Support articles

Why do I get a warning "continuously restrained by precast concrete deck?

Question Why do I get a warning "continuously restrained by precast concrete deck"?   Answer The default beam property, which is carried over from the composite beam with profiled metal decking, is that the Top flange is continuously retrained in the construction stage. This is incorrect for a precast composite beam so a warning is issued if the restraint is NOT set to No, or edited via the Edit dialog > Lateral restraints page (via the right click context menu).      If you set to No then the validation warning is removed and the construction stage checks in accordance with SCI P401, Cl 4
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by Trimble Solutions UK
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  • Precast
  • validation
  • warning
  • continuously
  • restrained
  • concrete
  • deck

How do I override the Cpe & Cpi values for a wind zone?

Question How do I override the Cpe & Cpi values for a wind zone?   Answer There is no dominant opening command in Tekla Structural Designer, however, you can edit the Cpe and Cpi values of the wind zones. To do this follow the steps below: Create the wind model Ensure your model has wall and roof panels defined and run the Load ribbon > Wind Load group > Wind Wizard... command Create wind loadcases via the Load ribbon > Wind Load group > Wind Loadcases command Open a Wind view and display the Zone loads. You will need to have a wind loadcase selected in the load case drop list
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  • Cpe
  • cpi
  • edit
  • zone
  • wind zone

Why do I get an “Error while saving file!” message when attempting to save a model file?

Question Whilst creating a model in Tekla Structural Designer, I attempted to save the model file and received the following error message.   Do you have any idea what has caused this and how I can save the work I’ve done? Answer There are three potential ways to get around this issue: Try saving under a different file name and in a local location, such as your desktop etc.   Try saving the core of the file (File > Save Model Only).  This will save a copy of the model, but strips out all of the analysis and design results.  This means that these processes will need to be repeated.   We
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  • File
  • save
  • error
  • Error while saving File!

Why do I get an analysis element too short error/warning?

Question Why do I get "an analysis element length is lower than the limit", error or warning?   Answer The “analysis element too short” error or warning, is reported when an analysis element is shorter than the error or warning limit set under the Home ribbon > Model Settings > Validation page, as shown in the screenshot below.   We build the physical model by placing the beam, column or other objects between support points. Behind the scenes, Tekla Structural Designer builds the analysis model for you automatically. Two incoming members will result in a beam split into three analysis
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by Trimble Solutions UK
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  • validation
  • analysis
  • element
  • too short
  • error
  • warning

Tekla Structural Designer 2017 Service Pack 1

This release will upgrade your Tekla Structural Designer installation to Tekla Structural Designer 2017 Service Pack 1 version number 17.0.1.41 and should be installed to ensure optimum function of the program.   It includes a number of new features together with enhancements and issue resolutions as detailed below (a number of more minor fixes are not listed). If you are updating from a version earlier than Tekla Structural Designer 2017 (version 17.0.0.37) you can find details of enhancements and fixes included in all previous releases in Tekla User Assistance (TUA) and Tekla Downloads. 
by Tekla Structural Designer Development Team
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How do I make my slab reinforcement run parallel to angled beams or slab edges?

To change the angle at which the reinforcement runs in a slab, you need to adjust the Rotation Angle property of the slab panel.  By default, all slabs will have a rotation angle of 0 degrees, as shown below.  This means the X direction reinforcement for this slab panel will run horizontally, from left to right, when viewing a 2D plan view.  The Y direction reinforcement will always be perpendicular to the X direction reinforcement.   Increasing the slab’s Rotation Angle (i.e. specifying a positive angle) will rotate the X direction reinforcement anticlockwise, whereas a negative angle will
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by Trimble Solutions UK
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  • slab
  • reinforcement
  • parallel
  • rotation
  • angle

Is there a quick wizard for placing purlins on a sloped roof in Tekla Structural Designer?

