David Bolton Closer Torque Rating vs. Door Inertia: Why the Physics of Your Opening Determines the Right Closer Size What This Article Covers -- and Who It Helps When a closer fails to latch a heavy corridor door or slams shut faster than it should, the instinct is to blame the spring adjustment. The real cause is u... ADA compliance ANSI A156.4 closer sizing commercial hardware door closers Sep 6, 2026
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
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
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 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
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
David Bolton Heavy Weight vs. Standard Weight Hinges on Fire-Rated Doors: Why the Wrong Choice Fails the Annual Inspection What This Article Covers and Who It Helps This guide is for commercial contractors, facility managers, and architects who specify or maintain hinges on fire-rated door assemblies. It focuses on a spec... NFPA 80 commercial hardware fire-rated doors hinges inspection compliance Aug 13, 2026
David Bolton Access Panel Hinge Selection: Matching the Right Configuration to the Opening Type What Is an Access Panel Hinge and Why Does the Configuration Matter? An access panel hinge is a hinge used to hang lightweight inspection or utility panels — in ceilings, walls, mechanical enclosures,... access panels commercial hardware facility maintenance hardware selection hinges Jul 30, 2026
David Bolton When a Deadbolt Is the Right Answer: Specifying Auxiliary Locks for Commercial Doors That Do Not Need a Latchbolt What This Article Covers and Who It Helps Not every commercial door needs a cylindrical lockset with a latchbolt. In a surprising number of situations -- electrical rooms, pipe chases, storage closets... auxiliary locks code compliance commercial hardware deadbolts hardware specification Jul 16, 2026
David Bolton Door Stops That Get Skipped Until the Wall Gets Hit: Choosing the Right Floor and Base Stop for the Job The Stop That Nobody Specifies Until the Drywall Gets a Handle-Shaped Hole Door stops and holders are among the most overlooked items on a hardware schedule. They ship last, get installed last, and ge... Rockwood commercial hardware door holders door stops floor stop Jun 13, 2026
David Bolton Commercial Door Pull Finish Selection: Why the Hardware Schedule Gets Locked In Before the Finish Lead Time Is Checked The Finish Decision That Looks Simple Until the Job Is Already Behind This article is for commercial contractors, facility managers, and project architects who specify or purchase door pull hardware. ... architectural door trim commercial hardware door pulls finish selection project scheduling Jun 1, 2026
David Bolton Why a 3-Knuckle Heavy-Weight Hinge Gets Specified on Doors That Already Have a 5-Knuckle on the Schedule The Question Nobody Asks Until the Hardware Schedule Is Already Submitted This article is for contractors, hardware consultants, and facility managers who have received a submittal or hardware set sho... commercial hardware door hinges full mortise hinges hardware specification heavy weight hinges May 31, 2026
