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

TOCTable of Contents22-Dec-16Revised
ABD 16.1Three Sided Structure Policy Revision22-Dec-16NEW
ABD 16.XAASHTO LRFD Specification Interims2-Feb-16Active
ABD 15.8Slab Bridge Design Revisions2-Dec-15Active
ABD 15.7Increased Limits for Expansion Joints2-Dec-15Active
ABD 15.6New Elastomeric Bearing Sizes2-Dec-15Active
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-15Active
ABD 15.3Superstructure Concrete Compressive Strength; Live Load Distribution and Overhang Limits29-Apr-15Active
ABD 15.2New Precast Prestressed Concrete IL-Beam Sections and Revisions to the I-Beams and Bulb T-Beams3-Mar-15Active
ABD 15.XAASHTO LRFD Specification Interims18-Feb-15Active
ABD 15.1Aesthetic TL-4 Concrete Bridge Railing29-Jan-15Active
ABD 14.2Revised Scour Design policy7-Nov-14Active
ABD 14.142" F Shape Parapet18-Aug-14Active
ABD 14.XAASHTO LRFD Specifications22-Aug-14Active
ABD 13.XAASHTO LRFD 2013 Interims10-Jun-13Archived
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 Culverts

11/2/2011

Revised 1/27/12

Active
ABD 10.2Load Rating Guidance for Bolted and Riveted Gusset Plates in Steel Truss Bridges11-May-10Superseded
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
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