There is a large difference in the mo- bilized peak value of the pullout force of lower nails, and the pullout forces of uppe1r2 oafn1d6 middle nails. This difference is more than 100% from the pullout force of the upper and middle nails. 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 ...