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Final bridge design software

Disclaimer: This software and other files are intended for use by consultants working for the Office of Bridges and Structures in their development of projects for the Iowa Department of Transportation. Any other use is at the sole discretion of the user. The Iowa Department of Transportation makes the software and other files available "AS IS" and assumes no liability nor makes any warranty of any kind, including warranties of non-infringement, fitness or merchantability whether expressed or implied, to the accuracy or functionality of these files. By downloading any files, you are agreeing to this disclaimer.

The Office of Bridges and Structures will only support those persons using these files in connection with Iowa Department of Transportation related business.

LRFD CIP Reinforced Concrete Box Culvert Program

Software written under Iowa Highway Research Board Project TR-620, Update of RCB Culvert Standards to LRFD Specifications.

Installation instructionsPDF Icon

CulvertCalc Installation Files (47 MB)  05/31/12

CulvertCalc Technical Manual PDF Icon (976 KB)

CulvertCalc User Manual PDF Icon (830 KB)

LRFD Steel Girder Design MathcadŽ Sheets 

Attention Internet Explorer users: In order to download Mathcad files, right click on the link and choose "Save target as." If the file extension is shown as XML, be sure to change it to XMCD.

These Mathcad sheets may be used for various portions of AASHTO LRFD steel I-girder design.

Bearing Stiffener (252 KB)

Field Splice (2.7 MB)

Intermediate Stiffener Size (211 KB)

Negative Resistance (1.2 MB)

Plastic Moment-Negative (168 KB)

Plastic Moment-Positive (363 KB)

Positive Moment Constructibility (1.3 MB)

Positive Resistance (1.1 MB)

Shear Connectors (392 KB)

Shear Resistance-End Panel (180 KB)

Shear Resistance-Interior Panel (249 KB)


LRFD T-Pier Example using RC-PierŽ

These files consist of RC-Pier example input files and documentation on the use of RC-Pier for a typical LRFD T-Pier design.

RC Pier Column (4.8 MB)

RC Pier Footing (8.5 MB)

Jefferson Example DocumentationPDF Icon (13.9 MB)


LRFD Frame Pier Example using RC-PierŽ

These files consist of RC-Pier library files, RC-Pier example input files, and documentation on the use of RC-Pier for a typical LRFD frame pier design.

HP Pile Sections (1 KB)

LRFD Loads (14 KB)

RC Pier Column (19.5 MB)

RC Pier Footing (36.0 MB)

Wapello Example DocumentationPDF Icon (8.3 MB)

Wapello Example Documentation AppendicesPDF Icon (5.6 MB)


Iowa DOT Elevation Applications

These spreadsheets allow the user to determine top of slab elevations (CCS, CWPG, PPCB), beam line haunch elevations (CWPG, PPCB) and haunches (PPCB) for straight, constant width bridges.

Elevations for PPCB Excel icon (277 KB) 08/22/13

Elevations for CCS Excel icon (82 KB) 11/06/14

Elevations for CWPG Excel icon (122 KB) 11/06/14

Quick Elevations for PG Excel icon (25 KB)


Iowa DOT Substructure Applications

Some of these spreadsheets allow the user to determine typical pier loads based on the AASHTO LRFD code for use with the RC-Pier software. Some spreadsheets may be used in the LRFD design of typical pier caps, pile footings, and steel laminated elastomeric bearings.

LRFD Pile Length - IDOT ENR Formula SpreadsheetExcel icon (160 KB) 03/04/13

LRFD Pile Length  - WEAP SpreadsheetExcel icon (167 KB) 07/08/13

Pier live load Excel icon (229 KB) 03/12/14

Pier BR CE Excel icon (82 KB) 03/12/14

Pier WA IC Excel icon (51 KB)

Pier WS WL Excel icon (97 KB) 03/12/14

Pier WS WL All Angles Excel icon (144 KB) 03/12/14

Pier and Abut DL Super Reactions Excel icon (225 KB)  04/30/13

Pier Temperature Forces Excel icon (431 KB) 06/07/13

Pile Footing Stiffness Coefficients Excel icon (47 KB)

LRFD Cap Design  Excel icon (133 KB)   06/23/14

LRFD Footing Design Excel icon (44 KB)  02/17/11

Elastomeric Bearing Design Excel icon (64 KB) 04/03/13


Iowa DOT Miscellaneous Programs

This Visual Basic® application provides rebar development and splice lengths for tension bars per AASHTO LRFD code.

Rebar lengths (65 KB) 06/10/13

The bridge deck drain spreadsheet may be used to assist the designer in locating deck drains. The Bridge Design Manual shall be consulted for deck drain policy requirements.

Deck drains (242 KB) 10/22/13

The prepare cost estimate spreadsheet may be used to assist the designer in estimating the cost of a project based on bid items.

Prepare Cost Estimate (692 KB) 11/06/14


In order to use most of the spreadsheets, enable macros according to the following link:
http://office.microsoft.com/en-us/excel-help/change-macro-security-settings-in-excel-HP010096919.aspx

The programs are based on Visual Basic® , Mathcad, and Microsoft® Office Excel® 2007.
Please contact Michael.Nop@dot.iowa.gov with questions on these programs.