> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to build a structural lattice on a CAD face

## Objective:

Learn how to build a honeycomb lattice on a CAD face.

## Applies to:

* Lightweighting

## Procedure:

**1. Set-Up:** [Import your CAD Part.](https://support.ntop.com/hc/en-us/articles/360049994434)

**2. Extract Faces:**

* Turn the surface of the CAD Body into a [CAD Face Variable.](/help-articles/knowledge-base/implicit-modeling/how-to-work-with-cad-bodies)

**3. Apply a Honeycomb Lattice to the Nozzle:**

* Generate a lattice with the **Periodic Lattice** block.
  * Unit cell: **Graph Unit Cell.**
    * Unit cell: Triangular honeycomb.
    * Orientation: UVW.
  * Cell map: **Cell Map from CAD Face.**
    * Face: Nozzle Face (*The face selected from the above step*).
    * UVW count: 40 X 30 X 1 (*Number of cells in the three directions*).
    * Height: 1 mm (*Cell height from the surface*).

![A Periodic Lattice created using a Cell Map from CAD Face.](https://files.learn.ntop.com/help-articles/lattices/6014606406931.png)![The cell map on the surface of the CAD Face.](https://files.learn.ntop.com/help-articles/lattices/6014711042195.png)

![The Periodic Lattice on the surface of the CAD Face.](https://files.learn.ntop.com/help-articles/lattices/6014742799891.png)

And that's it! You've successfully created a honeycomb lattice on a CAD Face.

Are you still having issues? Contact the [support team](https://support.ntopology.com/hc/en-us/requests/new), and we'll be happy to help!

## Download the Example file:

* [Example File](https://files.learn.ntop.com/Support%20Article%20Example%20Files/Knowledge%20Base/Lattices/Structural%20Ribbing.ntop)

## Keywords:

*cad face lattice conformal body offset map structural cell uvw honeycomb reparameterize coordinates lightweighting cell map on cad face*