A push bar that no longer latches puts a business owner or property manager in an awkward position that most residential lock problems never create. The door still opens, so nobody is trapped, and the natural instinct is to treat it as a security nuisance to handle when convenient. But an exit device is not just a lock. It is a piece of life-safety equipment that the building code requires on that door, that the fire marshal inspects, and that your insurer assumes is working. When it stops latching, the building is out of compliance, and the wrong temporary fix, a chain, a wedge, an added deadbolt, converts a maintenance item into the single most dangerous condition a commercial building can have. This page is written for the person responsible for that door, and it is organized around what the failure means rather than just how it happens.
What the code expects from that door
Exit devices, often called panic bars or crash bars, exist because of fires in which people died against doors that would not open under crowd pressure. The building and fire codes that came out of those events require that doors serving certain occupancies unlatch with a single push on a bar that spans most of the door width, with no key, no tool, no special knowledge, and no more than a modest amount of force. The device has to be listed for the purpose, installed as the manufacturer directs, and kept in working order. Manufacturers such as Von Duprin, Sargent, Detex, Dorma, and Yale build devices to those listings, and the listing is what an inspector is checking when the paperwork asks whether the hardware is compliant.
The same codes have a second requirement that is the heart of this page. A door in a fire rated assembly, the kind separating a stairwell from a corridor, a tenant space from a common hallway, or a garage from an occupied floor, must be self-closing and must latch positively every time it closes. The latch is what holds the door shut against the pressure of a fire so the rated assembly can do its job. A fire door with an exit device that does not latch is, in the code’s view, not a fire door at all. It is an opening in a fire wall.
So the question of which door you are dealing with comes first. On a non-rated exterior exit door, a push bar that fails to latch is a security and compliance problem. On a fire rated door, it is a violation of the assembly itself, and it carries more weight at inspection.
Fire exit hardware and panic hardware are not the same device
Two families of exit devices look identical from across a room and are treated very differently by code. Panic hardware is listed for use on doors that need panic egress but are not part of a fire rated assembly. Fire exit hardware is listed for use on fire rated doors and carries a label, usually on the end cap or the device body, saying so. The two differ in one feature that matters enormously to a latching problem: dogging.
Dogging is the ability to hold the latch retracted so the door swings free in both directions, which a business uses during open hours so customers can walk in without the door being locked. Panic hardware usually has a dogging feature, engaged with a small hex key or, on some models, a key cylinder. Fire exit hardware is not permitted to have mechanical dogging, because a fire door must be able to latch at every moment, whether or not anyone remembers to undog it. Some fire exit devices offer electric dogging that releases on fire alarm, but never a manual hold.
This distinction produces one of the most common causes of a push bar that will not latch, and it is not a mechanical failure at all. Somebody dogged the device and forgot. On panic hardware that is an operational issue with no code consequence. On a rated door where someone has installed panic hardware and then dogged it, it is a compliance failure twice over: the wrong device on a rated door and a rated door held open. Property managers who inherit a building should check the label on every exit device on every rated door, because substitutions by previous owners are common.
What a non-latching door means for egress
Egress is usually preserved when the latch fails, since a push bar that does not latch still opens. The life-safety risk comes from what people do about it. An exterior door that will not secure gets chained, padlocked, wedged, or fitted with a surface bolt on the inside by a manager who needs the building locked tonight. Every one of those creates a door that does not open with a single push, which is exactly the condition the code exists to prevent. An interior fire door that will not latch gets propped, and a propped fire door is an open hole in a fire barrier.
The liability arithmetic is worth stating plainly. A business that is burgled through an exit door that failed to latch has a loss and an argument with its insurer about maintenance. A business in which someone is injured or killed because an exit door was chained shut has a criminal and civil problem of a completely different scale, and the fact that the chain was a temporary fix for a broken latch will not help. The rule for any responsible person is simple: an exit door may be repaired, guarded, or watched, but it may never be secured with anything that defeats the push bar, not for one night.
