Draft and depth checker
Relief depth and sidewall draft, checked against PCI guidance for architectural precast.
1/8"2"
Steep (1:1)Shallow (1:16)
1 : n means one inch of taper for every n inches of depth. Smaller n is steeper and strips easier.
Feature type
Verdict
Based on PCI guidance for architectural precast: keep design depth generally in the half inch to one inch range, hold minimum positive draft of one in twelve with one in eight preferred, go steeper for narrow or delicate sections, and give relief deeper than an inch a wide depressed area.