Emergency exit doors must open quickly even when occupants are under pressure and unfamiliar with the building. Panic exit devices provide this function through a horizontal bar or touchpad installed across the inside face of the door. Pressing anywhere along the operating section retracts the latch, allowing the door to swing toward the escape route without requiring a key or complicated hand movement.
The panic bar working mechanism transfers inward pressure from the bar to the device’s internal linkage. This linkage pulls the latch away from the strike or retracts the vertical rods from their locking points. Once the latch is clear, normal outward force opens the door.
After the user releases the bar, internal springs return the mechanism to its original position. When the door closes, the latch engages again so the entrance remains secure from the outside.
The operating sequence is straightforward:
The user pushes the touch bar.
Internal linkage retracts the latch.
The door releases immediately.
The closer controls the opening and closing movement.
The latch automatically re-engages after closing.
A rim model has a surface-mounted latch that engages with a strike on the frame. It is commonly specified for single doors and pairs fitted with a mullion.
This configuration operates a Mortise Lock installed inside the door. It provides a clean appearance and can coordinate with higher-security commercial door systems.
Vertical rods secure the door at the top, or at both the top and floor. These devices are often used on double doors where a central mullion is not desired.
| Project condition | Suitable configuration |
|---|---|
| Single commercial door | Rim device |
| Double doors with mullion | Two rim devices |
| Double doors without mullion | Vertical rod devices |
| Door requiring mortise lock | Mortise exit device |
| Fire-rated exit opening | Certified fire exit hardware |
Both allow rapid egress, but fire exit hardware must be approved for use as part of a fire-rated door assembly. Mechanical dogging, which holds the latch retracted, is generally not permitted on fire exit devices because the door must latch when closed.
Where dogging is needed on a non-fire-rated opening, buyers should confirm whether hex-key, cylinder or electronic dogging is suitable. The selected function must match the building’s access and life-safety requirements.
EN 1125 applies to panic exit devices operated by a horizontal bar in locations where panic may occur. UL 305 and relevant ANSI/BHMA requirements are commonly specified in North American projects. Fire-door installations may also require testing under EN 1634 or the applicable regional fire standard.
Important procurement details include:
Door width, height, thickness and weight
Single-door or double-door configuration
Door and frame material
Rim, mortise or vertical rod design
Fire-rating requirements
Exterior trim and access function
Finish and corrosion resistance
Handing and installation height
D&D supplies models for doors approximately 650–1100 mm wide, with selected configurations supporting door weights up to 200 kg. Final capacity must be verified against the tested model and complete opening design.
The panic bar, strike, trim, cylinder, hinges and closer operate as one opening system. An incorrect closer setting can make the door difficult to push, while a misaligned strike may prevent reliable relatching. Double doors also require careful coordination of astragals, mullions and latching points.
A capable panic bar wholesale supplier should review the door schedule before confirming production. Accurate configuration protects emergency operation, simplifies installation and gives facility teams a consistent replacement specification for future maintenance.
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