# Create Roof Truss Type From Model Lines

* Draw Model line in the plan from one wall core to another wall core (or from-to support elements) at correct level (level of wall’s top)
* Start and end points of Model line will also be the start and end points of truss
* Start and end points must be in correct positions - middle points (center line) of the heel webs
* Select Model line and run the **Create Roof Truss Type from Model Lines** function directly from **Truss+** menu

![](/files/YFqV8rHBMGTilnF86QCI)

### T4R Truss Builder

* There are three graphic window commands: **Zoom**, **Pan** and **Add Web** 
* Colored symbols in the right top tile of the graphic window show all snap types which are visible and can be used when adding new webs
* Main geometrical parameters of the new truss boundary are shown; in the bottom tile of the window
* Boundary of new truss is divided into the panels: P1,P2, …. Number of panels depend on the number of roof slopes (number of top chord slopes) and the number of bottom chord slopes

![](/files/FhqpfLHtoNyNUlKrfwJO)

* With the Add Web command user can draw vertical and diagonal webs
* Start and end points of webs connect to the nearest snap points of top and bottom chords
* To delete a web – select it and push the **Delete** button on your keyboard
* When the profile of the truss is ready press **OK** button on the graphic window

![](/files/z8EoIcGU9oIOZvP2oWh2)

* New dialog window opens to define a new truss family name and it’s global parameters in the project: ‘Truss Group’, ‘Framing Member Mark’ and ‘Truss Type Description’
* Correct selection of **Truss Group** allows to use this truss in different functions like Generate Trusses by System Grid 
* ‘Family Name’, ‘Framing Member Mark’ and ‘Truss Type’ description depends on the user's wish

![](/files/N6coZX06AoSwvsesCAsg)

* New truss family is automatically inserted in place of Model line
* Types of chords and webs used in new truss depend on Truss Design Settings – Default truss type for **Truss Builder** 
* Number of bottom chords depends on Truss Design Settings – Max distance for bottom chord. Bottom chord splits in the middle of truss or in location of the nearest ridge
* This new truss family can be used in other roof framing functions like: Generate Trusses, Copy/Array/AutoArray Truss etc.
* New truss family can be used if number of top chord slopes is equal to the number of roof slopes

![](/files/nUBK7yC8rCrIIslonyEg)

**Truss Builder** allows to create a new truss with multi pitched bottom chord for a multi pitched roof as shown in the example

* Draw Model line in plan from one wall core to another (or from-to support elements) on correct level (level of wall’s top)

{% hint style="info" %}
**Note:** Use Model line to draw desired profile of bottom chord in new created section view
{% endhint %}

* Start and end points of Model line will be start and end points of the truss
* Start and end points must be in correct positions: middle points (center line) of the heel webs
* Select Model line and run Create Section View by Model Line

![](/files/cHVlRolPk2nXjZDmVoAp)

* Select new Model lines and run the **Create Truss by Model Line** function from **Truss+** menu

![](/files/WPa9ZZhNNPx34ju896JY)

* Draw webs in the graphical window of **Truss Builder**

![](/files/W0D075jCvueiyenNBue4)

* Select Group, write new truss family name and fill values of other parameters. Truss will be saved in your database.

![](/files/pmtsuwzf4qnYYTfSlsgD)

* New truss will be created in the place of Model line. Section view will be automatically deleted.

![](/files/snXTRCVmkM0YgWyVUfJr)

* To insert trusses for the remainder of roof - select **Copy/Array/AutoArray Roof/Floor Truss -** enter parameters and click **OK**

![](/files/2CFFoYSjld8kuDbbiEsl)

![](/files/FunKabayu8mlpe2XDoju)

![](/files/grua9nfEDWPtNFmts4f6)


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