What it means at inspection
Fire marshals inspect commercial buildings on a schedule that depends on occupancy, and exit doors are on every checklist. The inspector pushes the bar and watches the door close. On a fire door they watch for positive latching without assistance, meaning the closer brings the door to the frame and the latch bolt drops into the strike on its own. A door that needs a pull to latch fails, and so does one that latches only when pushed hard. A device that has been dogged on a fire door fails, and a device without a fire exit hardware label on a rated door fails regardless of whether it latches.
Fire door assemblies are also subject to periodic inspection and documentation requirements, and the property owner is expected to keep records. A latch that has been failing for months, with no record of repair, reads differently to an inspector and an insurer than a latch that failed last week and has a work order attached. Documentation is not a formality. It is the difference between a maintenance item and a pattern of neglect.
The causes, arranged by what an inspector would write up
The inspector’s finding is either that the door does not close, that the door closes but does not latch, or that the device has been altered. Each finding points to a different set of mechanical causes.
If the door does not close fully on its own, the door closer is the first suspect, and the exit device is not the problem yet. A closer with a failed latch speed valve, a lost arm adjustment, or fluid loss will bring the door to within a few inches of the frame and stop, and the latch bolt never reaches the strike. Wind pressure on an exterior door, building pressure pushing the door outward, or a new weatherstrip dragging on the threshold can all stop a marginal closer short. The page on a door closer slamming too hard covers closer adjustment in detail, because on a commercial door the closer and the latch are one system, and half of all latching complaints on exit devices are closer complaints.
If the door closes fully and the latch bolt does not enter the strike, the problem is alignment between bolt and strike, and the cause depends on the kind of device. A rim device has a single latch bolt on the push side that engages a surface mounted strike on the frame or the inactive leaf. The strike loosens, the screws strip, the door sags on worn hinges or pivots, and the bolt lands on the strike lip instead of in the pocket. The bright wear mark on the strike shows where the bolt has been landing. A vertical rod device, with latches at the top of the door and often at the bottom, is more sensitive. The rods stretch or their adjustment nuts back off, the top latch does not reach the top strike, the bottom bolt hits debris packed into the floor strike, or the bottom bolt drags on a threshold that was replaced with a taller one. Because both latches must engage for the door to be secure, a vertical rod device with one latch out of adjustment will appear to latch and then push open. A mortise exit device, with the lock body inside the door edge, behaves more like a conventional mortise lock and usually fails at the strike or from a worn latch bolt. The underlying geometry is the same one described on the page about a door latch not catching the strike plate, scaled up to heavier hardware and higher cycle counts.
If the device has been altered, the finding is about the device itself. Dogging left engaged is the most common. A cylinder dogging feature left in the dogged position by a departed employee, or a hex dogging that was never released after a delivery, holds the latch retracted indefinitely. A deadlatch plunger on a rim device that has been filed, taped, or wedged so the door can be pulled open from outside without a key is a security defeat that also prevents proper latching. A strike replaced with a wrong pattern belongs here too. Electrified devices deserve their own line, since a device wired for electric latch retraction that has been left energized by a stuck access control output will sit unlatched all night and look mechanically perfect.
On pairs of doors, two more causes appear. A coordinator, the bar across the top of the frame that makes the inactive leaf close first, can fail or fall out of adjustment, and the active leaf then closes against an inactive leaf that is not yet home, so neither latches. An astragal or overlapping edge added for weather or security can interfere with the sequence in the same way.
What a manager can do safely today
Check the dogging first. Look for the hex socket on the device body or a cylinder near the end cap, and if the device is dogged, undog it. If the door is a fire door and the device has a mechanical dogging feature, note that for the technician, because the device may be the wrong type for the opening. Push the door closed by hand from a few inches and watch the latch. If it drops into the strike when closed by hand but not when released from full open, the closer is the issue. Look at the floor strike on a vertical rod door and clear the dirt, cigarette butts, and mop residue that pack into it. Look at the strike on a rim device for loose screws and a wear mark. Check whether an electrified device has an access control system holding it retracted, which usually means a call to whoever installed that system.
