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For more information please see Product Bulletin PBTSD-1810-3. Previously erroneous values could occur, generally at member ends, where Rigid Zones were not being correctly accommodated.

1 - Curved Concrete Beams - Load Analysis Results - improvements are made to the Load Analysis results for Curved Concrete Beams with Rigid Zones.

For more information please see Product Bulletin PBTSD-1810-2.

1 - Steel Design - US Head Code - Beams - for sections susceptible to LTB, the amplification factor (applied to the stresses sigma_by and sigma_w) may have been evaluated incorrectly in previous versions.

This issue is addressed in this release.

For more information please see Product Bulletin PBTSD-1810-1.

1 - Steel Design - US Head Code - Beams - for HSS sections in Torsion previous versions of TSD only took account of Yielding strength when evaluating torsion with combined forces and therefore may have underestimated the utilisation ratio when Local Buckling was more critical than Yielding.

If you wish to retain this option we therefore recommend using the File > Save As… option to save a new version of the file and retain the original.

Previous Versions and file compatibility - Files from all previous versions can be opened in this release however note that, once saved, they may not open in an older version.

Installation - this service pack requires Tekla Structural Designer 2018i to be installed and will upgrade this to version 18.1.1.27.

Licensing - no new license is required for this version.

Tekla User Assistance Service Pack release notes.

Tekla User Assistance Main version release notes.

If you are upgrading from a version earlier than Tekla Structural Designer 2018i (version 18.1.0.45) you can find details of enhancements and fixes included in all previous releases in Tekla User Assistance (TUA) and Tekla Downloads via the links below: It includes a number of enhancements and issue resolutions as detailed below.

This release will upgrade your Tekla Structural Designer installation to version number 18.1.1.27 and should be installed to ensure optimum function of the program. The installation package has been re-published to fix a few minor issues with the initial release - if you are experiencing any issues please ensure you are running 18.1.1.29 before contacting support.