What Are Push Bars and Panic Hardware?

Neighbors Ask

The short version

Push bars are the long horizontal bars you see on the inside of doors at schools, stores, restaurants, clinics, warehouses and church halls. You lean on the bar, the latch pulls back, and the door swings open. No knob to turn, no key to find, no thumb turn to hunt for. That is the whole point.

Panic hardware is the name used for exit devices designed for situations where a crowd might need to leave a building in a hurry. The term comes from the idea that a person in a panic should not have to think about how to open a door. A push, or a press, is all it takes. Inside the device, a spring loaded latch is connected to the bar by a mechanism, and pushing the bar draws the latch out of the frame.

So when people ask what is the difference, the plain answer is that push bar describes the shape, and panic hardware describes the job. Not every bar you see is formal panic hardware, and the rules about where it must be used belong to local codes and building officials, which vary. We will explain the parts, the types and the care, and leave the rule making to the people who write the rules.

Why these devices exist

Think about a knob or a lever on an exit door. In an emergency, a person may be carrying something, helping a child, or surrounded by others, and the simplest motion is a push of the body. A bar across the door catches that motion. A hand, a hip or a shoulder opens the door, and people moving behind can keep going.

For this reason, doors that serve crowds tend to have bars. A gym, a theater, a store with a stockroom, a church hall, a classroom wing, a restaurant kitchen door. They share one thing: many people, a need to leave in a hurry, and a door that should never trap anyone inside.

There is a security side to this as well. A door that opens easily from inside must still resist entry from outside. Good exit devices are built to do both. The outside of the door usually has no handle at all, or a lever or a cylinder that works only with the right key. Our page on door hardware for business describes how those pieces fit together.

How a push bar works inside

Behind the bar is a simple mechanism. When you press the bar, a linkage pulls back a latch bolt that normally extends into the door frame. With the latch drawn in, the door swings open. When you release the bar and the door closes, a spring pushes the latch out again, and it catches on the strike on the frame.

The latch is usually angled, so when the door closes it slides over the strike and snaps into place without a key. That is similar to a spring latch on a house door. The difference is the way it is operated from the inside, by pressing a long bar rather than turning a knob.

Some devices have more than one latch point. A door with a bolt at the top, one at the bottom and one at the center holds more securely, because it is held at several points. This arrangement uses rods that run inside or along the door. Our guide on door closers covers the small hydraulic device that brings the door shut so the latch can catch.

The main types you will see

There are a few common types. The most common is the rim device, which mounts on the surface of the door and latches at the edge. The bar sits on the inside face, and the latch housing is visible on the surface of the door.

A second type is the vertical rod device. It has a rod that runs up and a rod that runs down, with latches at the top and bottom of the door. This type is common on double doors where there is no center post, and on doors where holding strength at the top and bottom matters. A third type is the mortise device, where the lock body sits inside a pocket cut into the door, and the bar links to it.

A fourth is a concealed rod, where the rods are hidden inside the door for a cleaner look. Each type suits different doors, and a professional chooses based on the door, the frame and the way the building is used. If you are replacing a device, bring photos and measurements.

Think about how this works in a crowded setting. If twenty people lean on a door at once, the force can be large. A good device is built to release under that load, rather than jamming. That is why exit devices tend to be heavier than ordinary locks, and why a bargain bar from an unknown source is a poor bargain on a door that matters. Look for solid construction, a smooth action, and a design intended for the amount of traffic the door sees.

What the outside of the door looks like

The inside has the bar. The outside can be one of several things. On a door meant for exit only, the outside might be a plain plate with no handle, so that nobody can enter from that side. A door like that can only be opened from the inside, and that is a feature, not a flaw.

On a door that people enter as well as exit, the outside may have a lever, a pull handle with a key cylinder, or a keypad. In many cases the outside is locked until someone uses a key to retract the latch, while the inside still opens by pressure alone. That is the key idea: the inside is always ready to leave, while the outside is controlled.

Picture a small shop with a back door by the stockroom. From the alley, the door shows a plain steel face with a keyhole. From inside, it has a bar. Staff can leave by simply pushing, but a person in the alley cannot get in without the key. Our page on business lock service explains the key side.

Wording on the outside matters too. A small sign saying emergency exit only, or a plain door with no handle, tells visitors how to behave. But signs do not stop a determined person, so the hardware does the real work. A clean, tight fit between door and frame, a well anchored strike and a solid latch together make the outside hard to open without a key.

