What Is an Exit Device (Panic Bar)?
An exit device -- commonly called a panic bar, crash bar, or push bar -- is a door-latching assembly that releases the latch when pressure is applied in the direction of egress travel. One push opens the door. No turning, no key, no fumbling in an emergency. When installed on a fire-rated door assembly, the device must be specifically listed as fire exit hardware -- a designation that carries its own testing and labeling requirements.
This guide covers the four main panic bar types, fire rating requirements, key code triggers, and electric configurations. Whether you are a school facilities director, a commercial sub pricing a hardware schedule, a healthcare construction manager, or an industrial maintenance tech replacing a worn device, the information below will help you specify correctly and stay compliant.
The Four Main Types of Panic Bars
Exit devices are classified by how their latching mechanism interacts with the door frame. Choosing the wrong type for a given door or frame prep is one of the most common and costly field mistakes.
1. Rim Exit Device
The rim device is the most widely used type. Its latch bolt projects horizontally into a surface-mounted strike on the door frame or the inactive leaf of a pair. Installation is straightforward, and the device works on most standard hollow metal doors. If you are replacing an existing unit on a single egress door in a school corridor or retail back-of-house, a rim device is almost always the right starting point.
2. Mortise Exit Device
A mortise exit device combines a panic bar chassis with a mortise lock case. The latch -- and optional deadbolt -- projects into a mortised strike in the frame. This configuration offers higher security and a cleaner latch engagement than a rim device, but it requires more complex frame prep. It is commonly specified in healthcare facilities and secure commercial corridors where both life safety egress and ingress control are priorities.
3. Surface Vertical Rod (SVR) Exit Device
SVR devices use rods that run on the face of the door to engage strike points at the top of the frame head and, optionally, at the floor or threshold. Two-point latching makes them well suited for pairs of doors in educational occupancies, industrial exit corridors, and auditorium egress paths. A less-bottom-rod (NB) configuration eliminates the floor strike and reduces the tripping hazard at heavy-traffic thresholds.
4. Concealed Vertical Rod (CVR) Exit Device
The CVR provides the same two-point latching as the SVR but routes rods inside the door stile through routed channels. The result is a cleaner appearance that architects frequently specify for high-visibility lobbies, healthcare main entries, and retail flagship locations. CVR devices require a hollow door stile of sufficient interior dimension and are available for hollow metal, aluminum, and wood door construction.
When Are Exit Devices Required by Code?
Panic hardware is not required on every commercial door -- it is triggered by occupancy type and occupant load together. Both criteria must be met.
- IBC 2006 and later: Required on doors in the means of egress serving Assembly or Educational occupancies with an occupant load of 50 or more.
- IBC 2003: Same occupancies, but the threshold is 100 persons.
- NFPA 101 (2003-2015): Required on means of egress doors serving Assembly, Educational, or Day-care occupancies with an occupant load of 100 or more.
- Electrical rooms (NEC/NFPA 70 from 2002): Rooms housing electrical equipment rated 600V or higher, 1,200A or higher, or transformer vaults require panic hardware regardless of occupancy classification.
A few additional rules apply universally once panic hardware is required:
- The actuating touchpad or crossbar must span at least half the width of the door leaf.
- The device must be mounted between 34 and 48 inches above the finished floor.
- A force of no more than 15 pounds applied to the touchpad must release the latch.
- No secondary locking device -- padlock, chain, deadbolt, hasp -- may be added to a door required to have panic hardware.
- On balanced doors, only a pushpad or touchpad style is permitted; crossbar devices are not allowed because the geometry of a balanced door makes a crossbar unsafe.
Fire Exit Hardware: Ratings and Requirements
When an exit device is installed on a fire-rated door assembly, it must be listed as fire exit hardware -- not simply as an exit device. The distinction matters legally and during annual fire door inspections.
Fire exit hardware carries a UL 10C listing and is tested as a complete assembly -- door, frame, and hardware -- at elevated temperatures for a defined duration. Rating periods are designated as follows:
- 3-hour (A-Label): Typically stairwell and shaft enclosure doors in high-rise construction.
- 1-1/2-hour (B-Label): Common in corridor and tenant separation walls.
- Shorter ratings (20-minute, 45-minute) apply to specific partition and corridor door applications per the applicable code edition.
The fire door itself must bear a label that explicitly states it is equipped with fire exit hardware. If that label is missing or illegible, it is a documented deficiency under NFPA 80 annual inspection requirements and must be corrected without delay.
