Which term refers to the metal bar on a door that disengages the latch when pushed?

Which term refers to the metal bar on a door that disengages the latch when pushed?

• A. Door knob
• B. Push bar
• C. Panic bar
• D. Crash bar

Answer: (D)

The function being tested is the device on an exit door that you push to unlatch the latch and allow quick egress. This is a crash bar (also known as a panic bar). It’s a horizontal bar mounted on the door that, when pressed anywhere along its length, retracts the latchbolt so the door opens without needing to turn a knob or use a key. This design supports fast, safe evacuation in emergencies and is preferred in public buildings for its ease of use under stress. A door knob requires twisting to open, and a generic “push bar” term isn’t as precise, while panic bar is a widely used synonym—the key idea is the bar you push to release the latch.

The function being tested is the device on an exit door that you push to unlatch the latch and allow quick egress. This is a crash bar (also known as a panic bar). It’s a horizontal bar mounted on the door that, when pressed anywhere along its length, retracts the latchbolt so the door opens without needing to turn a knob or use a key. This design supports fast, safe evacuation in emergencies and is preferred in public buildings for its ease of use under stress. A door knob requires twisting to open, and a generic “push bar” term isn’t as precise, while panic bar is a widely used synonym—the key idea is the bar you push to release the latch.