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Tedds Engineering Library (September 2017)

Contents UK and Asia USA Australia Canada Europe Common UK and Asia Steel member analysis & design (EN1993) Significant improvements to simplify the user interface and improve the overall user experience. The user interface has also been optimized to improve performance when updating design results. Options for the analysis output have been simplified and a summary table of the key design results can also be included. Steel sheet piling design (EN1997) New calculation which checks the stability of either a cantilever or a propped/tied steel sheet pile wall by determining the required
by Tedds Development Team
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Tekla Tedds 2017 - Service Pack 3

Important If you are running a 64-bit version of Windows you will require both updates. Tedds for Word Fixed Tedds for Word not saving variables to the document in some circumstances on some PC's when calculating is finished. 2D analysis Fixed Solver API not restoring the active models correctly if more than one solver model existed when undoing changes as a result of a dialog in a user interface being cancelled. Amended user interface to rename "Load cases" tab to "Loading" to ensure consistency with improved Steel member design calculations. Writing Calculations Fixed DListGetItemStrList
by Tedds Development Team
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Why is the shear capacity of a steel member higher in the minor axis?

Question: Why is the shear capacity of a steel member higher in the minor axis? I have only applied a point load in the middle of a simply supported beam ("I" section) member and find that the shear capacity is higher in the minor axis than it is in the major axis. Why is that the case? Answer: The reason the shear capacity is higher in the minor axis for some members is due to the calculated shear area (Av). When an "I" beam is loaded in the major axis you have the web resisting the majority of the shear force as opposed to two flanges when loaded in the minor axis. Example In this example
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Shear capacity
  • Minor axis

Expression Error - Script error: The Calc Item 'Sliding summary check res' does not exist in the Calc Library

Question I am trying to run the Tedds Pad Foundation analysis and design (BS8110) calculation and keep obtaining "Expression Error - Script error: The Calc Item 'Sliding summary check res' does not exist in the Calc Library.....". How to I resolve this?   Answer This is a known issue with the Development team (SRX13681) and relates to missing information in the library for a summary sliding report. We are sorry for the inconvenience on this issue. Until the issue is resolved by the Development team the workaround is to change the report output from Summary to Full . This allows the
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Pad Foundation analysis and design (BS8110)
  • Expression Error
  • Script error
  • sliding

How is the applied shear force calculated in the Tedds Steel Masonry Support (BS 5950) calculation?

Question How is the applied shear force calculated in the Tedds Steel Masonry Support (BS 5950) calculation? Answer The applied shear force used in the design of the steel masonry support is based on the self-weight of the torsion and support beam, the masonry and any additional dead loading. In the output, this is given as one variable without notes so does not explain the method used for calculation. This will be discussed in the following example. Example In the following calculation we will not add any additional load to the beam so we can look solely at the hidden calculation. In the
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Steel masonry support (BS5950)
  • Shear Force
  • applied

I have increased the reinforcement in my Hollow reinforced masonry retaining wall. Why is the moment resistance decreasing?

Question I have increased the reinforcement in my Hollow reinforced masonry retaining wall. Why is the moment resistance decreasing? Answer The Moment resistance for a Hollow reinforced retaining wall is calculated as the lesser of Asr,prov x fyd x z , where Asr,prov is the reinforcement provided to the wall, fyd is the Design yield strength And; 0.3 x fd x d2 , where fd is the design compressive strength of the masonry and d is the depth to the tension reinforcement. This would indicate that increasing the reinforcement should increase the moment resistance in the wall for the first term.
Requires Tekla Maintenance
by Trimble Solutions UK
3.333335
  • Retaining wall design (EN1992)
  • Hollow
  • reinforcement
  • Moment Resistance

Tekla Tedds product bulletin July 2017 (PBT-1707-1)

