Hi,
Thanks for the question. Please see the attached file for a possible solution.
- I've added 3 sub-splines in one spline object, one to define the ridge, and the one each for the eaves.
![](https://i.imgur.com/meTV2eL.png)
- Add a Normalise Spline modifier and set the Knot Count to define the number of slats
- Add a Cross Section modifier to connect lines between the new vertices
![](https://i.imgur.com/LPBEpER.png)
- You can then use those with a simple RailClone object. To stop geometry from appearing on the longer splines you can use a Conditional operator
![](https://i.imgur.com/LDfz7Vd.png)
A sample file is attached.
I hope that helps,
Paul