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22 Articles

NFPA 80 × ×

Fire-Rated Cylindrical Locksets: What the UL Listing Actually Requires at the Opening Level

Why the Lock Label Alone Does Not Make the Opening Fire-Rated This article is for facility managers, commercial contractors, and architects who specify or maintain doors with cylindrical locksets on f...

Grade 1 hardware NFPA 80 UL fire rating cylindrical locksets fire door compliance

Jul 31, 2026

Why a Passage Latchset Fails the Fire Door Inspection: The Four Gaps Most Facilities Miss

What This Article Covers and Who It Helps A Grade 1 passage latchset looks identical on both sides of a corridor door whether it carries a UL fire label or not. That visual similarity is exactly why p...

NFPA 80 cylindrical locks fire door compliance life safety hardware passage latchsets

Jul 30, 2026

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

Fire-Rated Brush Sweeps on a Door Schedule: What the UL Listing Actually Limits by Door Type

Why the Brush Sweep Line Item on Your Hardware Schedule Is Not a Universal Pick This article is for project managers, commercial door installers, and specifiers who have a fire-rated opening on their ...

NFPA 80 UL listings brush gasketing door sweeps fire-rated hardware

Jul 21, 2026

Spring Hinge Combination Tables: Why the Count You Picked on Paper Fails When the Door Hits the Frame

The Problem Nobody Catches Until the Inspector Does A door swings open and stays there. Or it slams before the latch can catch. Or the inspector notes that the fire-rated assembly is not self-closing ...

NFPA 80 commercial hinges fire door compliance self-closing hardware spring hinges

Jul 16, 2026

Spring Hinge Count on Fire-Rated Commercial Doors: How the Combination Table Gets Ignored Until the Inspector Arrives

Why Spring Hinge Quantity on a Fire-Rated Door Is Not a Guess This article is for commercial contractors, facility managers, and project architects who specify or install self-closing hardware on fire...

NFPA 80 fire-rated door hardware hinge combination table self-closing hinges spring hinges

Jul 4, 2026

The Floor Strike Mount Decision on a Vertical Rod Exit Device: Saddle vs. Flush Before the Concrete Is Poured

Why the Floor Strike Mount Decision Has to Happen Before the Slab Is Done This article is for contractors, facility managers, and specifying architects who are coordinating vertical rod exit device ha...

NFPA 80 exit devices fire-rated hardware floor strike vertical rod

Jun 28, 2026

Steel Flat Bar Astragals on Fire-Rated Door Pairs: Why the Meeting Stile Gap Gets Missed Until the Inspector Walks the Job

The Problem That Shows Up at the Wrong Time The door pair is hung, the exit devices are set, the closer is adjusted, and the hardware contractor is ready to hand off the opening. Then the authority ha...

NFPA 80 astragals commercial door hardware fire-rated door pairs seals and sweeps

Jun 19, 2026

ADA Offset Interlocking Thresholds: What Changes When the Floor Transition Happens Inside a Fire-Rated Opening

When an ADA Ramp Threshold Meets a Fire-Rated Door: What Actually Changes This article is for facility managers, commercial contractors, and specifiers who are selecting or replacing an ADA offset int...

ADA thresholds NFPA 80 accessibility compliance fire-rated door hardware interlocking ramp threshold

Jun 2, 2026

Fire-Rated Perimeter Weatherstrip on Steel Doors: Why the UL10C Listing Gets Overlooked Until the Door Fails Inspection

Why Perimeter Weatherstrip Fails the Fire Door Inspection — and Nobody Noticed Until the End This article is for commercial contractors, facility managers, and project architects who are specifying or...

NFPA 80 UL10C fire-rated doors perimeter seals weatherstrip

May 25, 2026

Fail-Secure Electric Strikes on Fire-Rated Doors: What the Monitoring Outputs Actually Tell You

What This Article Covers This guide is for contractors, security integrators, and facility managers who specify or install fail-secure electric strikes on fire-rated openings. Specifically, it address...

NFPA 80 access control electric strikes fire-rated openings latchbolt monitoring

May 24, 2026

Spring Hinges Without a Closer: Where the Self-Closing Requirement Meets a Real-World Size Limit

What This Article Covers Spring hinges are specified on fire-rated and non-rated doors when a self-closing function is required but a hydraulic door closer is not practical or budgeted. This guide is ...

NFPA 80 door hardware specification fire door hardware self-closing doors spring hinges

May 11, 2026

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