David Bolton Bump Keys and Your Door Cylinders: What the Attack Looks Like and How Hardware Spec Stops It What This Article Covers and Who It Helps Bump keying is one of the fastest ways an unauthorized person can open a standard pin-tumbler lock without leaving visible evidence of forced entry. This guid... bump key resistance commercial door hardware cylinder security high security cylinders key control Sep 5, 2026 Our Blog
David Bolton Cam-Action vs. Rack-and-Pinion Door Closers: Which Mechanism Belongs on Your Opening? Two Mechanisms, One Job -- But Very Different Results This article explains the mechanical difference between cam-action and rack-and-pinion door closers, when each design has the advantage, and how t... ADA compliance cam-action closers commercial hardware door closers specification guide Sep 5, 2026 Our Blog
David Bolton Exit vs. Communicating: How the Mortise Latchset Function Shapes the Entire Opening Schedule Why the Function Label on a Mortise Latchset Is Not Just a Catalog Detail This guide is for contractors, hardware specifiers, and facility managers who are building or reviewing a door hardware schedu... commercial door hardware communicating lock function exit hardware hardware schedule mortise latchset Sep 5, 2026 Our Blog
David Bolton Door Closer Spring Size by Door Width and Weight: Getting the Number Right Before You Install Why Spring Rate Is the First Closer Decision, Not an Afterthought This article helps contractors, facility managers, and specifiers choose the correct door closer spring size based on door width and w... ADA compliance closer sizing commercial hardware door closers spring rate Sep 4, 2026 Our Blog
David Bolton Revolving Door Hardware Basics: What Every Spec and Maintenance Team Needs to Know What This Article Covers -- and Who It Helps Revolving doors are a common sight at hotel lobbies, hospital main entrances, corporate headquarters, and large retail facilities. They manage high foot tr... commercial entrance hardware door seals and weatherstripping facility maintenance life safety egress revolving door hardware Sep 4, 2026 Our Blog
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 Our Blog
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 Our Blog
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 Our Blog
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 Our Blog
David Bolton Fastener Failure at the Frame: Why Screw Type Matters More Than Torque on Hollow Metal Hinge Installations This article is for commercial subcontractors, facility maintenance staff, and hardware specifiers who work with hollow metal frames and want to understand why the wrong hinge fastener -- even one tha... commercial hardware fasteners hinges hollow metal frames installation Sep 2, 2026 Our Blog
David Bolton When the HVAC Changes, Your Door Closers Need a Second Look Why a New HVAC System Can Make a Perfectly Good Closer Fail This article is for facility managers, mechanical contractors, and building engineers who have noticed that doors are slamming, not latching... HVAC and door hardware closer adjustment door closers facility maintenance fire door compliance Sep 2, 2026 Our Blog
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 Our Blog
