# Help **URL:** https://femdesign.discourse.group/c/help/8.md [Latest](https://femdesign.discourse.group/latest.md) · [Categories](https://femdesign.discourse.group/categories.md) · [Tags](https://femdesign.discourse.group/tags.md) --- ## [About the Help category](https://femdesign.discourse.group/t/about-the-help-category/58)
**Author:** [@FEM-Design](https://femdesign.discourse.group/u/FEM-Design)\ **Replies:** 0
--- ## [PointLoad - Eccentricity](https://femdesign.discourse.group/t/pointload-eccentricity/620)
**Author:** [@AndreiM](https://femdesign.discourse.group/u/AndreiM)\ **Replies:** 2\ **Last updated:** [14 October 2026 06:49 UTC](https://femdesign.discourse.group/t/pointload-eccentricity/620 "2026-10-14T06:49:58Z")
Hey I’m trying to access the eccentritcity feature for loads in FEM-Design through Grasshopper, but so far I haven’t been able to find a way to do it. Is this function currently exposed in the FEM-Design API? If not, d… --- ## [Combination method for Load groups](https://femdesign.discourse.group/t/combination-method-for-load-groups/438)
**Author:** [@Poja](https://femdesign.discourse.group/u/Poja)\ **Replies:** 41\ **Last updated:** [5 October 2026 13:10 UTC](https://femdesign.discourse.group/t/combination-method-for-load-groups/438 "2026-10-05T13:10:41Z")
Hi! Is there a way to access all these options from GH? --- ## [Reinforcement material not working in database \[SOLVED\]](https://femdesign.discourse.group/t/reinforcement-material-not-working-in-database-solved/614)
**Author:** [@IdaLea](https://femdesign.discourse.group/u/IdaLea)\ **Replies:** 3\ **Last updated:** [14 September 2026 07:50 UTC](https://femdesign.discourse.group/t/reinforcement-material-not-working-in-database-solved/614 "2026-09-14T07:50:38Z")
Hi, the material database has lost the reinforcement items. Without it I dont think it’s possible to add reinforcement though the API? Tried to make a costum material but the “define wire” will not accept it. Bes… --- ## [Load groups - subgroups with moving load](https://femdesign.discourse.group/t/load-groups-subgroups-with-moving-load/76)
**Author:** [@IdaLea](https://femdesign.discourse.group/u/IdaLea)\ **Replies:** 5\ **Last updated:** [10 September 2026 07:58 UTC](https://femdesign.discourse.group/t/load-groups-subgroups-with-moving-load/76 "2026-09-10T07:58:09Z")
Hi, I am trying to use grasshopper to create a FEM model for a train station and is therefore interested in creating moving loads that are categorized as subgroups in the load group module. Now, when I add moving loads… --- ## [PTCShape component for Slabs \[SOLVED\]](https://femdesign.discourse.group/t/ptcshape-component-for-slabs-solved/434)
**Author:** [@netsonicyxf](https://femdesign.discourse.group/u/netsonicyxf)\ **Replies:** 17\ **Last updated:** [15 July 2026 09:50 UTC](https://femdesign.discourse.group/t/ptcshape-component-for-slabs-solved/434 "2026-07-15T09:50:41Z")
The current PTCShape component is good for shape in single span beam. But for multispan continious beam, there are several issues: Some tendons in multispan continious beam do not start at the start point of the beam,… --- ## [Maximum of Load Groups Results - GH \[SOLVED\]](https://femdesign.discourse.group/t/maximum-of-load-groups-results-gh-solved/606)
**Author:** [@Arun\_N\_Dinesh](https://femdesign.discourse.group/u/Arun_N_Dinesh)\ **Replies:** 4\ **Last updated:** [15 June 2026 08:35 UTC](https://femdesign.discourse.group/t/maximum-of-load-groups-results-gh-solved/606 "2026-06-15T08:35:14Z")
Hi, I am trying to retrieve the results for the “maximum of load groups” using GH for moving loads; however, it seems that calling the “maximum of load groups” results is not possible through GH components. Could anyone… --- ## [Concentration of support forces](https://femdesign.discourse.group/t/concentration-of-support-forces/607)
**Author:** [@perbhagen](https://femdesign.discourse.group/u/perbhagen)\ **Replies:** 4\ **Last updated:** [10 June 2026 13:56 UTC](https://femdesign.discourse.group/t/concentration-of-support-forces/607 "2026-06-10T13:56:00Z")
Hi! I have modelled a column consisting of 4 diagonal elements with stiffening elements between these. As for now, they are modelled with rigid supports at the end of the diagonal elements. However, I would like to cent… --- ## [Wall and Plate Element local axis Rotation/ Fixing \[SOLVED\]](https://femdesign.discourse.group/t/wall-and-plate-element-local-axis-rotation-fixing-solved/522)
