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title: Boundary Struts
slug: software/boundary-struts
description: The Boundary Strut Diameter feature in Carbon Design Engine allows you to set the diameter for all struts on the surface, regardless of the parameters applied throughout the rest of the lattice.
docTags: 
createdAt: 2024-06-06T00:05:50.163Z
---

# Accessing Boundary Struts

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![Boundary Strut in Strut Lattice Operation](https://res.cloudinary.com/carbon3d/image/upload/t_auto_quality_format/Education/Software/Design-Engine/Tools-Features/Boundary-Strut/Boundary_Strut_Features_08-2023.png)
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**STRUT LATTICE **(operation)

- Advanced (tab)
- Boundary Struts (sub-menu)
- **Boundary Strut Diameter**
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# Boundary Strut Diameter

The **Boundary Strut Diameter** feature allows you to set the diameter for all struts on the surface, regardless of the parameters applied throughout the rest of the lattice. This can be useful with multi-zone lattices to provide a consistent surface appearance.

The example below has two different strut diameters:

- 0.5 mm struts in a perimeter zone
- 1.0 mm struts in a center zone

The boundary strut diameter has been set to match the larger 1.0 mm diameter.
Note in the perimeter zone that the surface struts change while the interior struts remain unchanged at the smaller 0.5 mm diameter.

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![Boundary Strut Change](https://res.cloudinary.com/carbon3d/image/upload/t_auto_quality_format/Education/Software/Design-Engine/Tools-Features/Boundary-Strut/boundary-strut.gif)
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![Boundary Strut Change](https://res.cloudinary.com/carbon3d/image/upload/t_auto_quality_format/Education/Software/Design-Engine/Tools-Features/Boundary-Strut/boundary-strut_section.gif)


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