David Bolton Exit Device Finish Matching Across Door Pairs: How to Keep Both Leaves Consistent When the Schedule Gets Built Why Finish Matching on a Door Pair Is Harder Than It Looks This article is for hardware specifiers, commercial subcontractors, and facility managers who deal with door pairs equipped with exit devices... commercial door hardware door pairs exit devices hardware finish hardware specification Sep 7, 2026
David Bolton Door Pull CTC: Why the Center-to-Center Dimension Is the First Decision on Any Pull Hardware Schedule What CTC Means on a Door Pull -- and Why It Drives Everything Else This article is for contractors, facility managers, and architects who need to specify or order door pulls without sending the projec... ADA hardware architectural hardware commercial door trim door pulls hardware specification Sep 4, 2026
David Bolton Office Function vs. Entrance Function Locksets: How One Wrong Code Breaks a Hardware Schedule If you have ever received a hardware submittal back with a red-line on the lock function, there is a reasonable chance the specifier or contractor confused office function with entrance function. Thes... commercial locksets entrance function hardware specification lockset functions office function Sep 3, 2026
David Bolton Reading a Sequence of Operation Diagram for Electrified Door Hardware: A Field and Spec Guide What This Guide Covers and Who It Helps Every electrified door opening -- whether it is an access-controlled entrance at a school, a monitored corridor door in a hospital, or a secured server vestibul... access control electrified hardware hardware specification life safety sequence of operation Sep 3, 2026
David Bolton Plain Bearing vs. Ball Bearing on a Door with a Closer: Why the Closer Is the Decision-Maker The Closer Changes Everything About How a Hinge Wears This article is for commercial contractors, facility managers, and architects who are specifying or replacing hinges on doors that carry a door cl... commercial hardware door closers hardware specification hinges maintenance Sep 3, 2026
David Bolton Why Plain Bearing Hinges Get Replaced Before Their Time: Understanding Load, Use Frequency, and the Closer Pairing Rule The Hinge Nobody Questions Until It Starts Sagging Plain bearing hinges are among the most common hardware items on a commercial project, and they are also among the most commonly misapplied. This gui... commercial doors door closers hardware specification hinges plain bearing Sep 2, 2026
David Bolton Kick Plate Height Standards: What the Spec Needs to Say Before the Hardware Ships What This Article Covers Kick plates seem straightforward until the spec is wrong and the wrong plate shows up on a fire-rated door or a wood door with a closer. This guide covers standard height rang... NFPA 80 commercial doors door protection hardware hardware specification kick plates Sep 1, 2026
David Bolton Cylindrical Lockset Backset 2-3/4 vs 2-3/8: How to Match the Latch to the Door Before You Drill The Half-Inch Difference That Derails a Hardware Schedule This article explains the two most common latch backset dimensions on cylindrical locksets -- 2-3/4 inch and 2-3/8 inch -- what each one means... backset commercial door hardware cylindrical locksets door hardware fundamentals hardware specification Aug 31, 2026
David Bolton Square Barrel vs. Round Barrel Hinges: When the Barrel Style Is an Architectural Decision, Not a Catalog Default Why the Barrel Shape on a Full Mortise Hinge Deserves a Line in the Spec Most commercial door hardware schedules call out hinge size, weight, material, and finish — and stop there. The barrel style (s... architectural hardware decorative hardware hardware specification hinges stainless steel hinges Aug 29, 2026
David Bolton Pull Side vs. Push Side Closer Mounting: Choosing the Right Position Before the Door Goes Up Why Mounting Position Is One of the First Closer Decisions You Make This article explains the practical differences between pull-side and push-side door closer mounting, when each position is appropri... closer mounting commercial doors door closers hardware specification parallel arm Aug 23, 2026
David Bolton Cylinder Finish Matching to a Lockset: Where the Spec Goes Wrong and How to Get It Right Why Cylinder Finish Matching Is Harder Than It Looks This article covers one of the most consistent sources of field callbacks in commercial door hardware: the cylinder finish does not match the locks... ANSI BHMA finishes commercial door hardware cylinders hardware specification lockset finishes Aug 22, 2026
David Bolton When a Standard Push Plate Won't Fit: Custom Fabrication Considerations for Complex Openings Why Some Openings Cannot Use a Stock Push Plate This article covers what drives the need for custom push plate fabrication, what specifications must be captured before ordering, and where standard pla... commercial door hardware custom hardware fabrication door protection hardware hardware specification push plates Aug 21, 2026