Our Projects
Click on a project for more information and screenshots:

Incident Tracking System

Bridgetech has developed and is maintaining an incident tracking system at: http://www.wydot-brass.com. Users of our software can use this site to report any issues they may find. From there, we promptly receive notice and can efficiently assign who will work with you to resolve the issue.

AASHTO LRFD Bridge Design Electronic Spec

screenshot of AASHTO LRFD Bridge Design Specs This project was a pilot study to determine the feasibility of supporting an electronic version of AASHTO LRFD Bridge Design Specifications. The intent was to modernize the specifications and allow for automated version control. This provides the benefit of being able to easily track changes to the specifications across multiple versions. Other requirements of the project included: the ability to print a hard copy of the same quality as the current specifications, the ability to store user-created margin notes, the ability to link directly to external reports/references, the use of dynamic graphics in SVG format, and automated bookmarks.


screenshot of BT Beam program Principle engineers and programmers. Developed a structural analysis engine that was ultimately implemented for the pier substructure analysis within Opis. Verifying the pier loading and analysis for solid shaft piers. This project involved significant application of the AASHTO LRFD Specifications.


screenshot of BT Beam program Principle engineers and programmers. Developing and maintaining the BRASS export and import modules for superstructures. This project involved significant application of the planning for AASHTO LRFD and LRFR.

BRASS Suite of Programs

Teaming with the Wyoming Department of Transportation (WYDOT), BridgeTech designs, develops, maintains, and supports users for several programs associated with highway transportation structures. These programs are distributed by WYDOT. Click a link for descriptions and screenshots: Contact: Mr. Brenden Schaefer at WYDOT (307-777-4427) or see here for WYDOT’s BRASS suite.

BT Beam

screenshot of BT Beam program BT Beam is a simple-to-use analysis engine for the analysis of simple and continuous girders with the LRFD specification. It reports influence lines and each live load and then computes factor and distributed loads. Finally, load envelopes are reported. Output is ASCII and a delimited table for importing into a spreadsheet. For details and pricing, please contact us. Try it for free here. Key Benefits
  • * Simple to use
  • * Easily paste data into spreadsheet
  • * Reasonably priced

CRSI Slab Bridge Designer

screenshot of BT Beam program An application was developed that aids in the design of reinforced concrete slab bridges according to the AASHTO LRFD method. Based on a minimum amount of user input, the application performs a beam-line analysis in order to determine shear and moment values at all points within the structure. The loads are appropriately factored according to the LRFD method. Influence lines as well as unfactored, factored, and critical values are plotted for both shear and moment. The user is then led through a series of iterative steps for rebar selection and specification checking.

KDOT Sign Support Structure Software

screenshot of BT Beam program An application was developed to aid in the design and specification checking of sign truss structures designed for over-highway use. The application was modeled on the current design practice of the Kansas DOT office. A Three-dimensional structural model is generated and passed to STAAD for structural analysis. The results are used to perform simple specification checking. The entire sign truss (including the signs themselves) can be viewed in 3D using the OpenInventor visualization library.


Principle engineers and programmers. Implemented the AASHTO LRFR Specifications in BRASS-GIRDER(LRFD)™. Used the NCHRP 12-50 process for parametric studies and reporting.

NCHRP 12-50

screenshot of BT Beam program The objective of this project was to develop a methodology for bridge-design software validation. This objective has been achieved with the development of “Process 12-50″, a systematic method of comparing and evaluating bridge design and analysis software. Process 12-50 also provides a standardized report format for presenting and comparing results for a specific bridge design and a powerful method for formally reviewing specification changes.

Michael Baker Jr., Inc., assisted by BridgeTech, Inc., Modjeski and Masters, Inc., and Paul D. Thompson, performed the research.

NCHRP 12-62/12-62 A

screenshot of BT Beam program Simple “S-over” live load distribution factors for shear and moment have been used for bridge design since the 1930s. The traditional factors, which are included in the AASHTO Standard Specifications, are easy to apply, but can be overly conservative and even unconservative in some parameter ranges.

New, more accurate, and more complex, live load distribution factor equations were developed under NCHRP Project 12-26 and were included in the AASHTO LRFD Bridge Design Specifications (LRFD specifications). The “S-over” factors are not included in the LRFD specifications. The new distribution factor equations have limited ranges of applicability. When the ranges of applicability are exceeded the LRFD specifications mandate that refined analysis is required.

Designers find the complexity of the current equations troubling. Simpler live load distribution factor equations would be welcomed by the design community. The objective of this research was to develop new LRFD live load distribution factor design equations for shear and moment that are simpler to apply and have a wider range of applicability than those in the current LRFD specifications and reduce the need for refined analysis.

This research and the companion NCHRP Project 12-62A was performed by BridgeTech, Inc., with contributions from Tennessee Technological University, HDR, Inc., and Dennis Mertz. The report fully documents the research leading to the recommended live load distribution factors.

PCA National Bridge Inventory User Interface

screenshot of BT Beam program A user interface was developed to query and format National Bridge Inventory (NBI) data stored within an Access database. The application is used to obtain information based on many user-specified criteria including material type, construction year, the US state in which the bridge resides, etc. Reports based on the resultant data are automatically generated. These reports include numerical as well as plotted data.