Picture moving toward a door in the dark, in smoke, with a crowd pressing behind you. How much time do you have to find a handle, grip it and turn it the right way? That question is the entire reason panic hardware exists. A lever handle waits for the deliberate action of someone who wants to open a door. A panic bar converts the pressure of a body hitting it into a release. They are built for different scenarios.
How a fire door handle works
Lever sets used on escape routes differ from ordinary door furniture. Handle sets tested for fire doors use heat-resistant materials and internal mechanisms arranged so they do not seize as temperature rises. In most installations one face carries the lever and the other a cylinder lock: exit by lever from inside, entry by key from outside. Lever sets are adequate on narrow corridors, technical room entrances and floor-level doors used by few people.
How a panic bar works
A panic bar is a horizontal rail spanning most of the leaf width. Pressure applied anywhere along it releases the latch and, where fitted, the top and bottom bolts simultaneously. Its critical properties:
- Releases in one movement, with no second action, turn or lift.
- No need to locate a handle, since the rail runs across the leaf.
- Opens under body pressure, so a crowd surge cannot leave the door latched.
- Can be operated by elbow or torso when hands are full or the user is injured.
- The outside face can still carry a lever and cylinder for authorised entry.
Push bar versus touch bar
Two formats exist. A push bar spans the leaf and responds to pressure at any point, which is what high-density evacuation routes need. A touch bar is a slimmer pad pressed downward and takes pressure from a defined zone; it suits lightly used exits and looks less industrial.
Where each belongs
The decision follows occupant numbers behind the door and its position on the escape route. Panic hardware is required where a crowd must pass in the evacuation direction: assembly areas, school and dormitory corridors, office escape stair exits, cinema and sports hall exits, car park escape doors. Lever sets suffice where few people pass and the door is not on the main escape line: plant rooms, switchboard rooms, store entrances, lobby interconnections. The fire strategy drawings state the distinction; it is not a site preference.
Two faces, two arrangements
The usual configuration is panic hardware on the escape face and keyed entry on the other, so leaving is always free while entering stays controlled. Adding access control does not change the rule: an electronic lock must never obstruct the escape direction and must release the door on power failure. If cabling has to run inside the leaf, plan it at production stage, because drilling a rated leaf afterwards voids the certification.
Double leaf sets
On a double-leaf escape door the hardware list grows: panic hardware on the active leaf, either a second panic set or top and bottom bolts on the inactive leaf, a sequence selector so the inactive leaf closes first, and a closer on each leaf. Where evacuation capacity is calculated across both leaves, both must be openable from the escape side.
Maintenance and ordering
Panic bars fail for almost one reason only: cleaning water entering the mechanism, or dust jamming the bottom bolt at the threshold. Monthly, confirm that the bar releases in one movement, the latch seats without slamming, and the bolts run free. On lever sets, watch for loose screws and developing play. Send us your door schedule with occupant numbers per door and we will compare panic and lever options across our fire door range. For common-area openings outside the escape route, sheet panel doors are sufficient. Hardware is boxed separately and ships with the doors from Istanbul.