Question Is there a quick wizard for placing purlins on a sloped roof like in Fastrak Building Designer? I can find ways to place purlins and copy and paste them round, but the old way was great for filling in a big span without much hassle. Answer Edit Menu > Create Infills The Edit menu contains a very useful command called Create Infills that can be used to place multiple layouts (by number, by spacing, by max spacing) of elements in single or multiple bays. The command is only active when in a plan or slope scene view and can only be used when the bay is enclosed by elements i.e.
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by Trimble Solutions UK
0
  • wizard
  • multiple beams
  • purlins
  • sloped
  • roof
  • Create Infills

Why does my concrete member fail the Bar Limit Checks when the Link Spacing is within the valid range?

Problem My concrete beam or column has passed the design for all strength checks, but is still being marked as failing for the Bar Limit Checks.  Right clicking on the member and selecting the "Check Member" option shows that the actual “Link Spacing” for the member has the same value as the “User Minimum Clear Link Spacing”, so why is this marked as a fail?   Solution In the “Check Member” window shown above, the “Link Spacing” value is a centre-to-centre spacing, showing a value of 100mm in this example.  The “User Minimum Clear Link Spacing” however, is a clear spacing distance between
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by Trimble Solutions UK
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  • Bar limit check
  • fail
  • concrete
  • link spacing

When I export a drawing to DXF why are the steel columns drawn at twice the size?

Question When I export a drawing to DXF why are the steel columns drawn at twice the size? Is it possible to draw them at the correct scale?   Answer Steel columns are always drawn at 2x ‘scale’ in the scene views. This is to ensure that they can be seen.   When exporting to DXF this option is carried over by default. The setting can however, be edited via the Draw > Edit command > Options > Planer Drawings > Columns page by unchecking the option Steel Columns 2x scale for steel columns       
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  • DXF
  • scale
  • column
  • twice
  • size
  • export

When I right click over a brace I do not get the option to check or design the brace, as I do for other elements. Why is this?

We suspect you are referring to braces that have been defined as a pair i.e. X, K, V or A bracing. When you hover over braces that have been input as a pair both braces are highlighted as the screenshot below. This means that when you right click, you are bringing up a context menu that relates to both elements. Certain options are only available for individual elements.   In order to review the check or design results (and other options) you need to ensure that only one individual brace is highlighted. You can do this by using the Tab or Up/Down cursor keys to cycle through the available
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by Trimble Solutions UK
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  • design
  • Check
  • right click option
  • context menu

How do I assign a wall as a Shear wall and not a bearing wall, when importing from Revit into Tekla Structural Designer?

When generating a Revit model the Structural Usage property defines the type of wall. The default is Bearing which when exported to Tekla Structural Designer exports the wall as a bearing wall. If you wish to export the wall as a Shear wall then change the Structural Usage property to Shear within Autodesk Revit prior to exporting.  
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by Trimble Solutions UK
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  • Shear wall
  • Bearing wall
  • Revit
  • integration
  • assign
  • import

Where do the default values for cracked and uncracked properties of concrete come from?

Question Where do the default values for cracked and uncracked properties of concrete come from? Answer 1. Modification Factors Analyse ribbon > Options > Modification Factors > Concrete allows you to define the factors for use in the different analysis types performed.   These factors are applied to the various element types, based on whether the section is specified as cracked or not in their member properties. The factors reduce the full short term stiffnesses of the members to their long term values, which allows for long term effects, such as creep, cracking and shrinkage, and
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by Trimble Solutions UK
3
  • cracked
  • uncracked
  • concrete
  • properties
  • creep
  • cracking
  • deflection

I have a model that has both column and matt foundation support reactions. How do I turn off the Matt foundation reactions to declutter the Results view?

Question Currently, the Results View > Support Reactions group controls the display for all support types (Column, Walls, Matt foundations etc.), so everything is either On or Off in the scene view being displayed. There are currently no Scene Content controls to further refine the display.   So, how do we turn off the Matt foundation reactions to declutter the Results view? Answer Sub Structures The solution is to create a scene view that only has the items you wish to view results for. You can achieve this by using the Sub Structure command within Tekla Structural Designer. Use the
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  • Support Reactions
  • Results View
  • Turn On/Off

When should I use the "Mesh 2-way Slabs in 3D analysis" option?

