Which statement correctly describes the permissible hole size in a fire-label door?

• A. None
• B. Quarter inch
• C. One inch
• D. Half inch

Answer: (A)

Fire-label doors must stay intact to maintain their listed fire resistance. Any hole in the door provides a pathway for heat and flames, compromising the door’s ability to resist fire. The openings that do exist are part of the door’s listed hardware and must be installed according to the manufacturer’s labeling. Outside of those pre-approved openings, no additional holes are allowed. Therefore, there is no permissible hole size for a fire-label door; holes of any size would weaken the fire rating.