Critical rule on mechanical dogging: Fire exit hardware cannot be mechanically dogged (held in the retracted position with a key or hex wrench) because a mechanically dogged latch cannot reset automatically on a fire alarm. Electric latch retraction is permitted on fire-rated devices provided the latch projects automatically when the fire alarm activates. If you are specifying a fire door in a school gymnasium or a healthcare corridor and the architect calls for a dogged device, the correct specification is an electric latch retraction (ELR) panic bar tied to the fire alarm system -- not a mechanical dog.
Electric Configurations for Panic Bars
Electrified exit devices add access control to the ingress side of a door without ever compromising egress. Pushing the bar always opens the door -- that is non-negotiable and cannot be overridden by any electric configuration.
Electric Latch Retraction (ELR)
ELR electrically retracts the latch bolt so the door can open without physically pushing the bar -- useful for hands-free access in hospital corridors, assisted living facilities, and loading dock entries. ELR devices are available in fire-exit-listed configurations. On a fire alarm signal, the latch must re-project immediately.
Electric Trim -- Fail-Secure
The outside lever or handle is electrically locked. Egress via the bar is always free. Power applied unlocks the outside trim for ingress; power removed keeps the outside trim locked. This configuration is appropriate for standard access-controlled egress doors where security on power loss is the priority -- a common spec in retail stockrooms, industrial secure zones, and school exterior doors.
Electric Trim -- Fail-Safe
Power applied keeps the outside trim locked; power removed unlocks it for free ingress. This is the specified configuration for high-rise stair tower re-entry doors (IBC 403.5.3) where occupants must be able to re-enter from the stair side during a power failure. Egress through the bar is always free regardless of electric state.
Switch-in-Bar for Electromagnetic Lock Release
Some openings combine an exit device with an electromagnetic lock. The panic bar chassis contains a switch that directly interrupts power to the maglock when the bar is depressed. This is the code-compliant method under the 2012 IBC and later. The switch must be UL Listed for this purpose, and the interruption must be direct -- routing the signal through an access control CPU before cutting lock power is a code violation and has caused documented entrapment incidents.
Selecting the Right Device: Key Considerations
Before specifying or ordering an exit device, confirm the following:
- Door material and stile width: Wide-stile hollow metal, narrow-stile aluminum, and wood doors each have minimum stile requirements. Verify the device family fits the actual stile dimension.
- Door thickness: Standard devices are built for 1-3/4-inch doors. Thicker doors require a special-order thick-door option -- note this on the hardware schedule.
- Fire rating: If the door carries a fire label, the exit device must also carry a fire exit hardware listing. Confirm before ordering.
- Handing: Exit devices are handed (RHR or LHR). Outside trim, strikes, and some rods are handed components even when the main chassis is reversible.
- Dogging method: Mechanical dogging is not permitted on fire-rated openings. Specify ELR with fire alarm tie-in where a hold-open function is needed on a rated door.
- Pairs of doors: Overlapping astragals on pairs with two vertical rod devices can prevent one leaf from opening independently. Coordinate astragal and device selection together.
- Mounting height: Standard centerline height is 41 inches AFF for most commercial applications; 38 inches is the common specification for elementary school doors.
Preferred Product Lines at DoorwaysPlus
DoorwaysPlus stocks and specifies exit devices from Sargent, Corbin Russwin, Hager, PDQ, and Accentra (formerly Yale) -- lines recognized for consistent ANSI/BHMA A156.3 Grade 1 performance and stable parts availability. For fire-listed rim devices, surface vertical rod units, concealed vertical rod configurations, and electrified variants, our team can match the right device to your door type, fire rating, and access control requirement.
If you are evaluating a replacement and the existing hardware is from a different manufacturer, we can identify a compatible or equivalent device from our preferred lines and confirm the fire listing applies to your rated opening.
Get the Right Exit Device for Your Project
Exit devices sit at the intersection of life safety, code compliance, and daily operational security. Specifying the wrong type -- or installing a non-listed device on a fire door -- creates real liability during inspections and in an actual emergency.
The team at DoorwaysPlus.com works with contractors, facility managers, architects, and industrial maintenance teams to match the correct exit device to the opening, confirm fire listing requirements, and support hardware schedules from early specification through final installation. Browse our exit device category or contact us directly for project-specific guidance.