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.

Download All Bridge Design Memorandums

Current ABD Memos

Memo	Subject	Issued	Status
ADB 22.8	Modular Expansion Joint Details and Re-Certification	02-Dec-22	NEW
ABD 22.7	Noise Abatement Walls	10-Nov-22	Active
ABD 22.6	IDOT Seismic Manual- Plan Detail Requirements	07-Oct-22	Active
ABD 22.5	Railing Library Update	30-Sept-22	Active
ABD 22.4	Seismic Manual Announcement	2-Sept-22	Active
ABD 22.3	High Load Multi-Rotational Bearings	26-Aug-22	Active
ABD 22.2	Pipe Liners	31-Mar-22	Active
ABD 22.1	Stub Abutments	10-Jan-22	Incorporated
ABD 21.5	Steel Railing, Type CO-10	10-Dec-21	Incorporated
ABD 21.4	Steel Railing, Type SM and SMX	10-Dec-21	Incorporated
ABD 21.3	Steel Railing, Type IL-OH	12-Oct-21	Incorporated
ABD 21.2	New Precast Prestressed Concrete IL81 & IL90 Sections	21-Sept-21	Incorporated
ABD 21.1	Porous Granular Embankment Requirements for Precast Concrete Box Culverts	23-July-21	Active
ABD 20.X	AASHTO LRFD Specification	29-May-20	Active
ABD 19.9	Revised PPC Beam Details for Elastomeric and Fixed Bearings	9-Sep-19	Incorporated
ABD 19.8	Integral and Semi-Integral Abutment Bridge Policies and Details	9-Sep-19	Incorporated
ABD 19.7	Cleaning and Painting Existing Steel Structures	1-Aug-19	Active
ABD 19.6	Structure Coating Policy for New Steel Superstructures	1-Aug-19	Incorporated
ABD 19.5	Design Guides	3-Jun-19	Incorporated
ABD 19.4	Steel Structure Analysis and Cross-Frame/Diaphragm Policy Updates	15-Apr-19	Incorporated
ABD 19.3	Revised provisions for Precast Prestressed Concrete IL beams and applicable I and Bulb T beams	25-Mar-19	Incorporated
ABD 19.2	Membrane Waterproofing System for Buried Structures	5-Mar-19	Active
ABD 19.1	Constant-Slope Parapet Update	11-Jan-19	Incorporated
ABD 17.X	AASHTO LRFD Specification	15-Nov-17	Active
ABD 17.1	Bridge Deck Smoothness Grinding Policy	31-Mar-17	Incorporated
ABD 16.1	Three Sided Structure Policy Revision	22-Dec-16	Incorporated
ABD 15.8	Slab Bridge Design Revisions	2-Dec-15	Incorporated
ABD 15.7	Increased Limits for Expansion Joints	2-Dec-15	Incorporated
ABD 15.6	New Elastomeric Bearing Sizes	2-Dec-15	Incorporated
ABD 15.5	Revised Load Rating Guidance for Bolted and Riveted Gusset Plates in Steel Truss Bridges	6-Oct-15	Active
ABD 15.4	AASHTO Revisions for Tension Development Lengths	11-Jun-15	Incorporated
ABD 15.3	Superstructure Concrete Compressive Strength; Live Load Distribution and Overhang Limits	29-Apr-15	Incorporated
ABD 15.2	New Precast Prestressed Concrete IL-Beam Sections and Revisions to the I-Beams and Bulb T-Beams	3-Mar-15	Incorporated
ABD 15.1	Aesthetic TL-4 Concrete Bridge Railing	29-Jan-15	Incorporated
ABD 14.2	Revised Scour Design policy	7-Nov-14	Incorporated
ABD 14.1	42" F Shape Parapet	18-Aug-14	Incorporated
ABD 12.5	Revised Riprap Treatment Standards and Guidelines	10-Dec-12	Incorporated
ABD 12.4	Slipforming of Parapets Option	17-Aug-12	Incorporated
ABD 12.3	2012 Integral Abutment Bridge Policies and Details	25-Jul-12	Incorporated
ABD 12.2	New Bulb T-Beam Details for Improved Deck Removal	16-Apr-12	Incorporated
ABD 12.1	Vehicle Collision Force	16-Apr-12	Incorporated
ABD 11.3	LRFD Design Requirements for Precast and Cast-In-Place Box Culverts	23-July-21	Revised
AASHTO MBE	AASHTO Manual for Bridge Evaluation	3-Apr-09	Active
ABD 09.1	Guidelines for Structural Assessment Reports for Contractor's Means and Methods	9-Mar-09	Active
ABD 08.4	Drainage Manual Modification \ Pipe Culverts & Storm Sewers	7-Nov-08	Active
Archive Announcement	Metric Manuals	19-Mar-07	Active
ABD 06.1	Structural Concrete Repair	16-Mar-06	Active

