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OpenBridge Designer

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WS wind speeds table for FDOT Sdg 2.4 (and combinations) are not updated as per 2025

There appears to be a discrepancy in wind load calculations—specifically, the gust factor of 0.85 remains different from AASHTO standards. However, the FDOT Structures Design Guidelines (SDG) 2025 now allow the use of AASHTO Article 3.8, which may...
about 1 month ago in OpenBridge Designer 0 Needs review

LBS to read LL libraries from LBC

The Live Load (LL) library in LBS currently allows importing .cs3 files, which are legacy formats from the stand-alone versions of CONSPAN and CONBOX (see screenshot below). However, in the latest releases of LBC under OpenBridge Designer (OBD), i...
about 1 month ago in OpenBridge Designer 0 Needs review

Exporting entire LBS model (cross-frames, diaphragms and stiffeners) to DGN

In LBS (LEAP Bridge Steel), it appears that cross frames (CF) and stiffeners are not exported to the DGN file. The screenshot below is from LBS Tutorial 2, which highlights this limitation. The goal is to streamline CAD detailing by having LBS gen...
about 1 month ago in Import/Export / OpenBridge Designer 0 Needs review

Update to Manual for Bridge Evaluation 3 rd edition

The current version of LBC we're using references the Manual for Bridge Evaluation, 2nd Edition as the basis for bridge rating. I'm wondering if there are plans to update this to reference the 3rd Edition instead. If such an update is planned, cou...
about 1 month ago in OpenBridge Designer 0 Needs review

Interoperability of concrete diaphragm from OBM to LBC for open/close box beam types

There’s a need for improved interoperability between OBM and LBC when working with concrete diaphragms in open or closed box beam configurations. Specifically, the transfer of diaphragm data—such as start, end, and interior diaphragms—for box gird...
about 1 month ago in OpenBridge Designer 0 Needs review

Allow automatic POI definition from bearing to bearing (for camber and deflections)

For final bridge plans involving a steel bridge, we need to report dead load deflections at either the 10th or 20th points along the span—from bearing to bearing. While the program does calculate these points, it currently measures them from the e...
about 1 month ago in OpenBridge Designer 0 Needs review

RMBridge--Seismic Eigen Analysis with CQC Method for Repeated Sub-Systems

In eigenvalue analysis of repetitive structures—where identical sub-systems exist independently within a single model—the same frequencies and eigenmodes are often assigned repeatedly to each sub-system. This leads to an issue with the CQC (Comple...
about 1 month ago in OpenBridge Designer 0 Needs review

Developing Grasshopper Plugin for RM Bridge

The world famious bridge softwares such as Lusas, Midas Civil, Sofistik, Larsa 4D. All of them have been developed Grasshopper Plugin to increase the bridge modeling capacity. Lusas Grasshopper plugin: https://www.lusas.com/products/external_plugi...
about 1 month ago in Modeling / OpenBridge Designer 0 Needs review

Civil Profile 3d Cut - Add depth of cut like Section Callout tool

Currently, the named boundary civil profile tool only takes a slice through a model. It would be extremely useful to be able to specify a depth (clip volume) to capture more geometry that what is being sliced through
over 2 years ago in Drawing Production / OpenBridge Designer / OpenBridge Modeler 9 Future consideration

Add vertical stiffness support in LEAP Bridge Steel

I was told it's in the backlog, so I put it to vote. Add ability to model flexible vertical support (spring) in LEAP Bridge Steel - it's important for bridges that are supported with piers of a compliant nature. This type of support may quite sign...
about 1 month ago in Modeling / OpenBridge Designer 0 Future consideration