**Author:** [@Ravi](https://femdesign.discourse.group/u/Ravi)\ **Replies:** 11\ **Last updated:** [30 April 2026 13:14 UTC](https://femdesign.discourse.group/t/wall-and-plate-element-local-axis-rotation-fixing-solved/522 "2026-04-30T13:14:46Z")
Hi, I would like to know how we can rotate all wall and plate axes in the same direction using the FEM design. Or through API or Grasshopper. I’m a bit new to both GH and the API, but I believe this should be possibl… --- ## [Access to Nodal masses in Grasshopper \[SOLVED\]](https://femdesign.discourse.group/t/access-to-nodal-masses-in-grasshopper-solved/603)
**Author:** [@Krisjanis](https://femdesign.discourse.group/u/Krisjanis)\ **Replies:** 4\ **Last updated:** [15 April 2026 12:12 UTC](https://femdesign.discourse.group/t/access-to-nodal-masses-in-grasshopper-solved/603 "2026-04-15T12:12:27Z")
Hi, I’m trying to find a way to access Nodal masses using the FEM-Design Grasshopper API so I can compute the mass moment of inertia I\_z​ within the script. So far, the only solution I’ve found is to manually export… --- ## [Shell Deconstruct - FEM-Grasshopper - Shift in Coordinates \[SOLVED\]](https://femdesign.discourse.group/t/shell-deconstruct-fem-grasshopper-shift-in-coordinates-solved/601)
**Author:** [@Arun\_N\_Dinesh](https://femdesign.discourse.group/u/Arun_N_Dinesh)\ **Replies:** 5\ **Last updated:** [9 April 2026 10:08 UTC](https://femdesign.discourse.group/t/shell-deconstruct-fem-grasshopper-shift-in-coordinates-solved/601 "2026-04-09T10:08:50Z")
Hi, While deconstructing the shell from an existing FEM model, I noticed that the surface points are uniformly shifted by 0.176 m in the X and Y coordinates. Has anyone experienced this behavior, or can someone explain … --- ## [Composite Slab or Sandwich panel \[SOLVED\]](https://femdesign.discourse.group/t/composite-slab-or-sandwich-panel-solved/588)
**Author:** [@Ravi](https://femdesign.discourse.group/u/Ravi)\ **Replies:** 2\ **Last updated:** [31 March 2026 04:33 UTC](https://femdesign.discourse.group/t/composite-slab-or-sandwich-panel-solved/588 "2026-03-31T04:33:58Z")
Hi, I’m trying to model a composite slab in FEM Design, but it seems the option is not available, or I may be missing something. One approach I’m considering is to model the composite section in Grasshopper, extract th… --- ## [Exporting connection forces from global FEM-Design model to reduced model \[SOLVED\]](https://femdesign.discourse.group/t/exporting-connection-forces-from-global-fem-design-model-to-reduced-model-solved/580)
**Author:** [@Anordlof](https://femdesign.discourse.group/u/Anordlof)\ **Replies:** 10\ **Last updated:** [26 March 2026 10:54 UTC](https://femdesign.discourse.group/t/exporting-connection-forces-from-global-fem-design-model-to-reduced-model-solved/580 "2026-03-26T10:54:19Z")
Hi there, I’m trying to figure out a robust way to export connection forces from edges of selected wall elements in a global FEM-Design model, and then import those forces into a smaller, reduced design model where only… --- ## [PTC load case in a load combination via the Grasshopper API](https://femdesign.discourse.group/t/ptc-load-case-in-a-load-combination-via-the-grasshopper-api/594)
**Author:** [@kolnas](https://femdesign.discourse.group/u/kolnas)\ **Replies:** 2\ **Last updated:** [24 March 2026 15:12 UTC](https://femdesign.discourse.group/t/ptc-load-case-in-a-load-combination-via-the-grasshopper-api/594 "2026-03-24T15:12:02Z")
I am looking for a way to include the forces from the PTC (post-tensioning) cables in my load combinations entirely through Grasshopper. Currently, only the loads explicitly defined in the Grasshopper script are being i… --- ## [Rotation of a FEM model with C# \[SOLVED\]](https://femdesign.discourse.group/t/rotation-of-a-fem-model-with-c-solved/596)
**Author:** [@Ola](https://femdesign.discourse.group/u/Ola)\ **Replies:** 2\ **Last updated:** [24 March 2026 14:18 UTC](https://femdesign.discourse.group/t/rotation-of-a-fem-model-with-c-solved/596 "2026-03-24T14:18:53Z")
Hi, As I understand it, it is only possible to rotate FEM design models in the XY plane (with the rotate tool). I have a case where I want to rotate big models with only beam elements around the Y-axis, mostly the rotat… --- ## [Only one load combination is connected to FEM Design \[SOLVED\]](https://femdesign.discourse.group/t/only-one-load-combination-is-connected-to-fem-design-solved/593)