Résumé of issue Steel column design (AISC360) There is a potentially un-conservative error affecting the design of steel columns subject to the combined loading test using equation H1-2 from AISC360 2010. Occurrence This issue relates to Tedds 2017 from March 2017, Tedds 2016 from March 2016, Tedds 2015 from June 2015, Tedds 2014 from June 2014, Tedds 2013 from May 2013, Tedds 14 from October 2011, Tedds 12 from October 2009 and Tedds 11 from March 2008: Steel column design (AISC360) version 1.0.00 – 1.0.07
Requires Tekla Maintenance
by Tedds Development Team
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Tekla Tedds Engineering Library (July 2017)

Contents UK and Asia USA Australia Canada Europe Common UK and Asia RC column design (EN1992) Steel column design (EN1993) Added documentation for the key input and output variables for pre-defining input, linking calculations, batch design or automation using the Tedds Application Programming Interface (API). Tedds API Tester Enhanced to include the option to save the input and output for a calculation to a Tedds document (.tid) which can then be opened in the Tedds application or imported into Tedds for Word. The source code project for the Tedds API tester can be found in the
by Tedds Development Team
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Tekla Tedds 2017 - Service Pack 2b

Important If you are running a 64-bit version of Windows you will require both updates. Updates Version 2b Fixed Tedds API not initialising calculator correctly when no input variables are defined. This is also caused the Tedds batch design to stop working. Version 2a Fixed Tedds for Word losing all variables in the document if when calculating there was nothing to calculate. General Significant performance improvements when using steel section data lists which leads to performance improvements in all steel calculations. Tedds for Word Fixed Tedds for Word not saving variables to the
by Tedds Development Team
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Tedds for Word Error - Library not registered 0x8002801d

Problem When trying to do one of the following  Insert Calc Item from the Library Access System into Tekla Tedds for Word with the Add new Calc Section option checked   or  Send a Tekla Tedds standalone calculation to Tekla Tedds for Word   You may get the following error     Information If you are running Skype for Business 2016 but an older version of Office you will see the above error due to a problem in the Skype for Business install.   The issue is not related to the Tekla Tedds installation but related to the use of Skype for Business 2016 and an older version of Office. It
Requires Tekla Maintenance
by Tekla User Assistance Team
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When I try to use the User Interface command, the Manage User Interface dialog appears, but clicking any button freezes the program. How can I resolve this?

Question When I try to use the User Interface command, the Manage User Interfaces dialog appears, but clicking any button appears to freeze the program. How can I resolve this?   Answer To allow us to rectify the issue we need to stop the Tedds Interface Designer process. Run Task Manager (right click the Windows taskbar and select Task Manager). In the Processes tab, Locate Tedds Interface Designer (32bit), select it and then click End task.   We have discovered that there is a conflict between the Tedds Interface Designer and the Revit Accelerator process. To resolve, we need to select the
Requires Tekla Maintenance
by Trimble Solutions UK
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  • User Interface
  • Revit Accelerator
  • Manage User Interfaces

When I attempt to run the Tedds Batch Design calculation, Tedds keeps taking the windows focus. How do I prevent this from happening?

Question When I attempt to run the Tedds Batch Design calculation and then switch to another program i.e. email client to work on something else, Tedds keep taking the windows focus so I cannot do anything else. How do I prevent this from happening? Answer Within Tedds for Word, you can access the Tedds ribbon tab > More > Tedds Options    Within Tedds Options, you can then turn off the Progress log window by setting the Calculating > Progress to None, so that the Progress log does not take the focus at the end of every batch design iteration.  
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Batch Design
  • Focus

Why are bending check results for rectangular columns different between Tedds and Tekla Structural Designer?

Question Why are bending check results for rectangular columns different between Tedds and Tekla Structural Designer? I notice for example the NA depth is different. What method does Tedds use vs Tekla Structural Designer? Answer The method specified in equation 5.39 of EC2, which is used in Tedds, is a simplified approach with limited application, whereas Tekla Structural Designer uses a general and more accurate approach determined from first principles which can be applied to a wide range of cross sections. In Tekla Structural Designer the method of checking whether the reinforcement in
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Neutral Axis Depth
  • Bending check
  • Difference

I cannot calculate within Tedds - The error message "Failed to get the active instance of Word" or "An error has occurred whilst calculating, the document cannot be updated" is displayed

