Tekla Structural Designer 2016 Service Pack 2

Last updated November 20, 2017 by Tekla Structural Designer Development Team tekla-product-development-tsd-team-ug@trimble.com

Tekla Structural Designer 2016 Service Pack 2

This service pack should be installed to ensure optimum function of the program. Several improvements and issues have been resolved including:

Issues with Associated Bulletins

  • Chasedown Analysis - Sub Models - in certain circumstances, some FE Concrete walls were not assigned the correct vertical base supports in chasedown analysis sub models. This could result in solver warnings regarding mechanisms for affected sub models and errors in the Loading Summary checks where loads did not tally. Where this issue occurred results for FE chasedown forces were generally incorrect. See Product Bulletin PBTSD-1607-01 (12344, 12279, 12276, 12270, 12268, 12394, 51029).
  • Punching Shear - Headcode EC EN 1992-1-1:2004 - where both transfer moment and shear existed, and the shear value was negative, a value of magnification factor β < 1.0 could be calculated. Since β should always be > 1.0 this produced an unconservative result for the check. This would most commonly be an issue for a column supported by a transfer slab and set to be fully fixed such that a transfer moment occurred. See Product Bulletin PBTSD-1607-02 (12401).

General & Modelling

  • Enhancements to performance and stability particularly related to tolerances.
  • Solver Model - in some circumstances an incorrect rigid offset was created for steel braces connected to concrete columns (12119).
  • Steel Beams - flange restraint condition - where multiple floors were set to be identical (Construction levels > source ), changes to the flange restraint condition for a beam on one level were not correctly reflected in the corresponding beam in the duplicate level (12248).
  • Model opening - program exception - for the rare occurrence of a concrete beam span being fully inside a column section, an error occurred during the model opening process (12304)
  • Settings and Scene - when the colour of an object was changed in Home > Settings > Scene > Colours, the change of colour was not reflected in an open view unless the right-click menu “Redraw” option was selected, or the view was closed and re-opened (12421).


  • Load Decomposition - rarely, an area load applied to a one-way slab was double-counted in the “Total load on structure” value given in the Loading Summary. This was apparent as it produced a warning in the load summary check that the user applied load and load on structure did not tally. This occurred for the following set of circumstances; a roof panel overlapped slab panels, the roof panel “include in diaphragm” option was activated and the Analyse All or Design process was run (12387).
  • Wind Loading - decomposed wind loads arising from the Wind Wizard could be duplicated where inclined planes were duplicated, leading to a double load being applied. Duplication of inclined planes was a rare occurrence and hence so was this issue (12001).


  • Validation process - a program error occurred during validation when a vertical slab panel or slab panels with invalid geometry existed (12177).
  • Concrete Walls - validation has now been added to warn for overlapped concrete walls (12053).
  • Panel Point Loads - in some circumstances an erroneous Validation message was issued for slab point loads warning that they had not been applied as they lay outside the panel area. The loads were being applied but not being flagged as such, hence the erroneous warning (12261).

Analysis & Results

  • Analyse All (Static) - Semi-rigid diaphragms - where the “include in diaphragm” option was activated, large out-of-plane deflections of the roof panel semi-rigid FE mesh elements could occur for the slab self-weight load due to incorrect application of load to the FE mesh (12388).
  • Base Reactions - FE Chasedown - for lateral combinations, the base reaction was different to the axial load in the column directly above the support - the latter being the correct value. This was caused by an incorrect procedure being applied in the calculation of base reactions for chasedown analyses which omitted the effects of lateral load cases included in the combination (12386).
  • Chasedown analyses - in some circumstances chasedown analyses could fail to complete during the Analyse All or Design processes (12361, 12379).



  • Steel Beam Design - Head Codes US, BS, EC, AS, IS - in some circumstances, typically where design was governed by total deflection, auto-design was not picking lightest section (12340, 12347, 12393).
  • Concrete Walls - Seismic Design - when the concrete wall property “in a seismic force resisting system” was set to on (the default) a warning was issued always in design results stating “No seismic combinations found”, although the engineer might not need to consider seismic effects. This warning is now only issued where the engineer has created seismic load cases using the Seismic Loading Wizard (12422).
  • Steel Beam Design - Head Codes US, BS - where a slight amount of contraflexure existed at the end of a beam the correct LTB check was not undertaken. This could also occur rarely for simply supported beams due to a tolerance issue for the value of end moment (12170).

Head Code Australia

  • Steel Design - Steel Design to AS4100 is now enabled without requiring an additional license PAK.

Head Code BS

  • Steel Design - Westok sections - the design process failed to complete for beams in which a cell was exactly in the middle of a span causing a failure in determining the design moment (12458).
  • Concrete Beam Design - in certain circumstances, auto-design could produce inconsistent results for link spacing by selecting a link spacing that subsequently failed the maximum spacing check on one beam, while selecting a sufficient spacing on a similar beam (12230).

Head Code EC

  • Web Openings - in some circumstances the web post buckling check was not performed and displayed incorrect fail status.

Head Code India

  • Steel and Concrete Design - design is now enabled without requiring an additional license PAK.

Head Code US

  • Steel Design - AISC 360 ASE, 2010 - Combined forces out of plane instability check - in cases where the axial compression utilisation ratio was > 1 and high, the combined ratio check would produce a negative number. This has been corrected by limiting the ratio used in the interaction formula to be <= 1.0 (51106).
  • Composite beams - AISC 360 LRFD, 2010 - in some circumstances auto-design did not pick the lightest section from the order list (11762, 12092, 12393).
  • Composite beams - when the “allow non-composite design” setting is on, and in the circumstance that no sections in the section order list would pass as either composite or non-composite, the final design details displayed a composite check. This could be misinterpreted as indicating that non-composite design had not been attempted. The final design in this circumstance will now display a non-composite check making the situation more clear (12355).

Reports & Drawings

  • General Arrangement Drawing - Frame View - an error occurred preventing the drawing generation. This could occur for Frames which included a Portal Frame object out of the plane of the Portal Frame and where the Portal Frame was not correctly associated with the Frame’s grid line (12294).
  • Report - Concrete Beams - when the “End forces” item was included in the active Concrete Beam Member report style, an error occurred which prevented the report from being generated (12395).


The number in brackets after an item denotes an internal reference number. This can be quoted to your local Support Department should further information on an item be required.

32bit (x86) and 64bit (x64) Versions

Service packs are available for both 32bit (x86) and 64bit (x64) versions of Tekla Structural Designer. Before downloading, check which version you have currently installed via the Information button at the top right of the Tekla Structural Designer window, then download the appropriate service pack.

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