I am installing steps on a steep grade from the back of the house to the driveway. I am using 4X6
preasure treated. The steps are 3' wide and 2' 8" deep and 6" high. As I move up the sloop I go further down. I am at the steepest part now and it does gentel out as you goe up. I estimate needing 10 steps and I am at step 4.