Find a weight you can lift four repetitions with, the fourth repetition you must struggle to accomplish. Divide this best set of 4 reps by .8. Round the result to determine the factor you will use to figure percentages to set up your routine.
Example:
Best set of 4 reps on bench press is 225 pounds
225 divided by .8 equals - 281.25 - rounded to 280 lbs
1 set - 10 reps - @ 50% of 280 lbs. = 140 lbs
2 set - 8 reps - @ 60% of 280 lbs = 170 lbs
3 set - 6 reps - @ 68% of 280 lbs = 190 lbs
4 set - 4 reps - 4 rep starting weight = 225 lbs
Add 5 lbs or 10 lbs when you can complete the Pyramid
Pendulum Rack System