Most of the places I have worked for make it a policy to not put a flat pattern on the drawing.
Then if something goes wrong, it is based on the bend tables and it is your fault. If you just put the finished dimensions and tolerances you want on the bent part, you can provide the press brake guy with a shop drawing or something to help out if it is your own factory?
Michael R. Jenkins P.E.
Design Engineer
Direct: 816-801-2332
Fax: 816-891-9432
Commercial Vehicle Systems
Haldex Brake Products Corporation
10930 North Pomona Avenue
Kansas City, MO 64153-1215