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
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 Our Blog
David Bolton Frame Strike Preparation: What the Hollow Metal Frame Has to Be Ready For Before Hardware Ships Why Frame Strike Preparation Is a Decision, Not a Default This article is for commercial contractors, door frame suppliers, and facility managers who need to understand how strike preparations are spe... ANSI strike prep door hardware specification electric strike installation frame strike preparation hollow metal frames Sep 1, 2026 Our Blog
David Bolton Hinge Shimming in the Field: How to Fix Door Alignment Without Pulling the Hardware When the Door Is Hung but Not Right: A Field Alignment Problem Every Installer Knows This guide is for commercial contractors, school and facility maintenance staff, and anyone responsible for keeping... commercial hardware door alignment field installation hinges hollow metal doors Sep 1, 2026 Our Blog