Memo	Subject	Issued	Status
TOC	Table of Contents	15-Jun-13	Revised
ABD 13.X	AASHTO LRFD 2013 Interims	10-Jun-13	NEW
ABD 12.5	Revised Riprap Treatment Standards and Guidelines	10-Dec-12	Active
ABD 12.4	Slipforming of Parapets Option	17-Aug-12	Active
ABD 12.3	2012 Integral Abutment Bridge Policies and Details	25-Jul-12	Active
ABD 12.2	New Bulb T-Beam Details for Improved Deck Removal	16-Apr-12	Active
ABD 12.1	Vehicle Collision Force	16-Apr-12	Active
ABD 12.0	AASHTO LRFD Specifications	2-Apr-12	Active
ABD 11.3 (rev.)	LRFD Design Requirements for Precast and Cast-In-Place Box Culverts	11/2/2011 Revised January 27, 2012	Active
ABD 10.2	Load Rating Guidance for Bolted and Riveted Gusset Plates in Steel Truss Bridges	11-May-10	Active
ABD 10.1	Bridge Painting Policy	27-Apr-10	Active
AASHTO MBE	AASHTO Manual for Bridge Evaluation	3-Apr-09	Active
ABD 09.1	Guidelines for Structural Assessment Reports for Contractor's Means and Methods	9-Mar-09	Active
ABD 08.4	Drainage Manual Modification \ Pipe Culverts & Storm Sewers	7-Nov-08	Active
Archive Announcement	Metric Manuals	19-Mar-07	Active
ABD 06.1	Structural Concrete Repair	16-Mar-06	Active

Memo	Subject	Issued	Status
TOC	Table of Contents	15-Jun-13	Revised
ABD 13.X	AASHTO LRFD 2013 Interims	10-Jun-13	NEW
ABD 12.5	Revised Riprap Treatment Standards and Guidelines	10-Dec-12	Active
ABD 12.4	Slipforming of Parapets Option	17-Aug-12	Active
ABD 12.3	2012 Integral Abutment Bridge Policies and Details	25-Jul-12	Active
ABD 12.2	New Bulb T-Beam Details for Improved Deck Removal	16-Apr-12	Active
ABD 12.1	Vehicle Collision Force	16-Apr-12	Active
ABD 12.0	AASHTO LRFD Specifications	2-Apr-12	Active
ABD 11.3 (rev.)	LRFD Design Requirements for Precast and Cast-In-Place Box Culverts	11/2/2011 Revised January 27, 2012	Active
ABD 10.2	Load Rating Guidance for Bolted and Riveted Gusset Plates in Steel Truss Bridges	11-May-10	Active
ABD 10.1	Bridge Painting Policy	27-Apr-10	Active
AASHTO MBE	AASHTO Manual for Bridge Evaluation	3-Apr-09	Active
ABD 09.1	Guidelines for Structural Assessment Reports for Contractor's Means and Methods	9-Mar-09	Active
ABD 08.4	Drainage Manual Modification \ Pipe Culverts & Storm Sewers	7-Nov-08	Active
Archive Announcement	Metric Manuals	19-Mar-07	Active
ABD 06.1	Structural Concrete Repair	16-Mar-06	Active

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All Bridge Designers Memorandums

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