Dimension for pyramid

We do not have a practice pyramid…
however we do have a bar that we have used that is 30" off the ground. We want to place the 60" bar the proper distance away from the 30" bar.
What is the dimension from the imaginary vertical line that passes through the 30" bar to the imaginary vertical line that passes through the 30" bar?

Can someone that built a practice pyramid please check by using 2 plumb bobs and see how far apart they are.

(Is it 12.12)

The pyramide’s side’s angle is 68deg IIRC, you can check in the manual.
Because of that the distance between the pipes’ centers would be 30*cot(68deg)=12.12in approx, like you wrote.

Yes, it is a 68 degree angle.

The manual will tell you everything you need to know. Pyramid drawings start on page 34 of the Game Specific Drawings.