Question When running any of the calculation commands, an error is reported which prevents me from calculating. How can I resolve this? Answer This issue often occurs as a result of upgrading from a 32bit version of Office to a 64bit version. However, the problem can also manifest itself in several different ways, because there are several different areas of the software which rely on the Microsoft Word integration working correctly and if it has become corrupted on a system then various features may not work. These include the following: Calculating in Tedds for Word does not work Executing
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Failed to get an active instance of Word
  • An error has occurred whilst calculating
  • Failed to create new Calc Section
  • Filed during Send to Tedds
  • 0c80029c4a

When using the Snow Loading (EN1991-1-3) calculation and inputting Snow loading - "Site Details" what does the Zone refer to?

Question When using the Snow Loading (EN1991-1-3) calculation and inputting Snow loading - Site Details, what does the Zone refer to? There are no tooltips or references to assist.    Answer After inputting the Location, an Altitude and Zone are automatically calculated for you. Note these can be user adjusted. The Altitiude and Zone are used in the calculation for the Characteristic ground snow load sk.   Reference needs to be made to the UK National Annex and Clause NA.2.8. The Zone is then determined from Figure NA.1 Characteristic ground snow load map  
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Snow load
  • Zone
  • Snow Loading EN1991-1-3

How do I change the precision of the results in Tedds?

Question How do I change the precision of the results in Tedds? Answer Calculations written and included in the system library by the Tedds team are typically written with a specified result precision i.e. =?F3 where F denotes Fixed format with 3 decimal places. It is not possible to over-ride these values. Further infomation on "Results fields" can be found in the Help system. For calculations written by yourself or where result precision has not been set, then the precision of the result in Tedds is determined by a setting found in the Tedds options.     
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Results Field
  • Options
  • results

Why is a reduction factor (RF) applied to all columns in Tekla Structural Designer and not the Tekla Tedds "RC column design to EC1992" calculation?

Question Why is a reduction factor (RF) applied to all columns in Tekla Structural Designer and not the Tekla Tedds "RC column design to EC1992" calculation?   Answer Tekla Tedds uses a different and more approximate biaxial bending check method to that of Tekla Structural Designer, meaning that a 10% reduction of the concrete strength is not applied in the Tedds software for rectangular sections. Note that the 10% reduction (displayed in Tekla Structural Designer results as a reduction factor RF = 0.9, see screenshot above) comes from the following Clause and rationale: EC2 section 3.1.7(3
Requires Tekla Maintenance
by Trimble Solutions UK
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  • Concrete Design Reduction Factor
  • RF
  • Cl 3.1.7(3)
  • Compression zone

Tekla Tedds product bulletin May 2017 (PBT-1705-4)

Résumé of issue Rigid diaphragm force distribution There is a potentially un-conservative error affecting calculations with concrete shear walls. Occurrence This issue relates to Tedds 2017 from March 2017 and Tedds 2016 from November 2016: Rigid diaphragm force distribution version 1.1.00
Requires Tekla Maintenance
by Tedds Development Team
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Tekla Tedds Engineering Library (June 2017)

Contents UK and Asia USA Australia Canada Europe Common UK and Asia Batch design A new Excel spreadsheet which allows you to batch design any Tedds calculation. Input for multiple design cases can be entered into the spread sheet which when calculated will run each individual design case using the Tedds calculation specified. You can choose to interact with the calculations normal user interface or for some calculations you can choose to hide the user interface. Please note completed designs should always be manually checked in Tedds or Tedds for Word to verify whether there are any
by Tedds Development Team
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Tekla Tedds 2017 - Service Pack 1

Important If you are running a 64-bit version of Windows you will require both updates. Documentation Updated Professional Developer Tools Training Manual and associated installation for the training manual files General New option has been added to Calculating\Sketches which determines how sketches which include transparent fills are handled. Some users have reported that they experience problems when using 3rd party software to output their Tedds documents to PDF because any areas of a sketch which use transparency are not handled correctly by the software which creates the PDF. This
by Tedds Development Team
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