Technical Foundation
What Is a Door Stop?
A door stop is a hardware component that limits a door's swing to prevent it from striking a wall, fixture, or adjacent equipment, protecting both the door hardware and the surface it would otherwise hit. Fixed stops (floor, wall, hinge-pin, and kick-down styles) simply block the door at a set-open position, while hold-open stops — mechanical kick-down or electromagnetic — are designed to keep the door open until deliberately released, common on doors that need to stay open during normal operation.
Selection depends on door swing clearance, floor/wall surface, and whether a fire-rated door is involved — fire doors require hold-open devices that release automatically on fire alarm activation (typically electromagnetic holders tied to the fire alarm system, not simple mechanical kick-down stops), since a door required to self-close in a fire cannot be permanently wedged open. Hinge pin stops mount directly into the hinge and avoid any floor or wall penetration, useful where floor-mounted stops would create a trip hazard or wall-mounted stops aren't practical.
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| Spec | What It Means | Why It Matters |
|---|---|---|
| Mounting Style | Floor, wall, hinge-pin, overhead | Determined by door swing clearance, floor type, and whether wall/floor penetration is acceptable |
| Hold-Open Function | Fixed stop vs. mechanical or magnetic hold-open | Fire-rated doors require code-compliant automatic-release hold-open devices, not fixed stops |
| Material | Stainless steel, brass, zinc alloy, rubber | Affects durability, corrosion resistance and finish match to surrounding door hardware |
| Projection/Height | Varies by style, e.g. floor stops 1"–2.5" | Must clear the door's swing arc without creating an excessive trip hazard |
| Fire Code Compliance | UL-listed magnetic holders for fire doors | Required where the door is part of a fire-rated assembly with a self-closing requirement |
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Applications
Where Door Stops Get Used
Door stops are specified on virtually every commercial door to prevent hardware and wall damage, with hold-open variants specified where a door needs to remain open during normal use.
Commercial Office Buildings
Wall and floor-mounted door stops protecting walls and hardware on standard interior doors.
Healthcare Facilities
UL-listed magnetic hold-open devices on fire-rated corridor doors, releasing automatically on alarm.
Educational Facilities
Hinge pin and floor stops on classroom doors, avoiding trip hazards in high-traffic corridors.
Retail & Hospitality
Kick-down hold-open stops on entry doors needing to stay open during business hours.
Industrial & Warehouse Facilities
Heavy-duty floor stops protecting equipment and walls from impact by frequently used doors.
Multi-Family & Residential Construction
Standard wall and floor door stops specified across unit doors during new construction and renovation.
FAQ
Door Stops Questions, Answered
What type of door stop should I use — floor, wall, or hinge pin?
Floor stops work well where there's clear floor space at the door's stopping point and no trip-hazard concern; wall stops suit doors that swing flush against a wall; hinge pin stops avoid any floor or wall penetration, useful in high-traffic corridors or where floor stops would be a trip hazard. The right choice depends on the door's swing path and the surrounding floor/wall conditions.
Can I use a mechanical kick-down stop on a fire-rated door?
No — fire-rated doors that are required to self-close must use a hold-open device that releases automatically upon fire alarm activation, typically a UL-listed electromagnetic door holder tied into the fire alarm system. A simple mechanical kick-down stop would permanently prop the door open with no way to release it in a fire, defeating the door's fire-rating function.
What's the difference between a door stop and a door holder?
A door stop simply limits how far the door swings, protecting the wall or hardware from impact, without necessarily holding the door in place. A door holder (hold-open device) actively keeps the door in the open position until released, either mechanically (kick-down) or electromagnetically — the two terms are sometimes used loosely but describe different functions.
How do I know what projection height I need for a floor stop?
Floor stop height should be enough to engage the bottom of the door or a projecting hardware component (like a kick plate) without being so tall it becomes an unnecessary trip hazard — standard floor stops commonly range from about 1" to 2.5". Consider the door's clearance and swing arc when selecting projection height.
What material should I choose to match my door hardware?
Match the door stop's finish to the surrounding door hardware (hinges, locksets, kick plates) for a consistent appearance — common options include stainless steel, brass, and zinc alloy in various plated finishes. Beyond appearance, stainless steel offers the best corrosion resistance for exterior or high-humidity locations.
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