David Bolton Exit Device Trim for Outside Operation: Matching the Function to the Opening Before the Schedule Ships What Is Exit Device Outside Trim -- and Why Does It Matter? Exit device outside trim is the hardware component mounted on the pull side of a door equipped with panic or fire exit hardware. The exit de... access control hardware exit devices hardware schedules outside trim panic hardware Aug 31, 2026 Our Blog
David Bolton Communicating Function Locksets: When Both Sides of the Door Need a Key What Is Communicating Function on a Door Lock? This article covers the communicating lock function (commonly coded F15) -- what it does, where it belongs, and the specifying decisions that trip up eve... communicating lock cylindrical locksets hardware schedules lockset functions mortise locksets Aug 18, 2026 Our Blog
David Bolton The Case for a Fourth Hinge: When Three Just Is Not Enough Why the Three-Hinge Default Leaves Some Doors Underhung Most commercial doors get three hinges and move on. For a standard 3'0" x 7'0" x 1-3/4" hollow metal door in an office corridor, that is exactly... commercial door hardware door hardware specification fire door compliance hardware schedules hinges Aug 11, 2026 Our Blog
David Bolton Passage Function vs Night-Latch Function on Exit Devices: Choosing the Right Outside Trim for the Opening Why the Outside Trim Function on an Exit Device Is Not a Minor Detail This article explains the operational difference between passage function and night-latch function on exit device outside trim, an... egress hardware exit devices hardware schedules lockset functions outside trim Jul 19, 2026 Our Blog
David Bolton Classroom Function Exit Device Trim: Why the Outside Lever Choice Gets Misread Before the Hardware Set Ships What This Article Covers and Who It Helps Classroom function exit device trim is one of the most frequently misread entries on a hardware schedule. It looks like a lever trim option, but it controls a... classroom function trim exit devices hardware schedules panic hardware trim school door hardware Jul 4, 2026 Our Blog
David Bolton Dummy Trim vs Night Latch Trim on Exit Devices: Picking the Right Outside Function Before the Door Gets Prepped Why the Outside Trim Function Gets Chosen Last and Causes Problems First This article explains the practical difference between dummy trim and night latch trim on exit devices, who each function is ri... egress exit devices hardware schedules outside trim panic hardware Jun 27, 2026 Our Blog