Need help separating objects

advice

#1

Hello, I’m new to SketchUp, I am currently using it for free. I’m drawing a simple object and I need help for this problem:

I make two lines inside of an another object in order to make a thing like a barrier, when I pull it up it goes like this:

But instead I want it to become a separated object, so it won’t interact with the other face. It should be like a barrier inside that object. How can I do that?


#2

Draw one side at a time and make it a component or group before you draw the other side.

What exactly is this thing supposed to be?


#3

Press Ctrl when you pull it up. And later, don’t forget to erase the bottom lines.