> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/efr-user-manual/calculation-types/working-with-beam-calculations/wood-beam-calculations24/assigning-material-properties.md). # Assigning Material Properties How to assign wood material design properties to beam elements and how the NDS version year setting affects available properties. Wood Beam elements in the Revit model are prepared for calculation launch by using the "Edit Wood Material" button to assign design properties. This button is found on the ribbon bar, located in the drop-down of the "Wood" icon in the "Beams: panel: ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-98f891c685cc31386e7d56411294b988c7af7a93%2Fclip0671.png?alt=media) Clicking this button will launch a selection process, and EFR will await selection of one or more elements by the user: ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-7547ebc717b75656d8dd0eca3fa7ea7f99468659%2Fclip0672.png?alt=media) The status bar at the lower left corner of the Revit UI gives details: ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-7177798ae51c09f8f57d9171245ff589bbafafd1%2Fclip0673.png?alt=media) When the user finishes the element selection process, the properties form will load in the lower right hand corner of the Revit UI. The menu will indicate the current NDS year being used to populate design properties, as well as the number of elements selected by the user. The content in the "All Section Sets Found" table will vary based on the selection made by the user. For more detail on this, refer to [Assigning To Single Element](/efr-user-manual/calculation-types/working-with-beam-calculations/wood-beam-calculations24/assigning-material-properties/assigning-single-element.md) or [Assigning To Multiple Elements](/efr-user-manual/calculation-types/working-with-beam-calculations/wood-beam-calculations24/assigning-material-properties/assigning-to-multiple-elements.md). When this window is open, the user retains full ability to interact with the Revit interface, including zoom, pan, select, changing active views, etc. Once opened, the window may be closed at any time without applying changes. The window is not docked in the corner; it may be moved to any location either on or off of the main Revit window as desired by the user. Even if the edit menu is moved off the main Revit window (or even onto another display), it will minimize or move to background along with the main Revit window. ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-63a7be534a0f47d98503f2b9cbad97ea18e39ce4%2Fclip0674.png?alt=media) For more convenient viewing of large selection sets, the window may be manually re-sized by mousing over the edge or corner of the window and dragging to the desired size: ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-0849206cf57e6657bff7032c95729522c79f49c4%2Fclip0698.png?alt=media) The version year of NDS being used to populate design property options in the "Modify" window may be viewed or changed from the EFR "Preferences" menu. This version year input does NOT control the NDS version being used to perform code checks in the ENERCALC calculation. It only alters which version-year's material properties are presented to the user in the "Edit Wood Materials" table. ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-e285371ff9194e988c7837447f0eb65b456d056f%2Fclip0678.png?alt=media) Navigate to "Preferences" > "Active Model Preferences" > "Materials": ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-071e70f5c3af4f58f7dd592c648d6e1019a16625%2Fclip0675.png?alt=media) ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-8af4d4b7e0b290c5a26f0b6c739624b95f4e6e11%2Fclip0676.png?alt=media) Users should be aware that any change to the specified NDS version year will impact calculations already created in the model using a different version. Changing the specified value in the "Preferences" menu will result in a warning cautioning the user that design data will be erased: ![](https://4249100372-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgHVzpA9PT0VcuNGp6j39%2Fuploads%2Fgit-blob-f56258073ec1f1685df098ab48b71d1d08afd355%2Fclip0677.png?alt=media) Clicking "OK" on this notification will finalize the version change and will erase the NDS design values currently assigned to existing calculations. Clicking "Cancel" will revert the drop-down selection to the pre-existing value. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.enercalc.com/efr-user-manual/calculation-types/working-with-beam-calculations/wood-beam-calculations24/assigning-material-properties.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.