What dogging means

Some push bars have a feature called dogging. It holds the latch back so the door does not lock when closed. Usually the dogging is done with a small hex key or a cylinder on the bar. Once set, the bar stays pressed, and the door can be pushed open from either side without a key.

Dogging is used in places where the door needs to be open for the public during business hours, such as a store entry. At closing time, the owner or manager releases the dogging, and the door latches again. It is a convenience, and it is also a point of risk if someone forgets to release it at night.

Because of this, a good routine matters. Add dogging checks to your opening and closing list. If your door has a cylinder for dogging, treat that key like any other important key. Our guide on how an office handles keys when an employee leaves shows how to keep control of those keys.

Alarms are a related option. Some exit devices include a small alarm that sounds when the bar is pressed, so staff know someone has used a door that should stay closed. Others connect to a wider system. These extras are common on doors that are watched, and they need power or batteries, so include them in your checks. A dead battery in an alarm is easy to miss until the day it matters.

Fire doors and special situations

Some doors carry special duties, such as slowing the spread of fire. Those doors usually have specific hardware and may need exit devices designed for that purpose. You cannot tell by eye which is which, and the rules about where each applies are a matter for local officials, not for us.

What we can say is that safety hardware should never be altered carelessly. Do not chain, block or wedge an exit door. Do not disable a bar because it is annoying. Do not swap a bar for a knob without asking whoever is responsible for building safety in your location. These hardware choices exist to protect people.

If you are unsure which rules apply to your building, ask the local building or fire authority, or your landlord or property manager. A locksmith can tell you what a device does and how to repair it, and can work with your requirements. We do not make rules, and we do not give legal advice.

It helps to keep a short log of when each door was last checked. A single line in a notebook, with a date and a note such as closer adjusted or latch tested, is enough. Over a year, those lines tell you which door gives trouble and when, and they show a landlord or inspector that you pay attention.

Keeping a push bar in good shape

Exit devices work hard. They are pressed hundreds of times a day, slammed, leaned on and sometimes kicked. Even sturdy ones need care. Look at yours every few months. Press the bar. It should move easily and return fully. The latch should retract and extend with a clean motion.

Listen for scraping or grinding. Watch whether the door closes completely and the latch catches without a push. If the door hangs open slightly, the closer may need adjusting, which we cover in the guide linked above. Check the strike plate on the frame. Look for loose screws, cracked paint and worn metal.

Cold and heat affect these devices. In the mountain towns around Mount Shasta, Dunsmuir and McCloud, cold can thicken lubricant and slow a closer, and snow can build against a door. In the Redding valley, summer heat and dust can stiffen a mechanism. If a bar sticks, do not force it. Our page on lock repair and adjustment describes what a professional can do.

For restaurants and food businesses, grease and humidity are enemies of a back door bar. For warehouses, dust and pallet jacks bumping the door take a toll. For schools and churches, heavy daily traffic and enthusiastic young users do. Each setting has a typical failure, and a locksmith who sees them regularly can suggest a more suitable device or a more frequent check.

Common problems and what they mean

A bar that feels loose or wobbly usually has loose mounting screws, and tightening may help. A bar that sticks down often has a bent linkage or a dry mechanism. A latch that does not extend fully can mean the spring is worn or the door sags and drags.

A door that will not latch is a serious issue for a business. If the latch fails to catch, the door can be left unlocked overnight without anyone realizing. Test it at closing by pushing and pulling from the outside. Our guide on doors that will not close discusses the usual causes.

A bar that works but a key cylinder that sticks is another common call. Cylinders on the outside face weather, dust and keys. Our guide on what to do about a stuck key helps you decide what to try before calling anyone.

When to bring in a professional

Call a locksmith when a bar will not retract, when a door does not latch, when parts are visibly bent or broken, or when you want to change the outside trim or the cylinder. Exit hardware has springs under tension and parts that must be aligned, so repairs are wisest left to someone who does this regularly.

A mobile locksmith can come to the building, examine the device, and tell you whether to adjust, repair or replace it. If the key cylinder needs to match your other locks, bring them into the conversation. The request form is where you describe the door, the problem and the number of doors.

Local pages for Redding, Anderson and Yreka explain how we work in those communities. For emergencies, see emergency help at any hour.

Questions to ask about your own exit doors

Walk through your building and answer these. Write down anything that surprises you.

• Does each exit door open from inside with one push and no key?
• Does the door close fully and latch every time?
• Is the outside locked when it should be, and open when it should be?
• Is dogging released at closing time?
• Are the keys to outside cylinders on the key list?

Good to know

Common questions