Hi,

I am trying to separate the curves from this mass into three separate list as like

- diagonal left
- diagonal right
- the perimeter curves

But do not have an idea about how to proceed further. Once I try to isolate the perimeter curve using Surface,Perimeter curve node I am getting the curve from the location of mass in the family environment. not from the location of mass in the project environment as you can see in the attached pic.

I hope somebody can guide me in the correct way to solve this problem.

I am attaching my graph here for your review.

Beam By curve - V2.1.dyn (23.7 KB)