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5 Articles

lock functions ×

Hotel Function and Double-Locking Deadbolts: What the F17 Mortise Function Actually Does at the Door

What This Article Covers and Who It Helps Hotel function locksets and double-locking deadbolts are a specific class of hardware that confuses specifiers, contractors, and facilities teams alike. If yo...

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Jul 27, 2026

When the Building Still Has Round Knobs: Replacing Legacy Cylindrical Locksets Without Losing the Door Prep

What This Article Covers and Who It Helps Older commercial buildings -- schools built before the 1990s, industrial plants, government offices, and medical clinics that have not been renovated -- are s...

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Jul 21, 2026

Apartment Entrance Function Locksets: Choosing the Right Lock for Multi-Family Building Security and Egress

What This Article Covers and Who It Helps Specifying locksets for apartment building entrances is not the same as picking a lock for an office door. Multi-family residential entrances carry overlappin...

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Jul 12, 2026

Always Locked Outside, Always Free Inside: Specifying Storeroom Function for Unattended Spaces

What This Article Covers Storeroom function is one of the most widely used institutional lock functions in commercial construction, yet it gets misapplied often enough to cause real problems at inspec...

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Jul 11, 2026

Commercial Lock Functions Explained: Mortise, Cylindrical, Deadbolts, and Outside Exit Trims

What Are Lock Functions and Why Do They Matter? A lock function describes exactly how a door behaves from both sides: who can enter, who can exit freely, and under what conditions a key or credential ...

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Apr 19, 2026