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8 Articles

automatic door bottoms ×

Fire-Rated and Acoustic Automatic Door Bottoms: When One Opening Has to Meet Two Separate Standards at Once

When Sound Control and Fire Ratings Collide at the Same Door This article is for contractors, facility managers, and specifiers who encounter openings that must satisfy both a fire-rating requirement ...

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Apr 23, 2026

Fire-Rated Auto Door Bottoms: Why the 3/4-Inch Drop Spec Is a Code Decision, Not a Catalog Choice

What This Article Covers This guide is for commercial contractors, facility managers, and specifiers who are selecting or replacing an automatic door bottom on a fire-rated opening. Specifically, it a...

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Apr 23, 2026

Fire-Rated Automatic Door Bottoms: What Makes a Drop Seal Code-Compliant on a Labeled Opening

Why the Fire Rating on an Automatic Door Bottom Actually Matters This guide is for contractors, facility managers, and specifiers who need to understand the compliance difference between a standard au...

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Apr 23, 2026

Full Surface vs. Semi-Mortised Automatic Door Bottoms: Picking the Right Mount for Your Opening

What This Article Covers and Who It Helps Automatic door bottoms are specified across nearly every commercial building type — schools, healthcare facilities, office buildings, and industrial plants — ...

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Apr 23, 2026

Automatic Door Bottoms: Choosing the Right Drop Seal for Sound, Smoke, and Weather Control

What This Guide Covers Automatic door bottoms are one of the most specified yet least understood items on a hardware schedule. Whether you are sealing a conference room for acoustic privacy, maintaini...

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Apr 23, 2026

Fire-Rated Automatic Door Bottoms: How to Specify and Install Them Right

Why the Gap at the Bottom of a Fire Door Matters More Than You Think The space beneath a fire door is one of the most overlooked details in door assembly compliance. Too much clearance and you fail an...

NFPA 80 compliance automatic door bottoms commercial door seals door gasketing fire door hardware

Apr 22, 2026

Fire-Rated and Acoustic Automatic Door Bottoms: A Specifier's Guide to Getting the Assembly Right

What This Guide Covers Automatic door bottoms that carry both a fire rating and an acoustic (sound attenuation) rating occupy a narrow but critical position in commercial hardware scheduling. Specifyi...

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Apr 22, 2026

Full Mortised Auto Door Bottoms: Specifying and Installing the Right Drop Seal for Commercial Openings

Why the Door Bottom Is the Most Overlooked Seal in the Assembly When architects and contractors detail a door opening, the perimeter gasketing and threshold typically receive careful attention. The au...

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Apr 22, 2026