**Author:** [@perbhagen](https://femdesign.discourse.group/u/perbhagen)\ **Replies:** 4\ **Last updated:** [20 March 2026 14:01 UTC](https://femdesign.discourse.group/t/only-one-load-combination-is-connected-to-fem-design-solved/593 "2026-03-20T14:01:13Z")
Hi! I have defined 4 different load combinations. However, only one appears in my FEM Design analysis. Are there any specific reasons to why this happens? Thanks in advance! Best regards, Per --- ## [Read results from file](https://femdesign.discourse.group/t/read-results-from-file/585)
**Author:** [@Ravi](https://femdesign.discourse.group/u/Ravi)\ **Replies:** 1\ **Last updated:** [16 February 2026 10:20 UTC](https://femdesign.discourse.group/t/read-results-from-file/585 "2026-02-16T10:20:02Z")
Hi @AndreiM , Thank you for providing the solution. I am still getting familiar with Grasshopper, so please excuse me if this is a basic question. For large models, the FEM solver generates the mesh automatically when… --- ## [Extract column bar end forces](https://femdesign.discourse.group/t/extract-column-bar-end-forces/584)
**Author:** [@Ravi](https://femdesign.discourse.group/u/Ravi)\ **Replies:** 6\ **Last updated:** [14 February 2026 19:41 UTC](https://femdesign.discourse.group/t/extract-column-bar-end-forces/584 "2026-02-14T19:41:00Z")
Hi @MarcoPelle I’m looking fto extract forces for column bar end. I was wondering whether it’s possible to extract these forces storey by storey (That specific storey columns only). I’d appreciate your thoughts, or if t… --- ## [Modifying stiffness of line connection based on previous results](https://femdesign.discourse.group/t/modifying-stiffness-of-line-connection-based-on-previous-results/583)
**Author:** [@Jona995k](https://femdesign.discourse.group/u/Jona995k)\ **Replies:** 2\ **Last updated:** [9 February 2026 13:20 UTC](https://femdesign.discourse.group/t/modifying-stiffness-of-line-connection-based-on-previous-results/583 "2026-02-09T13:20:54Z")
hello. i am trying to modify line connection type based on calculated values (from analysis). Is this possible in c#? in the following picture - i would like to change the type of specific line connections shown in yell… --- ## [Cannot perform analysis due to stiffness error](https://femdesign.discourse.group/t/cannot-perform-analysis-due-to-stiffness-error/582)
**Author:** [@RSBNO](https://femdesign.discourse.group/u/RSBNO)\ **Replies:** 8\ **Last updated:** [4 February 2026 14:22 UTC](https://femdesign.discourse.group/t/cannot-perform-analysis-due-to-stiffness-error/582 "2026-02-04T14:22:52Z")
Good morning, I am having trouble understanding what this error means ‘there are no stiffness points to calculate’. I the model that i have created in GH, i have defined supports and motions, which are visible in FEM-d… --- ## [Brep surface is not planar \[SOLVED\]](https://femdesign.discourse.group/t/brep-surface-is-not-planar-solved/579)
**Author:** [@netsonicyxf](https://femdesign.discourse.group/u/netsonicyxf)\ **Replies:** 7\ **Last updated:** [23 January 2026 12:00 UTC](https://femdesign.discourse.group/t/brep-surface-is-not-planar-solved/579 "2026-01-23T12:00:55Z")
The grasshopper says it’s planar, but FEM-Design says it’s not. planar surface.gh (10.3 KB) --- ## [Unable to retrieve load case results \[SOLVED\]](https://femdesign.discourse.group/t/unable-to-retrieve-load-case-results-solved/559)
**Author:** [@TheFishTankGuy](https://femdesign.discourse.group/u/TheFishTankGuy)\ **Replies:** 5\ **Last updated:** [14 January 2026 07:55 UTC](https://femdesign.discourse.group/t/unable-to-retrieve-load-case-results-solved/559 "2026-01-14T07:55:45Z")
There appears to be a bug in the retrieval of load case results. The GetResults method retrieves only results from load combinations but fails to capture load case results. Furthermore, the GetLoadCaseResults method ret… --- ## [SurfaceLoad.Deconstruct & Update Slab surface load \[SOLVED\]](https://femdesign.discourse.group/t/surfaceload-deconstruct-update-slab-surface-load-solved/572)
