Issue with line thickness while trying to create a graphic

Questions
1

Hello,

I am trying to do a graphic in which I have lots of horizontal lines that connect to each other with different colors. I would like the lines to have an increased thickness to be more visible.
When I increase the thickness, the lines not only get vertically bigger but also horizontally, which prevents them to connect at the exact spot and causes them to overlap each other.
I made a simplified version of the problem to illustrate.
Is there a way to specify only a vertical thickness and thus prevent this overlapping issue?

Open in Wolfram Cloud ↗

Thank you very much,

Seraina Hügli

2

Try looking at CapForm. From memory I think you might need to set this as “Butt”.

3

Yes that was it thank you very much!