What percent of fire doors actually work?

• A. 40%
• B. 60%
• C. 50%
• D. 70%

Answer: (C)

Fire doors only protect people and spaces if they actually close and latch automatically when they’re supposed to. That reliability hinges on proper installation, hardware, and ongoing maintenance. Real-world checks have shown that roughly half of fire doors don’t function as intended, so fifty percent is the best-supported figure. When a door fails, it’s usually due to issues like misadjusted or faulty door closers, worn or damaged latches, misaligned frames, or obstructions that prevent full closure. In Florida practice, inspectors verify that the door can close completely, latch securely, and that there are no obstructions or improper hold-open devices, in line with NFPA 80 maintenance and annual testing requirements.