# 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

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FYI6n0ke54Jyy86QrFNc7%2F0.jpeg?alt=media)

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.

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FWapJt4YME3TN2UczQAMb%2F1.jpeg?alt=media)

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

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FJ7DavFB7KDiRDySA5hGJ%2F2.jpeg?alt=media)

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.

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FbDjRuScClcXqU2dZMfC1%2F3.jpeg?alt=media)

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**.

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FNxlWGGJwclZGmRdZxZNo%2F4.jpeg?alt=media)

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.

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2F9EyCmTMv8fy5vPf2a0SB%2F5.jpeg?alt=media)

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.

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2FySN2EPb4MQyUZzQI4rZP%2F6.jpeg?alt=media)

### Unistrut Increments for family-based hangers

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

![](https://239424168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FqtUsszuAWXIZhQhrvjnb%2Fuploads%2F0W2UO06q7GSChcB4aIpZ%2F7.jpeg?alt=media)

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**](https://docs.besmart.software/3d-modeling-and-design/mep-hangers/families-of-hangers-and-supports/introduction-features-and-functionality) article.
{% endhint %}