept-22Active
ABD 22.4Seismic Manual Announcement2-Sept-22Active
ABD 22.3High Load Multi-Rotational Bearings26-Aug-22Active
ABD 22.2Pipe Liners31-Mar-22Active
ABD 22.1Stub Abutments10-Jan-22Incorporated
ABD 21.5Steel Railing, Type CO-1010-Dec-21Incorporated
ABD 21.4Steel Railing, Type SM and SMX10-Dec-21Incorporated
ABD 21.3Steel Railing, Type IL-OH12-Oct-21Incorporated
ABD 21.2New Precast Prestressed Concrete IL81 & IL90 Sections21-Sept-21Incorporated
ABD 21.1Porous Granular Embankment Requirements for Precast Concrete Box Culverts23-July-21Active
ABD 20.XAASHTO LRFD Specification29-May-20Active
ABD 19.9Revised PPC Beam Details for Elastomeric and Fixed Bearings9-Sep-19Incorporated
ABD 19.8Integral and Semi-Integral Abutment Bridge Policies and Details9-Sep-19Incorporated
ABD 19.7Cleaning and Painting Existing Steel Structures1-Aug-19Active
ABD 19.6Structure Coating Policy for New Steel Superstructures1-Aug-19Incorporated
ABD 19.5Design Guides3-Jun-19Incorporated
ABD 19.4Steel Structure Analysis and Cross-Frame/Diaphragm Policy Updates15-Apr-19Incorporated
ABD 19.3Revised provisions for Precast Prestressed Concrete IL beams and applicable I and Bulb T beams25-Mar-19Incorporated
ABD 19.2Membrane Waterproofing System for Buried Structures5-Mar-19Active
ABD 19.1Constant-Slope Parapet Update11-Jan-19Incorporated
ABD 17.XAASHTO LRFD Specification15-Nov-17Active
ABD 17.1Bridge Deck Smoothness Grinding Policy31-Mar-17Incorporated
ABD 16.1Three Sided Structure Policy Revision22-Dec-16Incorporated
ABD 15.8Slab Bridge Design Revisions2-Dec-15Incorporated
ABD 15.7Increased Limits for Expansion Joints2-Dec-15Incorporated
ABD 15.6New Elastomeric Bearing Sizes2-Dec-15Incorporated
ABD 15.5Revised Load Rating Guidance for Bolted and Riveted Gusset Plates in Steel Truss Bridges6-Oct-15Active
ABD 15.4AASHTO Revisions for Tension Development Lengths11-Jun-15Incorporated
ABD 15.3Superstructure Concrete Compressive Strength; Live Load Distribution and Overhang Limits29-Apr-15Incorporated
ABD 15.2New Precast Prestressed Concrete IL-Beam Sections and Revisions to the I-Beams and Bulb T-Beams3-Mar-15Incorporated
ABD 15.1Aesthetic TL-4 Concrete Bridge Railing29-Jan-15Incorporated
ABD 14.2Revised Scour Design policy7-Nov-14Incorporated
ABD 14.142" F Shape Parapet18-Aug-14Incorporated
ABD 12.5Revised Riprap Treatment Standards and Guidelines10-Dec-12Incorporated
ABD 12.4Slipforming of Parapets Option17-Aug-12Incorporated
ABD 12.32012 Integral Abutment Bridge Policies and Details25-Jul-12Incorporated
ABD 12.2New Bulb T-Beam Details for Improved Deck Removal16-Apr-12Incorporated
ABD 12.1Vehicle Collision Force16-Apr-12Incorporated
ABD 11.3LRFD Design Requirements for Precast and Cast-In-Place Box Culverts23-July-21Revised
AASHTO MBEAASHTO Manual for Bridge Evaluation3-Apr-09Active
ABD 09.1Guidelines for Structural Assessment Reports for Contractor's Means and Methods9-Mar-09Active
ABD 08.4Drainage Manual Modification \ Pipe Culverts & Storm Sewers7-Nov-08Active
Archive AnnouncementMetric Manuals19-Mar-07Active
ABD 06.1Structural Concrete Repair16-Mar-06Active
MemoSubject Issued Status 
TOCTable of Contents15-Jun-13Revised
ABD 13.XAASHTO LRFD 2013 Interims10-Jun-13NEW
ABD 12.5Revised Riprap Treatment Standards and Guidelines10-Dec-12Active
ABD 12.4Slipforming of Parapets Option17-Aug-12Active
ABD 12.32012 Integral Abutment Bridge Policies and Details25-Jul-12Active
ABD 12.2New Bulb T-Beam Details for Improved Deck Removal16-Apr-12Active
ABD 12.1Vehicle Collision Force16-Apr-12Active
ABD 12.0AASHTO LRFD Specifications2-Apr-12Active
ABD 11.3 (rev.)LRFD Design Requirements for Precast and Cast-In-Place Box Culverts11/2/2011
Revised January 27, 2012
Active
ABD 10.2Load Rating Guidance for Bolted and Riveted Gusset Plates in Steel Truss Bridges11-May-10Active
ABD 10.1Bridge Painting Policy27-Apr-10Active
AASHTO MBEAASHTO Manual for Bridge Evaluation3-Apr-09Active
ABD 09.1Guidelines for Structural Assessment Reports for Contractor's Means and Methods9-Mar-09Active
ABD 08.4Drainage Manual Modification \ Pipe Culverts & Storm Sewers7-Nov-08Active
Archive AnnouncementMetric Manuals19-Mar-07Active
ABD 06.1Structural Concrete Repair16-Mar-06Active
MemoSubject Issued Status 
TOCTable of Contents15-Jun-13Revised
ABD 13.XAASHTO LRFD 2013 Interims10-Jun-13NEW
ABD 12.5Revised Riprap Treatment Standards and Guidelines10-Dec-12Active
ABD 12.4Slipforming of Parapets Option17-Aug-12Active
ABD 12.32012 Integral Abutment Bridge Policies and Details25-Jul-12Active
ABD 12.2New Bulb T-Beam Details for Improved Deck Removal16-Apr-12Active
ABD 12.1Vehicle Collision Force16-Apr-12Active
ABD 12.0AASHTO LRFD Specifications2-Apr-12Active
ABD 11.3 (rev.)LRFD Design Requirements for Precast and Cast-In-Place Box Culverts11/2/2011
Revised January 27, 2012
Active
ABD 10.2Load Rating Guidance for Bolted and Riveted Gusset Plates in Steel Truss Bridges11-May-10Active
ABD 10.1Bridge Painting Policy27-Apr-10Active
AASHTO MBEAASHTO Manual for Bridge Evaluation3-Apr-09Active
ABD 09.1Guidelines for Structural Assessment Reports for Contractor's Means and Methods9-Mar-09Active
ABD 08.4Drainage Manual Modification \ Pipe Culverts & Storm Sewers7-Nov-08Active
Archive AnnouncementMetric Manuals19-Mar-07Active
ABD 06.1Structural Concrete Repair16-Mar-06Active