Connecting lines

Why can’t I divide the lines in two to make three lines for beams? Now i’ve got 12 points and 6 beams in x-row. But I don’t want the beams in my ground floor.

Please upload a simplified version of your gh file. (26.4 KB)

this is my file

example Edited (24.5 KB)

Like this?

Yes this is it, thank you so much!!