• No new license is required for this version.

• Client License Service Version - no update is required for this release.

• License Server Version - this relates only to perpetual licenses and the Server (Sentinel RMS) license method. Provided your license server has been updated to version 4.3.x or later (incorporating Sentinel RMS 10.0 which added support for Windows 11), no update is required for this release.

• This service pack requires Tekla Structural Designer 2024 first release or later to be installed and will update your current version.

• Integration -

  • Tekla Structures - if you wish to integrate with Tekla Structures for optimum performance you should install both this release and Tekla Structures 2024 (and the most recent Service Pack for this) .

  • Tekla Tedds - to use Design using Tekla Tedds with this release, you should install Tekla Tedds 2024 AND ensure you have installed all the latest updates for this. These can be obtained from the Download Service.

  • Tekla Portal Frame and Connection Designer - if you install this release and use Tekla Portal Frame Designer and/or Tekla Connection Designer you should install Tekla Portal Frame Designer 24 and/or Tekla Connection Designer 24 (released in Mar 2024) available from the Download Service.

  • Autodesk Revit© - the most recent Tekla Structural Designer Integrator for Autodesk Revit© 2025 was released in September 2024. For more information about this see the Tekla Structural Designer Integrator for Autodesk Revit 2025© Release Notes. The installation for this is available from the Download Service. If you are now using Autodesk Revit© 2025, you can install this to perform BIM integration with Tekla Structural Designer.

    • Supported Revit Versions - the other currently supported Revit© versions are: Tekla Structural Designer Integrator for Autodesk Revit 2022© SP1, Tekla Structural Designer Integrator for Autodesk Revit 2023© SP2 and Tekla Structural Designer Integrator for Autodesk Revit 2024© SP1. The installation for these are available from the Download Service. If you are performing BIM integration with any of these previous Revit© versions, we recommend you install the latest version of the associated Integrator.

• Previous Versions and file compatibility - files from all previous versions can be opened in this release, however note that, once saved, they cannot then be opened in a previous release. If you wish to retain this option we therefore recommend using the File > Save As… option to save a copy of the file in the previous release and retain the original.

• General performance and stability improvements

  A number of additional fixes which are not detailed explicitly here are also made in this release to improve general performance and stability. An example of this is given directly below:

  • [TSD-17340] - Exception when changing the level of a column with K bracing

    An issue which caused a program exception when the Base level of a column connected mid-height to a K bracing arrangement was changed is fixed in this release.

• [TSD-17268] - Imbalance between the total load on the structure and the Vertical Forces in Nodes

  A 'Total Vertical Forces in Nodes' calculation was introduced to the Loadcase properties pane in 2024 SP3 to enable additional checking for load imbalances. If an imbalance is detected between this and the total reaction a warning is displayed in the Process window. The full text of the warning reads (as shown in the picture below):

  "There is an imbalance between the total load on the structure and the Vertical Forces in Nodes. This could result in incorrect loads being applied for Notional Load, Minimum Lateral Load and Seismic Weight loadcases. This imbalance needs investigation - please send your model to technical support for further examination"

  A slight error in the Total Vertical Forces in Nodes calculation caused the warning to be erroneously displayed for some models when there was no obvious cause for concern. In addition, the new check has helped identify some problematic cases which have also been fixed. Hence the warning should now only be displayed when there is a genuine imbalance requiring further investigation.

  

• [TSD-17286] - Wind Loading Eurocode Roof zones - references

  When defining wind zone panel properties for multibay roofs, the factors to apply should be taken from EN1991-1-4 Fig 7.10.

  In previous releases, in the Wind Direction view each Multibay panel was labelled as "Upwind Bay", "Second Bay" or "Third and More Bay" according to the Bay Position property you set for each panel in the Properties window. The factors would then be determined accordingly. The drawback with this approach is that it didn't allow you to visually confirm the factors being used.

  

  

  To clarify the actual factors being used, this property has been replaced by Bay Cpe Multiplier. This enables you to set the panel factors directly as "Bay Factor = 1.0", "Bay Factor = 0.8" or "Bay Factor = 0.6".

  

  

  A tooltip for Bay Cpe Multiplier provides the reference to be used (EN1991-1-4 Fig 7.10) when choosing the factor to apply.

  

[TSD-17252] - Warning issued when foundation mat not meshed in 3D

The existing validation warning "Foundation mat with ground bearing springs not meshed" that is displayed when a foundation mat with ground bearing springs is not meshed has been updated.

Tekla Structural Designer now checks and warns for any foundation mat that is not meshed, irrespective of whether it has the "Use Ground Bearing Springs" property selected or not.