How to delete elements in revit?

dangthanhnam01.kt199 October 10, 2016, 4:18pm 1

Originally.

Result:

This is part of the job and it does not work.

Konrad_K_Sobon October 10, 2016, 4:31pm 2

1 Like

dangthanhnam01.kt199 October 10, 2016, 6:15pm 3

Thank you.