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Our Blog

Getting the Sequence Right: How to Select a Door Coordinator for Closer Pairs

Why Closer Pairs Need a Coordinator If you have ever watched the active leaf of a double door slam shut before the inactive leaf had a chance to clear the astragal, you already understand the problem ...

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Oct 22, 2026 Our Blog

Fire Alarm Dropout for Magnetic Hold-Opens: What Every Specifier and Installer Needs to Get Right

What Is Fire Alarm Dropout and Why Does It Matter on Hold-Open Doors? This article explains how fire alarm dropout works with electromagnetic hold-open devices, which code requirements govern the inte...

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Oct 22, 2026 Our Blog

Double Cylinder Deadbolt on a Fail Safe Electrified Mortise Lock: Why the Wiring Sequence Has to Come Before the Key Schedule

What This Article Covers A fail safe electrified mortise lock with a double cylinder deadbolt is a more layered opening than most contractors expect on first encounter. The electrical behavior at powe...

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Oct 22, 2026 Our Blog

Maison Keying for Apartment Buildings: One Key for Common Areas, One Key for Home

What This Article Covers and Who It Helps If you manage a residential apartment building, are a contractor bidding a multi-family project, or are an architect writing a hardware schedule for a new mid...

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Oct 21, 2026 Our Blog

Why Your Commercial Door Is Dropping at the Latch: Diagnosing and Fixing Hinge Sag

What Is Hinge Sag, and Why Does It Matter? Hinge sag is the gradual downward drift of a door's latch edge caused by failure or fatigue in one or more of the hinges supporting it. On a commercial openi...

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Oct 21, 2026 Our Blog

One Lock Case, Three Different Jobs: How Mortise Lock Function Codes Sort Out Apartment, Exit Corridor, and Public Restroom Doors

Why the Same Lock Case Shows Up on Three Very Different Doors This article is for contractors, facility managers, and specifiers who keep running into a deceptively simple question on mixed-use and mu...

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Oct 21, 2026 Our Blog

Picking the Right Astragal for a Non-Rated Door Pair: What the Opening Actually Demands

What This Article Covers -- and Who It Helps When two door leaves meet at the center of an opening without a center mullion, something has to close that gap. On a non-fire-rated pair, you have more fl...

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Oct 20, 2026 Our Blog

Why the Gap Around Your Fire Corridor Door Is a Smoke Problem, Not Just a Draft

The Gap You Can See Is the Gap Smoke Travels Through This article explains how smoke seals work on fire-rated corridor doors, who needs to care about them (facility managers, healthcare construction t...

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Oct 17, 2026

Great Grand Master Keying Explained: When Your Facility Outgrows a Three-Level Key System

What This Article Covers and Who It Helps A great grand master key (GGMK) system is the most complex key hierarchy used in commercial and institutional buildings. If you manage a university campus, a ...

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Oct 17, 2026

Restroom Accessory Rough-In on Renovation Jobs: Why the Wall Cavity Decides Everything Before You Order

The Unit Is Ordered. Now Someone Has to Open the Wall. This article is for contractors, facility managers, and project managers handling restroom renovations or tenant improvement work where an automa...

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Oct 17, 2026

Fail Safe vs. Fail Secure Is Only Half the Question: How Wiring Mode Shapes the Entire Access Control Sequence on a Mortise Lock Opening

The Decision That Happens After the Spec Is Written This article is for electrical contractors, low-voltage integrators, and facility managers who are past the point of choosing a fail safe electrifie...

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Oct 17, 2026

Insulated Access Panels at HVAC Chases: Picking the Right Door for the Thermal Envelope

Why the Access Panel at an HVAC Chase Is Not a Generic Opening This article helps contractors, facility managers, and mechanical coordinators choose and specify insulated access panels where HVAC chas...

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Oct 16, 2026

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