David Bolton Grade 2 Passage Knob Latchsets: Why the Function Gets Specified on ADA-Route Doors Before Anyone Checks the Code Why a Perfectly Functional Passage Knob Can Still Fail an Inspection This article is for facility managers, commercial contractors, and project architects who need to understand where a Grade 2 cylind... ADA compliance commercial door hardware cylindrical locks door schedule passage latchset Jun 18, 2026
