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Door Closer Spring Size by Door Width and Weight: Getting the Number Right Before You Install

Silicone Bulb Gasketing on Fire Doors: Why Material Choice Determines Whether the Seal Survives the Test

What This Article Covers and Who It Helps This guide explains how silicone bulb gasketing works on fire-rated door assemblies, why the material matters for long-term seal integrity, and what the listi...

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Jul 29, 2026 Our Blog

Upgrading a Heavy-Duty Door to an Electrified Hinge: What the Mortar Guard and Wire Passage Actually Require

What This Article Covers and Who It Helps When a facility manager or contractor decides to add card-reader access control to an existing heavy commercial door, one of the least-discussed upgrade paths...

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Jul 29, 2026 Our Blog

Frame Head Reinforcing on Hollow Metal Frames: What Gets Missed Before the Hardware Goes In

What This Article Covers and Who It Helps Frame head reinforcing is one of those line items on a hardware schedule that looks minor until a closer arm pulls out of an underbuilt header, or an inspecto...

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Jul 28, 2026 Our Blog

Electric Latch Retraction on Exit Devices: How Access Control Unlocks the Door Without Touching the Bar

What This Article Covers and Who It Helps If you are specifying or installing an access-controlled opening that also requires panic hardware, electric latch retraction (ELR) is the mechanism that ties...

access control electric latch retraction electrified hardware exit devices fire-rated hardware

Jul 28, 2026 Our Blog

Hold-Back Function on a Mortise Lockset: When Latching Is the Problem, Not the Solution

What This Article Covers This guide is for contractors, facility managers, and architects who encounter the hold-back function on a mortise lockset and need to understand what it does mechanically, wh...

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Jul 28, 2026 Our Blog

Getting the Closer Right for ADA: Opening Force, Sweep Time, and the Adjustments That Actually Matter

What This Guide Covers and Who It Is For ADA closer compliance is not a product decision -- it is an adjustment decision. A Grade 1 closer installed on the wrong setting can fail the 5-pound opening-f...

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Jul 27, 2026 Our Blog

Hotel Function and Double-Locking Deadbolts: What the F17 Mortise Function Actually Does at the Door

What This Article Covers and Who It Helps Hotel function locksets and double-locking deadbolts are a specific class of hardware that confuses specifiers, contractors, and facilities teams alike. If yo...

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Jul 27, 2026 Our Blog

Residential Weight Butt Hinges on Light Commercial Doors: Where the Grade Line Gets Crossed

What This Article Covers and Who It Helps This guide is for facilities managers, commercial subcontractors, and architects who have encountered a door that looks fine on paper but starts failing withi...

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Jul 27, 2026 Our Blog

Exit Device Prep on Hollow Metal Doors: What Gets Cut Wrong Before the Device Ever Ships

Why Door Prep Is the Decision That Happens First -- and Hurts Last This article is for commercial subcontractors, door and hardware suppliers, and facility project managers who specify or install exit...

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Jul 26, 2026 Our Blog

Delayed Action on a Door Closer: The Accessibility Feature Nobody Adjusts Correctly

What Is Delayed Action on a Door Closer? Delayed action is a hydraulic closer feature that holds the door open momentarily after it reaches a set angle -- typically somewhere in the range of 70 to 90 ...

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Jul 26, 2026 Our Blog

Concealed Leaf Continuous Hinges: What the Hidden Leaf Actually Changes on the Job Site

What This Guide Covers and Who It Is For Concealed leaf continuous geared hinges are specified on commercial openings where aesthetics, security, or sightline requirements push the hardware as close t...

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Jul 26, 2026 Our Blog

UL 10C Positive Pressure Fire Testing: What the Label on Your Door Actually Certifies

What This Article Covers and Who It Helps If you specify, install, inspect, or maintain fire-rated door assemblies, you have almost certainly seen the UL 10C designation on a door label or a hardware ...

NFPA 80 UL 10C fire door compliance fire-rated hardware positive pressure testing

Jul 25, 2026 Our Blog

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