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What CSI MasterFormat Section 087100 Actually Controls (And Where Hardware Specs Break Down)

What This Article Covers and Who It Helps If you are writing, reviewing, or bidding a project with a door hardware specification, the section number on the cover sheet is almost certainly 087100 — Doo...

087100 CSI MasterFormat commercial construction door hardware specification writing

Aug 14, 2026 Our Blog

Half Surface Swing Clear Hinges on Hollow Metal Doors: When You Cannot Mortise the Door

The Problem No One Talks About Until the Door Is Already Hung This article is for contractors, facility managers, and architects who face a specific field condition: a hollow metal door that needs swi...

ADA door hardware half surface hinges hinge selection hollow metal door hardware swing clear hinges

Aug 14, 2026 Our Blog

Floor Closers on Double-Acting Doors: What Changes When the Door Swings Both Ways

The Problem With Putting a Standard Closer on a Double-Acting Door This article explains how door closers work differently on double-acting openings, which closer types are appropriate, and what speci...

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Aug 13, 2026 Our Blog

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 Our Blog

Drill Attacks on Door Cylinders: What Protection Options Actually Work and When to Specify Them

Why Cylinder Drilling Is a Real Threat on Commercial Openings A drill attack on a pin-tumbler cylinder is one of the fastest and most common forced-entry methods on commercial and institutional doors....

UL437 commercial-door-hardware cylinder-guards cylinders high-security

Aug 12, 2026 Our Blog

The Hold-Back Function on a Mortise Lock: Why Getting the Trim Package Wrong Costs You a Second Trip

What This Article Covers and Who It Helps A hold-back mortise lockset sounds straightforward: turn the inside lever or thumb piece, the latch retracts and stays retracted until you release it. But the...

Grade 1 locks commercial door hardware hold-back function installation tips mortise locksets

Aug 12, 2026 Our Blog

No Knuckles, No Gaps: How Concealed Hinges Work on Flush Wood Doors

What This Article Covers Concealed hinges -- sometimes called invisible hinges or European-style hinges -- are fully mortised into both the door edge and the frame so that no knuckle, barrel, or pin i...

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Aug 11, 2026 Our Blog

Mortise Lock Hold-Back Trim Choices That Kill the Installation: Wide Escutcheon vs. Sectional and Why It Matters Before You Cut the Door

Why Trim Style on a Hold-Back Mortise Lock Deserves More Attention Than It Gets This article is for commercial contractors, facility managers, and hardware specifiers who are selecting or replacing a ...

Grade 1 locks commercial door hardware escutcheon trim hold-back function mortise locksets

Aug 11, 2026 Our Blog

Overhead Door Holders in Industrial Facilities: Matching the Right Device to the Load, Cycle, and Opening

The Problem Nobody Talks About Until the Door Destroys the Wall This article is for facility managers, commercial hardware specifiers, and industrial maintenance teams who need to match an overhead do...

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Aug 9, 2026 Our Blog

The Wiring Harness Is the Weakest Link: Troubleshooting Electrified Exit Devices Before You Replace the Whole Unit

Why the Harness Gets Overlooked Until It Costs You a Full Device This article is for facility maintenance technicians, commercial hardware contractors, and access control integrators who are troublesh...

access control hardware electrified exit devices exit device maintenance life safety hardware wiring harness

Aug 9, 2026 Our Blog

Adding Card Access to an Existing Mortise Lock: What Actually Has to Change at the Door

What This Article Covers and Who It Helps Facility managers, security integrators, and commercial hardware specifiers frequently face the same challenge: a building already has solid-performing mortis...

access control credential readers electrified hardware mortise locks retrofit

Aug 8, 2026 Our Blog

Grade 2 Passage Latchsets on Fire-Rated Openings: Where the Spec Gets Quietly Wrong

When a Passage Latchset Ends Up on a Fire Door A passage latchset looks simple: no key, no thumbturn, just a lever that retracts a latch. But once that latchset goes on a fire-rated opening, the conve...

NFPA 80 UL 10C compliance door schedule specification fire-rated door hardware passage latchsets

Aug 8, 2026 Our Blog

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