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LBS add a special distribution factor for deflection (AASHTO Art. 2.5.2.6.2)

Under commentary C2.5.2.6.2: "For straight girder system bridge, this is equivalent to saying that the distribution factor for deflection is equal to the number of lanes divided by the number of beams"
9 days ago in Analytics / OpenBridge Designer 0 Needs review

Include column and shaft controlling service loads (RCPIER/LEAP)

When designing drilled shafts, there is no option to display controlling shear and moment loads (bottom of column). This is needed for the geotechnical engineer on designing th drilled shaft. For column design, it is sometime useful to also show c...
10 days ago in OpenBridge Designer 0 Needs review

Separate Limiting Tension Stress at the Top of Prestressed Concrete Girders Near Interior Supports

Add a separate limiting tension stress for the top of girders near interior supports. AASHTO LRFD permits the use of a limiting tension stress at the top of girders near interior supports for Service III different than the limiting tension stress ...
15 days ago in OpenBridge Designer 0 Needs review

Beam section library needs to be updated.

The Florida I-Beam (FIB) section library in LEAP Concrete has not been updated to reflect the latest standard revisions. In particular, the number of strand slots in the third row from the bottom (@ 7") is shown as 13 in LEAP, while the current st...
15 days ago in OpenBridge Designer 0 Needs review

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