stackup

And there was the "stackup game," in which the children were told to lie nude on top of their teacher, making a stack.

Worst-case tolerance analysis is the traditional type of tolerance stackup calculation.

Likewise, the need for specialty wads or extra wads, in order to achieve the desired stackup distance to achieve a full and proper crimp for a fixed shell length, say 2-3/4", causes the steps to differ slightly when handloading such shells.