NFPA 80, Standard for Fire Doors and Other Opening Protectives, explicitly mandates the inspection and testing of fire door assemblies. This standard requires that these assemblies be examined and functionally tested at least once a year to ensure they are in proper operating condition and can perform their intended function during a fire. The annual inspection includes verifying that all components, such as the door, frame, hinges, latching hardware, and closing device, are present and in good working order. A written record of the inspection must be maintained for review by the Authority Having Jurisdiction (AHJ).

A. Every month: This frequency is not the minimum requirement established by NFPA 80 for standard fire door assembly inspections.

B. Every 6 months: While more frequent inspections are permitted, the minimum mandated interval is annual, not semi-annual.

D. Every 2 years: This interval is insufficient and fails to meet the minimum safety and maintenance frequency required by the standard.

1. NFPA 80, Standard for Fire Doors and Other Opening Protectives, 2019 Edition. Chapter 5, "Care and Maintenance," Section 5.2.1 states, "Fire door assemblies shall be inspected and tested not less than annually, and a written record of the inspection shall be signed and kept for inspection by the AHJ."

2. NFPA 101, Life Safety Code, 2021 Edition. Chapter 8, "Features of Fire Protection," Section 8.3.3.1, references NFPA 80 for the installation, inspection, testing, and maintenance of fire door assemblies, thereby incorporating the annual requirement.

3. Oklahoma State University, School of Fire Protection and Safety Engineering Technology. Course FSET 4153, "Fire Protection Systems." Course materials on Passive Fire Protection Systems discuss the maintenance requirements for fire-rated assemblies, citing the annual inspection and testing frequency for fire doors as specified in NFPA 80, Section 5.2.