**Author:** [@Arun\_N\_Dinesh](https://femdesign.discourse.group/u/Arun_N_Dinesh)\ **Replies:** 10\ **Last updated:** [13 January 2026 06:10 UTC](https://femdesign.discourse.group/t/surfaceload-deconstruct-update-slab-surface-load-solved/572 "2026-01-13T06:10:58Z")
Hi, Can someone help me understand what ‘q1’, ‘q2’, and ‘q3’ represent, and how to update the applied surface loads on slabs after deconstructing? When I use ‘SurfaceLoad.Uniform’ to add new surface loads to an exist… --- ## [Assigning selfweight of structure \[SOLVED\]](https://femdesign.discourse.group/t/assigning-selfweight-of-structure-solved/575)
**Author:** [@perbhagen](https://femdesign.discourse.group/u/perbhagen)\ **Replies:** 2\ **Last updated:** [9 January 2026 10:15 UTC](https://femdesign.discourse.group/t/assigning-selfweight-of-structure-solved/575 "2026-01-09T10:15:31Z")
Hi! Since I’m quite new to both FEM Design and FEM Design API, I am struggling with a bit basic stuff.. Would it be possible to get any guidance on how I could assign self weight to my structure in Grasshopper? … --- ## [How can I make a connection between a beam and column?](https://femdesign.discourse.group/t/how-can-i-make-a-connection-between-a-beam-and-column/570)
**Author:** [@perbhagen](https://femdesign.discourse.group/u/perbhagen)\ **Replies:** 7\ **Last updated:** [8 January 2026 13:35 UTC](https://femdesign.discourse.group/t/how-can-i-make-a-connection-between-a-beam-and-column/570 "2026-01-08T13:35:22Z")
Hi! I want to model a beam structure (truss system) that connects to a column (also a truss system). Is it possible to get any tips on how I can model a connection between the two? Not sure what I should present of mater… --- ## [Rotate sections \[SOLVED\]](https://femdesign.discourse.group/t/rotate-sections-solved/576)
**Author:** [@perbhagen](https://femdesign.discourse.group/u/perbhagen)\ **Replies:** 1\ **Last updated:** [8 January 2026 13:31 UTC](https://femdesign.discourse.group/t/rotate-sections-solved/576 "2026-01-08T13:31:43Z")
Hi! I am struggling with rotating the sections correctly. My thought is to use the LocalY value in some way. However, I am not able to figure out how it should be used. Any tips? I would like to rotate the elements lik… --- ## [Diaphragm load - Load cases \[SOLVED\]](https://femdesign.discourse.group/t/diaphragm-load-load-cases-solved/517)
**Author:** [@AndreiM](https://femdesign.discourse.group/u/AndreiM)\ **Replies:** 3\ **Last updated:** [18 December 2025 09:39 UTC](https://femdesign.discourse.group/t/diaphragm-load-load-cases-solved/517 "2025-12-18T09:39:29Z")
Hi there I would like to hear if there is a way of accessing the option set in FEM-Design, where for example the wind load cases can be created and the horizontal load is applied directly on the diaphgram: At the … --- ## [Can't find custom section \[SOLVED\]](https://femdesign.discourse.group/t/cant-find-custom-section-solved/569)
**Author:** [@perbhagen](https://femdesign.discourse.group/u/perbhagen)\ **Replies:** 2\ **Last updated:** [16 December 2025 07:55 UTC](https://femdesign.discourse.group/t/cant-find-custom-section-solved/569 "2025-12-16T07:55:51Z")
Hi, I have created my own section type and exported the section library. However, I am not able to find the section through the SectionDatabase. Does anybody know what I am doing wrong here? I can’t find the section in… --- ## [Modelling Fibre reinforced polymer jacket in Fem design](https://femdesign.discourse.group/t/modelling-fibre-reinforced-polymer-jacket-in-fem-design/565)
**Author:** [@RSBNO](https://femdesign.discourse.group/u/RSBNO)\ **Replies:** 3\ **Last updated:** [12 December 2025 09:26 UTC](https://femdesign.discourse.group/t/modelling-fibre-reinforced-polymer-jacket-in-fem-design/565 "2025-12-12T09:26:09Z")
Any idea how one would go about modelling a column with FRP jacket in FEM-design API? I wish to test added stiffness in the column and visualize stress distribution in the column. How would i ensure that the column and… --- ## [FEM-Design API install not working \[SOLVED\]](https://femdesign.discourse.group/t/fem-design-api-install-not-working-solved/566)
**Author:** [@SigveCOWI](https://femdesign.discourse.group/u/SigveCOWI)\ **Replies:** 1\ **Last updated:** [4 December 2025 14:21 UTC](https://femdesign.discourse.group/t/fem-design-api-install-not-working-solved/566 "2025-12-04T14:21:44Z")
Hi, I have attached a screenshot of the error code that appears after restarting Rhino/Grasshopper after installation of FEM-Design v24.2.2 on Rhino 7 via Package Manager. The already existing FemDesign.1.2.0.gha was re… [Next page](https://femdesign.discourse.group/c/help/8.md?page=1)