# How to join a hollow shape with another body
**URL:** https://discourse.shapr3d.com/t/how-to-join-a-hollow-shape-with-another-body/35909
**Category:** Modeling Questions
**Created:** [January 5, 2025, 11:15am UTC](https://discourse.shapr3d.com/t/how-to-join-a-hollow-shape-with-another-body/35909 "2025-01-05T11:15:55Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@not\_karl](https://discourse.shapr3d.com/u/not_karl)
#### Post date: [January 5, 2025, 11:15am UTC](https://discourse.shapr3d.com/t/how-to-join-a-hollow-shape-with-another-body/35909/1 "2025-01-05T11:15:55Z")
Hello,
I have a need which I have solved in a way that does not seem optimal. I have a shell which I am trying to combine with another body, while preserving the shell.
Using this model linked [Shapr3D Webviewer](https://collaborate.shapr3d.com/v/SkIxP20dqqsrj2MAVH_DM) as a reference.
I would like to join the hollow triangle with solid and be left with the two objects combined, but the triangle still hollow.
Right now I am subtracting the triangle, deleting the remaining body, and then copying the hollow triangle back and doing a union.
Is there a better way to accomplish this task?
Thanks,
Karl
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### Author:  [@SCALEMODEL](https://discourse.shapr3d.com/u/SCALEMODEL)
#### Post date: [January 5, 2025, 2:09pm UTC](https://discourse.shapr3d.com/t/how-to-join-a-hollow-shape-with-another-body/35909/2 "2025-01-05T14:09:20Z")
Take the triangle and subtract but keep the removed body.
Once removed delete the left over part and union
