General performance and stability improvements

This release includes several additional fixes, not explicitly detailed here, that enhance overall performance and stability. An example of this type of fix is given directly below:

• [TSD-19843] - Portal Frame Design: Crash when using “Auto-space” within the Member Stability dialog

  A fix has been implemented for an issue where the Auto-space feature failed for specific two-span monopitch frames, previously requiring manual positioning of restraints.

[TSD-18214] - Enhanced meshing of semi-rigid diaphragms at walls

In response to customer requests, the meshing of semi-rigid diaphragms (SRDs) has been enhanced to provide improved attachment to walls. Previously, SRDs only attached to walls at each end of the wall and at intermediate beam ends if beams were also attached to the wall. For multistory structures, where the focus is on the distribution of load between the lateral force resisting elements, this typically has minimal impact. However, for low-rise structures, where the focus might be more on restraining the wall against out-of-plane movement, the lack of attachment could be more significant.

Consider the following example in which a lateral load has been applied to a wall. The top edge of the wall is attached to a roof panel. The roof is set to act as a semi-rigid diaphragm.

[TSD-19562] - Highlight locations of extreme result values

An Extremes button has been introduced in the Results ribbon for locating max/min values for any of the result types highlighted below.

When any of the above results are displayed, selecting Extremes causes arrows to be placed directly over the maximum and minimum values.

For example, when stress contours are initially displayed in the following 3D view it may not be immediately apparent where the peak values occur.

But by selecting Extremes on the ribbon, arrows draw your attention to the maximum and minimum values; in 3D views, locator lines are also displayed in the plane of each arrow to make them easier to find.

If you hover over an arrow, the extreme value is displayed in a tooltip.

While Extremes is potentially going to be of most use for interrogating 2D contours, it can also be used to locate other results, such as:

max and min support reactions

[TSD-18318] - Masonry wall patches - Text 2D option added to Scene Content

A "Text2D" option has been added to Scene Content for wall patches.

This can be enabled within 3D Structure and 2D Frame Views to support in-model reviews and enhance visualization.

[TSD-5676] - Show Dimensions in Sub Structure view

Dimensions can now be included in sub structures. If a dimension is added in a sub structure view it is automatically considered to be part of the sub structure. Dimensions created in other views can be introduced to a sub structure in the usual way.

[TSD-19348] - Connections not updating when Tekla Connection Designer is not installed

The following problem was introduced in the first release of Tekla Structural Designer 2026. If you tried to update connections but did not have Tekla Connection Designer installed, the process window would show "Updating connections" but the process would not complete. This is now fixed.

[TSD-19640] - Review View - Cantilever ends - apply to composite beams

Previously, when applying cantilever ends in a Review View, while you could do so for non-composite beams, you were prevented from doing so for composite beams.

The workaround was to swap the beam(s) to be non-composite in the Structure View first, before going to the Review View to then apply a cantilever end.

This limitation has now been removed, so that as shown below you can now apply the cantilever end to a composite beam directly in a Review View.

Note that when you return to the Structure View the beam has been automatically swapped to non-composite for you.

[TSD-19641] - Review View - Releases - window select to toggle not working

From Tekla Structural Designer 2025 onward, when editing Releases in a Review View the ability to select by dragging a window in order to toggle releases had stopped working. This is now fixed.

[TSD-19348] - Combination Generator - Add support for Temperature Loading cases

The combination generator now automatically defaults to include temperature load cases if a loadcase of the Temperature type is present. If no loadcase of the Temperature type exists, the generator operates as it did previously. This feature is available for all design codes apart from the Australian AS:1170.0 code.

For further information about the automatically generated combinations for each code version, see: ASCE7 combinations, Eurocode combinations, British Standards combinations, and Indian Standards combinations

Remoting API

The Open API has been updated to version 26.2.0. The main enhancement being the introduction of the ILoadcase.GetGeneratedWindDataAsync method which allows users to access generated wind data for a specific loadcase, including torsional moment summations and average loads on building sides.

For a list of newly added capabilities see the Tekla Structural Designer 2026 Open API Release Notes.

[TSD-19566] - Wall beam adjustment - override on beam by beam basis

In response to user requests we have provided a way to adjust the stiffness of wall beam elements within the meshed wall analysis model. To appreciate what wall beams are, and how you can now change their stiffness refer to Wall beams and wall beam stiffness.

[TSD-19658] - Footfall Analysis - Allow export of all modal results to Excel

A second option for export of modal analysis results data relating to footfall analysis models has been introduced, there are now 2 options:

1. The pre-existing "All Modal Results" option has been re-named "Relevant Modes"

   This exports a complete list of modal frequencies along with mode shape data for all modes up to the cut off frequency.

2. A new option "All modes"

   This exports a complete list of modal frequencies along with mode shape data for all modes.

   The number of modes found is set or influenced by the footfall analysis settings

   This option has been requested to allow independent post processing of the results to assess more specific situations.

[TSD-8003] - US Wind - Report Wind load case total torsion MT values

The torsional moment (M_T) applied to the structure from torsional wind load cases is now summed and reported along with the applied eccentricity (E_X) in the Wind Data report chapter for all cases. Previously, this information was only reported when the panels were configured to decompose to rigid diaphragms.

[TSD-1268] - Export Save Location

A General page has been added to the Report Settings dialog to enable you to specify the location when a report is exported to PDF, Word, Excel, or Tedds.

[TSD-1575] - Drawing Management - Changing the Analysis Type

The Drawing Management dialog has been enhanced to allow you to select the analysis method for those drawing variants that display analysis results, (i.e. Foundation Reactions, Beam End Forces, and Column Splice Loads). Previously these drawings would only be created for first-order linear results.

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. We strongly recommend version 7.0 or later of the license server which can be obtained from Trimble Downloads.

This service pack requires Tekla Structural Designer 2026 first release to be installed and will update your current version.

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.

Tekla Structures - if you wish to integrate with Tekla Structures for optimum performance you should install Tekla Structures 2026 (and the latest Service Pack for this). These can be obtained from Trimble Downloads.

Tekla Tedds - for integrated design using Tekla Tedds you should install Tekla Tedds 2026 (and the latest updates for this). These can be obtained from Trimble Downloads.

Autodesk Revit© - the most recent Tekla Structural Designer Integrator for Autodesk Revit© 2026 was released in March 2026. For more information about this see the Tekla Structural Designer Integrator for Autodesk Revit 2026© SP1 Release Notes. The installation for this is available in Trimble Downloads. If you are now using Autodesk Revit© 2026, you can install this to perform BIM integration with Tekla Structural Designer.