Introduction In Tekla Structural Designer you have the option to mesh 2-way slabs in the 3D analysis.  As a default this option is not selected and typically we do not encourage it. So the discussion here is about: When should slabs be meshed in 3D? Since it is possible why would you not just do it all the time? Traditional Structural Idealisation Structural engineers have not traditionally created large FE models of entire buildings, the ability to do this is a relatively recent phenomenon. Traditionally engineers analysed one floor at a time, or even one continuous beam at a time.  This
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by Trimble Solutions UK
4.2
  • Mesh
  • 2-way slab
  • analysis
  • 3D

Why am I unable to review wind drift tables for any combinations?

Question I have validated the model / run the analysis and designed using Design All (Static), however, when I go to the Tabular review data, I am unable to review wind drift tables for any combinations. Why? Review view   Tabular Data   View type = Wind drift Material type = Steel and Concrete, to pick up steel and concrete element type in the table Characteristic = Column, to pick up all columns   Results are available for wind load cases   No results are available for service combinations.   Answer Check if your combinations include wind load service cases If no service wind load cases
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  • Wind Drift
  • combination
  • None
  • Service Combination
  • results

I have validated the model but it is showing "?", saying validation has not yet been performed. Why?

This is to be expected. You will need to click on the + symbol to the left of the ? mark in order to expand the validation branch of the tree. (Clicking the - symbol contracts the branch). You will see that there are three types of validation Model, (which is undertaken when you press the validation button) and then Analysis, and Design   2 and 3 are only undertaken when you perform an analysis and design process.   If we perform a design, (which performs both an analysis and design), then you will see that you will obtain ticks or crosses against the analysis and design that have been
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  • validation
  • Question Mark
  • Not Performed

Is there a way to stop the Solver/Design running while it’s solving?

Question Is there a way to stop the solver running while it’s going? I’ve noticed that if I try to run a model which, whilst valid according to Tekla Structural Designer, has some “overly-pinned” members that the solver takes hours to run through, as it calculates parts of the structure deflecting off to infinity. Answer During an Analysis/Design process a Cancel button will appear in the bottom left of the taskbar next to Show Process. Press this button to stop the analysis/design.   We recommend that you run the analysis method of choice via the Analyse ribbon for just the self weight and
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  • Cancel
  • design
  • analysis
  • Stop

Where can I find the Autosave file in Tekla Structural Designer?

Autosave is only used whilst you are in the software to protect against unforeseen issues whilst using the program. The Autosave feature is controlled via the Home ribbon >Settings group > Settings command   In the unlikely event that the software crashes whilst in use, upon re-starting the program it will identify if an Autosave exists and offer to recover it. This Autosave file/location can be determined via the registry (Start > Type "Regedit". Note you may require administration rights) and will relate to the version of the software you have installed. You can determine the
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  • autosave location
  • autosave
  • location
  • save
  • recover file

How do I define an element in the model with zero density?

When using wall panels that span vertically, an element is required at the base of the structure to pick up the load decomposition. You may wish to place elements in the model that do not add weight to the overall structure. Create a General Material Property with zero density Click Home > Material. Open the Material page Set the Material type to General Click Add Define an appropriate property but with zero density.   Place an analysis element at the base of the wall ensuring you assign the material grade defined above Ensure Characteristic is Analysis element Ensure Material type is
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5
  • zero density
  • density
  • weight

Why will the analysis not complete when my model only has tension only bracing?

Problem In some rare problematic models/ loading situations, where most or all braces may experience compression and become inactive, can cause instability. This can prevent an analysis solution from being found. Resolution Tekla Structural Designer 2017 has introduced Relaxation factors, as a means of resolving this issue. Relaxation factors control an amount of nominal compression, that tension-only braces can undergo while remaining active during analysis iteration. When converged, these tension-only braces will still have only either zero or tension force. The process is entirely
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by Trimble Solutions UK
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  • tension only
  • relaxation factor
  • analysis fails
  • analysis does not complete

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