Then, if the door still will not latch and the building must be secured, assign a person to the door or arrange guard coverage until the repair. That is the correct temporary measure. Locking the door with anything that defeats the bar never is.
What not to do, and why it matters more here
Do not chain, padlock, bar, or wedge the door, for the reasons above. Do not add a deadbolt or surface bolt to an exit door, since a door with an exit device may not have any additional locking that requires a separate action to release. Do not replace an exit device with an ordinary lever lock to save money, because the code required the device for a reason, and the inspector will require it again. Do not replace fire exit hardware with panic hardware, or the other way around, without checking the door’s rating. Do not install a device that is not listed for the door. Do not remove the deadlatch plunger to make the door easier to open from outside. Every one of these shows up on an inspection, and every one of them shifts responsibility for whatever happens next onto the person who did it.
Which trade owns which part of the repair
A locksmith handles the exit device itself, the strike, the latch bolts, the rods and their adjustment, the deadlatch, the cylinder and dogging, and the door closer. Most latching failures fall entirely inside that scope. A door and frame contractor is needed when the frame has moved, when the door is so badly sagged that hinges or pivots must be replaced or the door rehung, or when the rated door or frame itself is damaged and the assembly needs to be restored. An electrician or the access control installer handles electrified retraction, power supplies, and fire alarm interfaces. On fire rated assemblies, the periodic inspection and its documentation may involve a fire door inspector, which is a separate service from the repair. If the push bar retracts and the door still will not open at all, which is a different and rarer failure, the page on a lock that turns but the door won’t open describes the bound bolt conditions that apply to commercial doors as well.
What a professional visit involves
A technician who services commercial exit hardware starts by reading the device: manufacturer, model, listing label, fire exit or panic, rim, vertical rod, or mortise, and whether it is electrified. They check the door and frame for sag and the closer for full closing, since fixing the device on a door that does not close is wasted work. On a rim device they reset or replace the strike, replace a worn latch bolt or deadlatch, and confirm the deadlatch plunger is held by the strike lip when the door is closed. On a vertical rod device they adjust rod length so both latches engage, replace stretched rods or worn latch heads, clear and reset the floor strike, and confirm the bottom bolt clears the threshold. On a mortise device they service the lock body and strike. They release or, on a fire door, remove any mechanical dogging that should not be there, and they replace a device that is the wrong type for the opening with one that is listed for it. They set the closer so the door latches on its own from any opening angle. Before leaving, they cycle the door from full open and from a few inches, with and without a hand on it, until it latches every time, and they leave the manager a written record of what was done, which is what the next inspector will want to see. This is routine work for Pro Locksmith’s commercial technicians, who carry rim and vertical rod parts, strikes, and closers for the common lines.
Staying compliant after the repair
Walk every exit door monthly. Push the bar, let the door go from full open, and watch it latch. Look at each fire door for a dogging hex or cylinder that should not be there. Keep the floor strikes clean. Keep a log with the date, the door, and what was observed, and attach repair records to it. Have exit hardware and closers serviced on a schedule rather than on failure, because a technician can see a strike or rod heading toward failure well before the door stops latching. Train staff that no exit door is ever to be chained, wedged, or blocked, and that a door that will not latch is reported the same day.
A push bar that does not latch is not the emergency a fire is, but it is the condition that turns a fire into a tragedy when it is handled wrong. Treat it as a life-safety item, secure the door with people rather than hardware until it is fixed, and have it repaired by someone who understands the listing on the label. Pro Locksmith’s commercial service is available to business owners and property managers throughout Broward County with 24-Hour Emergency coverage at (954) 406-8266 for an exit door that has to be compliant and secure before the building opens or closes.