# Copying Elements that don’t form a valid body

**URL:** <https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026>\
**Category:** Modeling Questions\
**Created:** [May 26, 2021, 7:18pm UTC](https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026 "2021-05-26T19:18:35Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![UCS308](https://avatars.discourse-cdn.com/v4/letter/u/7ab992/32.png) [@UCS308](https://discourse.shapr3d.com/u/UCS308)\
**Post date:** [May 26, 2021, 7:18pm UTC](https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026/1 "2021-05-26T19:18:35Z")

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In the screen shot I am going to attempt to attach to this, the horizontal partition, has 2 dados marked into them. I want to have the exact same dado, in the underside of the top, in the exact same spot. On complication is that the top and the partition are different lengths, and this is why I want to make sure the dados are copied/translated/replicated exactly.

I am pretty sure there is a way to do this, but I am not sure what it is.

Thanks.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/8/8f0e1d9d3c1547501d2a01848f8854b7d790f357.jpeg)

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [May 26, 2021, 11:32pm UTC](https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026/2 "2021-05-26T23:32:05Z")

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Create a plane on the underside surface of the top. Select the line edges of the dados and project them to that plane. Finish the 3 lines to make a rectangle in sketch mode and then extrude cut.

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [May 26, 2021, 11:39pm UTC](https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026/3 "2021-05-26T23:39:00Z")

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Another way would be to extrude the bottom of the dados (using “new body”) up to the top and subtract them from the top. In that way you have your dados and partitions.

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**Author:** ![UCS308](https://avatars.discourse-cdn.com/v4/letter/u/7ab992/32.png) [@UCS308](https://discourse.shapr3d.com/u/UCS308)\
**Post date:** [May 28, 2021, 4:24am UTC](https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026/4 "2021-05-28T04:24:37Z")

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Thanks. I’ll give these a try tomorrow.

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 28, 2021, 5:15am UTC](https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026/5 "2021-05-28T05:15:26Z")

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Here’s an easy way to add two dados above. Use the **Project** tool.  
-Mike

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/5/58845a40f2541b1fd2fc7a9aae5d34a700627539.MOV](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/5/58845a40f2541b1fd2fc7a9aae5d34a700627539.MOV)

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**Author:** ![UCS308](https://avatars.discourse-cdn.com/v4/letter/u/7ab992/32.png) [@UCS308](https://discourse.shapr3d.com/u/UCS308)\
**Post date:** [June 9, 2021, 3:37pm UTC](https://discourse.shapr3d.com/t/copying-elements-that-don-t-form-a-valid-body/13026/6 "2021-06-09T15:37:53Z")

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Thanks for that tip. I have used it many times already.