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716 Articles

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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...

NFPA 80 exit devices fire-rated door pairs removable mullion windstorm compliance

Sep 7, 2026 Our Blog

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...

ADA compliance ANSI A156.4 closer sizing commercial hardware door closers

Sep 6, 2026 Our Blog

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 ...

NFPA 80 annual inspection fire door hardware fire door inspection life safety compliance

Sep 6, 2026 Our Blog

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 ...

access control hardware commercial door hardware electrified mortise locks fail secure fail safe life safety code compliance

Sep 6, 2026 Our Blog

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...

bump key resistance commercial door hardware cylinder security high security cylinders key control

Sep 5, 2026 Our Blog

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...

ADA compliance cam-action closers commercial hardware door closers specification guide

Sep 5, 2026 Our Blog

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...

commercial door hardware communicating lock function exit hardware hardware schedule mortise latchset

Sep 5, 2026 Our Blog

Door Closer Spring Size by Door Width and Weight: Getting the Number Right Before You Install

Why Spring Rate Is the First Closer Decision, Not an Afterthought This article helps contractors, facility managers, and specifiers choose the correct door closer spring size based on door width and w...

ADA compliance closer sizing commercial hardware door closers spring rate

Sep 4, 2026 Our Blog

Revolving Door Hardware Basics: What Every Spec and Maintenance Team Needs to Know

What This Article Covers -- and Who It Helps Revolving doors are a common sight at hotel lobbies, hospital main entrances, corporate headquarters, and large retail facilities. They manage high foot tr...

commercial entrance hardware door seals and weatherstripping facility maintenance life safety egress revolving door hardware

Sep 4, 2026 Our Blog

Door Pull CTC: Why the Center-to-Center Dimension Is the First Decision on Any Pull Hardware Schedule

What CTC Means on a Door Pull -- and Why It Drives Everything Else This article is for contractors, facility managers, and architects who need to specify or order door pulls without sending the projec...

ADA hardware architectural hardware commercial door trim door pulls hardware specification

Sep 4, 2026 Our Blog

Office Function vs. Entrance Function Locksets: How One Wrong Code Breaks a Hardware Schedule

If you have ever received a hardware submittal back with a red-line on the lock function, there is a reasonable chance the specifier or contractor confused office function with entrance function. Thes...

commercial locksets entrance function hardware specification lockset functions office function

Sep 3, 2026 Our Blog

Reading a Sequence of Operation Diagram for Electrified Door Hardware: A Field and Spec Guide

What This Guide Covers and Who It Helps Every electrified door opening -- whether it is an access-controlled entrance at a school, a monitored corridor door in a hospital, or a secured server vestibul...

access control electrified hardware hardware specification life safety sequence of operation

Sep 3, 2026 Our Blog

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