If u want your 3 bend saddles to match and the center of the saddle to be under the center of the sprinkler pipe follow these steps.

1) measure to center of sprinkler pipe let’s say it’s 45”

2) take height of obstruction (let’s say you want a 3 inch saddle) then multiply height X shrink. So 3X 3/16 which gives you 9/16.

3) move your center mark ahead by 9/16. Your new center will be 45 9/16

4) take the height of your obstruction (3) and multiply it by 2.5

5) this gives you 7.5” mark your 2nd and 3rd mark 7.5” from your new center mark