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632 Articles

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Hollow Metal Frames and Thermal Break Seals: What the Opening Actually Needs to Stop Heat Loss

Why the Frame Is Usually Where Exterior Energy Loss Starts This article is for contractors, facility managers, and specifiers who are troubleshooting condensation, frost on interior frame faces, or fa...

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Sep 8, 2026

Cremone Bolts on Storefront Doors: What They Are, Where They Fit, and What to Use Instead

What This Article Covers This guide explains what a cremone bolt is, why it comes up on storefront door projects, and why it almost never belongs on a true commercial storefront opening. It also walks...

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Sep 8, 2026

Privacy Mortise vs. Privacy Cylindrical: The Field Decision That Happens After the Door Is Already Hung

The Problem Arrives After Move-In, Not During Spec This article is for facility managers, maintenance contractors, and subs who are staring at a door that already has a privacy lock installed and need...

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Sep 8, 2026

RFID Credential Standards for Commercial Door Access: What 125 kHz vs. 13.56 MHz Means for Your Opening Spec

What This Article Covers and Who It Helps If you are specifying electrified locks, access-control readers, or credential hardware for a commercial opening, the RFID standard your credential uses deter...

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Sep 7, 2026

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...

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Sep 7, 2026

The Keyed Removable Mullion on a Fire-Rated Pair: Why This One Component Shapes the Entire Opening Spec

What This Article Covers This guide is written for commercial contractors, hardware specifiers, and facility managers who are configuring a fire-rated door pair and trying to understand how a keyed re...

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Sep 7, 2026

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...

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Sep 6, 2026

NFPA 80 Fire Door Inspection: The 13-Point Annual Checklist Every Facility Needs

What This Article Covers -- and Who It Helps NFPA 80, Standard for Fire Doors and Other Opening Protectives , requires that every fire door assembly be inspected and tested annually. This guide walks ...

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Sep 6, 2026

Fail Secure vs. Fail Safe on an Electrified Mortise Lock: How the Wrong Choice Creates a Code Problem

What This Article Covers and Who It Helps When an electrified mortise lockset shows up on a hardware schedule, one of the first decisions is deceptively simple-looking: fail secure or fail safe? That ...

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Sep 6, 2026

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...

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Sep 5, 2026

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...

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Sep 5, 2026

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...

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Sep 5, 2026

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