# Specifying Unistrut Increments for Fabrication and Family-based Hangers

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

![](/files/WYpINvUFlyBSvpmeufCA)

If you are modeling 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.

![](/files/qyRHfZlA6NxAz9BE0ngd)

Here, click the icon for '**New Parameter**'.

![](/files/B8i3HlTelXPvMuzUay5w)

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.

![](/files/irULm1MDRy5DZy2FNRJe)

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**.

![](/files/8MAOhUPjhADcsjHtJqYm)

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.

![](/files/THhiq10qa3wpoGSZVykb)

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.

![](/files/Sr7hKd71XJxYFaXmHWnF)

### Unistrut Increments for family-based hangers

For family-based hangers, it's even simpler since our provided families already have the '**Unistrut Increment**' parameter.

![](/files/xd9ZMaGF9wmkcBArKcrl)

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**'.

{% hint style="info" %}
To learn more about our provided families of hangers & supports and the parameters that you can modify, read this [**Introduction, Features and Functionality**](/3d-modeling-and-design/mep-hangers/families-of-hangers-and-supports/introduction-features-and-functionality.md) article.
{% endhint %}


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