1. in lieu of counting and giving the discrete number of instances.
for example if you have a sheet metal part where all the break radi is .5 in, you would leader one radius and annotate ".50 TYP".
or
2. If you have a detail that occurs in 6 places on the drawing, you can add to the detail title "TYP 6 PL" meaning that all six places are the same.
Bacically you are saying all the things that look like "THIS" mean "THIS"
However, according to the latest standard, TYP is no longer used.
ASME Y14.5M-1994
1.9.5
1.9.5.1
1.9.5.2
1.9.6
"No one can make you feel inferior without your consent. "-Eleanor Roosevelt
