When placing unistrut (trapeze) hangers, you might need the unistrut part to have a specific increment. With MEP Hangers, it's possible to specify an increment for both family-based and Fabrication Hangers.
Unistrut Increments for Fabrication Hangers
If you are modelling your MEP systems using Revit's Fabrication Part functionality, you will need to use Fabrication Hangers.
To be able to control the unistrut increment for Fabrication unistrut hangers, first, you will need to create a Project Parameter. You can find Project Parameters under the Manage tab in Revit.
Here, click the icon for "New Parameter".
The new parameter must be named "Unistrut Increment", it needs to be a Type parameter, and the discipline and the type must be set to "Common" and "Length". It also needs to be assigned to the "MEP Fabrication Hangers" category. Click OK to finish.
Now find a unistrut (trapeze) hanger in your project, open the Type Properties, and enter your preferred value in the "Unistrut Increment" parameter. Click OK.
And that's it! From now on, this particular Fabrication Hanger type will be placed with the preset unistrut increment. In this example, I'm using metric units, but it will work with imperial as well.
Also, if after the hanger insertion you need to modify the unistrut hanger by dragging one or both of its rods , you can use "Update Size" to correct the unistrut length according to the same predefined increment.
Unistrut Increments for family-based hangers
For family-based hangers, it's even simpler since our provided families already have the "Unistrut Increment" parameter.
In the Type Properties of unistrut hanger families, you will find the "Use Unistrut Increments" parameter. If the checkbox is ticked, the family will use the value specified in the "Unistrut Increment".
To learn more about our provided families of hangers & supports and the parameters that you can modify, read this Introduction, Features and Functionality article.