Maglock vs. Electric Strike: Which Door Release Belongs on Your NYC Building?

For most NYC building entrances, an electric strike is the safer default: it locks the door from the outside while leaving the inside handle working exactly as it always did, so egress never depends on electronics. A maglock is the right tool when the door can't take a strike — glass storefront doors with narrow aluminum frames, doors with badly worn frames, or openings where you need holding force across the whole door — but it comes with strict NYC fire-code obligations, because a maglock physically holds the door shut in both directions until power is cut.

That's the entire decision in miniature: a strike modifies how the door locks; a maglock adds a new lock that didn't exist before. Everything else — fail-safe versus fail-secure, request-to-exit devices, fire alarm tie-ins — follows from that difference. If someone quotes you a maglock on a door that could take a strike, ask why, because they may just be avoiding the frame work.

Fail-safe hardware unlocks when power is lost. Fail-secure hardware stays locked when power is lost. Maglocks are inherently fail-safe — they're electromagnets, so no power means no magnetism means an unlocked door. Electric strikes come in both flavors, and the choice is made at ordering time: a fail-secure strike keeps the door latched during an outage (people inside still exit freely through the mechanical handle), while a fail-safe strike releases.

In New York, blackouts are not hypothetical — every building owner who was here for a summer grid event knows this. A building entrance on a fail-secure strike stays locked to the street during an outage, which is usually what an owner wants. The same building on a maglock has an unlocked front door until power returns, unless the maglock has battery backup — and battery backup on a maglock has to be designed carefully, because the fire-safety logic described below must still cut power to the lock even when the batteries are the thing supplying it.

This is also why the two get combined with different hardware. Fail-safe locking is what you want on certain interior doors — like a stairwell re-entry door that must open when the fire alarm sounds — while fail-secure is the norm for perimeter security. A good access-control design mixes both deliberately rather than defaulting one type everywhere.

New York City building and fire codes treat a maglock as what it is: a device that can hold a person inside a building. So a maglock on a door in a path of egress must release automatically when the building's fire alarm activates, must release on power failure, and must be releasable by the occupant without any special knowledge — which in practice means motion-sensor release, a push-to-exit button, or exit hardware that cuts lock power directly, arranged per the code section your specific door falls under. If your building has a fire alarm system, the maglock gets tied into it. That tie-in is real wiring to the fire alarm panel, not a suggestion.

Electric strikes mostly sidestep this because the inside handle still retracts the latch mechanically — the strike never restrains anyone trying to leave. That's the deep reason strikes are the default answer for so many NYC doors: the egress analysis is simple. With a maglock, every inspection — FDNY, insurance, a buyer's engineer during a sale — will look at the release logic, and a maglock installed without proper egress release is the kind of violation that gets a system red-tagged. If you're inheriting a building with existing maglocks, having the release chain verified (alarm drop, motion sensor, exit button, power-loss behavior) is a cheap check against an expensive problem.

REX means request-to-exit — the device that tells the access system 'someone is leaving, let them.' On a maglock door it is not optional equipment; it is the thing that makes the door legal and livable. The common setup is a passive-infrared motion sensor above the inside of the door that drops the lock as a person approaches, backed up by a labeled push-to-exit button that cuts lock power directly through its own contacts. The button is the belt-and-suspenders: even if the access controller crashes, pressing it physically interrupts power to the magnet.

On an electric strike door, a REX device usually plays a quieter role: it tells the system the door is about to open legitimately, so the door-position sensor doesn't log a forced-door alarm every time someone walks out. Same name, much lower stakes. When you're comparing access-control proposals, look at how the REX is specified. A maglock quote with no motion sensor and no exit button is incomplete, and a proposal that treats REX as an add-on line item to trim from a maglock door is a proposal to make your building noncompliant.

Narrow-stile aluminum storefront doors — the glass doors on most NYC retail and many lobby entrances — are the classic maglock candidate. The vertical frame member is often too narrow to house a standard strike, and the door usually swings against an aluminum frame with little meat to cut into. A surface-mounted maglock on the header, with the armature plate on the door, needs no frame cutting at all. There are electrified solutions built for narrow stiles too, but on many storefront doors the maglock is genuinely the practical answer — which is fine, as long as the egress release is done right.

Hollow metal doors in hollow metal frames — the standard for building service entrances, side doors, and commercial interiors — are ideal strike territory. The frame can be cut and reinforced for a heavy-duty strike matched to the existing lockset, and the result is a door that locks electronically outside and works mechanically inside. One critical caveat: if the door is a fire-rated door, the strike must carry a fire rating too, and the frame modification has to preserve the door assembly's listing. Wood doors and frames, common in older office buildings and brownstone interiors, also take strikes well, though soft or split frames sometimes need reinforcement first — and a frame too rotten to hold a strike is telling you the frame, not the lock, is the real project.

Choose an electric strike when the door and frame can accept one, when free mechanical egress should be preserved untouched, when you want the door to stay locked during a power failure, and when you'd rather keep the fire-alarm interface simple. That covers most hollow metal and wood doors in NYC buildings — service entrances, package rooms, basement doors, office suites, and plenty of lobby doors.

Choose a maglock when the door physically can't take a strike (narrow-stile storefront glass being the leading case), when the frame is too far gone for a clean strike install, when you need strong holding force on a large or flexing door, or when the design intentionally calls for fail-safe behavior. Accept the obligations that come with it: fire alarm tie-in, motion-sensor REX, exit button, and periodic testing of the release chain.

Plenty of buildings correctly end up with both — a maglock on the glass front door and strikes everywhere else. If you're weighing this for a specific door, the useful next step is a hardware survey of the actual opening, not a phone-call guess. Downtown Door Repair & Security installs and services both, licensed by NYC DCWP (#2109597), with offices at 170 Hicks Street in Brooklyn Heights and 232 Leonard Street in Williamsburg, and we work across the five boroughs around the clock.