HELP - To Split Floor

Hello, I will be grateful if anyone can help me find a solution.
I’m beginner on dynamo and i’m trying to split floor by any element (wall, beam, detail line…)
In the example below, i have three floors that i managet to split by a wall but i get 9 floors
How can i ask dynamo to remove the first three floors at the end of the operation only ??


Here is,

Everything before the Passtrough node (Node custom) is like you,

Be careful not to stay especially in automatic mode.


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Hello Christian,

Thanks a lot, it works very well

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